Heating, Ventilation and Air Conditioning Cadillac SRX I

Fastener Tightening Specifications

Fastener Tightening Specifications

Refrigerant System Capacities

Refrigerant System Capacities

Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check - Vehicle will provide the following information

1. The identification of the control modules which are not communicating.
2. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check - Vehicle will identify the correct procedures to begin vehicle diagnosis. These must be performed before system DTC or symptom diagnosis.

Leak Testing

Tools Required

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 41447 R-134A A/C Tracer Dye-Box of 24. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
3. J 42220 Universal 12V Leak Detection Lamp. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
4. J 43872 Fluorescent Dye Cleaner. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
5. J 46297 A/C Dye Injector Kit. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
6. J 46297-12 Replacement Dye Cartridges. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Refrigerant Leak Testing

The fluorescent dye mixes and flows with the polyalkylene glycol (PAG) oil throughout the refrigerant system.

Verifying some passive leaks may require using the J 39400-A , even though the A/C system contains fluorescent dye. See Special Tools .

The only time that adding additional fluorescent dye is required is after flushing the A/C system.

Fluorescent Leak Detector

Fluorescent dye will assist in locating any leaks in the A/C system.

1. Condensation on the evaporator core or the refrigerant lines may wash the PAG oil and fluorescent dye away from the actual leak. Condensation may also carry dye through the HVAC module drain.
2. Leaks in the A/C system will be indicated in a light green or yellow color when using the leak detection lamp. Use the leak detection lamp in the following areas: All fittings or connections that use seal washers or O-rings All of the A/C components The A/C compressor shaft seal The A/C hoses and pressure switches The HVAC module drain tube, if the evaporator core is suspected of leaking The service port sealing caps The sealing cap is the primary seal for the service ports.
3. Follow the instructions supplied with the J 42220 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
4. To prevent false diagnosis in the future, thoroughly clean the residual dye from any area where leaks were found. Use a rag and the approved J 43872 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Fluorescent Dye Injection

1. Not all of the fluorescent dyes are compatible with PAG oil. Some types of dye decrease the oil viscosity or may chemically react with the oil.
2. R-134A leak detection dye requires time to work. Depending upon the leak rate, a leak may not become visible for between 15 minutes and 7 days.
3. To prevent false diagnosis, thoroughly clean any residual dye from the service port with a rag and the approved fluorescent dye cleaner J 43872 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Halogen Leak Detector

Ensure that the vehicle has at least 0.45 kg (1 lb) of refrigerant in the A/C refrigeration system in order to perform a leak test. Refer to Refrigerant Recovery and Recharging for recharging the A/C system.

Clean and dry all surfaces in order to prevent a false warning. Liquids will damage the detector.

Follow the instructions supplied with the J 39400-A . See Special Tools .

Test Description

This test measures the operating efficiency of the A/C system under the following conditions

1. The current ambient air temperature
2. The current relative humidity
3. The high side pressure of the A/C system
4. The low side pressure of the A/C system
5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
2. 2: This step measures the performance of the A/C system.
3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.

Air Conditioning (A/C) System Performance Test (LH2 - Standard Cooling)

A/C Performance Table - With Rear A/C

Scheme 1

This test measures the operating efficiency of the A/C system under the following conditions

1. The current ambient air temperature
2. The current relative humidity
3. The high side pressure of the A/C system
4. The low side pressure of the A/C system
5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
2. 2: This step measures the performance of the A/C system.
3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.

Air Conditioning (A/C) System Performance Test (LH2 - Heavy Duty Cooling)

A/C Performance Table - With Rear A/C

Scheme 2

This test measures the operating efficiency of the A/C system under the following conditions

1. The current ambient air temperature
2. The current relative humidity
3. The high side pressure of the A/C system
4. The low side pressure of the A/C system
5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
2. 2: This step measures the performance of the A/C system.
3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.

Air Conditioning (A/C) System Performance Test (LY7 - w/o C57 - Standard Cooling)

A/C Performance Table

Scheme 3

This test measures the operating efficiency of the A/C system under the following conditions

1. The current ambient air temperature
2. The current relative humidity
3. The high side pressure of the A/C system
4. The low side pressure of the A/C system
5. The temperature of the air being discharged into the passenger compartment

The numbers below refer to the step numbers on the diagnostic table.

1. 1: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
2. 2: This step measures the performance of the A/C system.
3. 3: This step is to allow for vehicle variations as well as high ambient temperatures.

Air Conditioning (A/C) System Performance Test (LY7 - w/ C57 - Heavy Duty Cooling)

A/C Performance Table - With Rear A/C

Scheme 4

Air Conditioning (A/C) Diagnostics - Pressure Zone A

Air Conditioning (A/C) Diagnostics - Pressure Zone A

Air Conditioning (A/C) Diagnostics - Pressure Zone B

Air Conditioning (A/C) Diagnostics - Pressure Zone B

Air Conditioning (A/C) Diagnostics - Pressure Zone C

Air Conditioning (A/C) Diagnostics - Pressure Zone C

Air Conditioning (A/C) Diagnostics - Pressure Zone D

Air Conditioning (A/C) Diagnostics - Pressure Zone D

Heating Performance Diagnostic

Heating Performance Diagnostic

Defrosting Insufficient

Defrosting Insufficient

Noise Diagnosis - Auxiliary Blower Motor

Noise Diagnosis - Auxiliary Blower Motor

Noise Diagnosis - Blower Motor

Noise Diagnosis - Blower Motor

Noise Diagnosis - Air Conditioning (A/C) System

Noise Diagnosis - Air Conditioning (A/C) System

Noise Diagnosis - HVAC Module

Noise Diagnosis - HVAC Module

Odor Diagnosis

Odor Diagnosis

Eliminating Air Conditioning Odor

Odors may be emitted from the air conditioning system primarily at start up in hot, humid climates. The following conditions may cause the odor

1. Debris is present in the HVAC module.
2. Microbial growth on the evaporator core

When the blower motor fan is turned on, the microbial growth may release an unpleasant musty odor into the passenger compartment. To remove odors of this type, the microbial growth must be eliminated. Perform the following procedure

Deodorize the evaporator core using Deodorizing Aerosol Kit.

Perform the following steps in order to deodorize the A/C system

1. Ensure that the plenum that draws outside air into the HVAC module is clear of debris.
2. Disable the A/C compressor clutch operation by disconnecting the clutch coil electrical connector.
3. Dry the evaporator core by performing the following steps: Start the engine. Select the maximum temperature setting. Select the recirculation mode. Run the blower motor on high for 10 minutes.
4. Locate an area in the air conditioning duct between the blower motor and the evaporator core downstream of the blower motor.
5. Drill a 3.175 mm (0.125 in) hole where the hole will not interfere with or damage the following components: The blower motor The evaporator core Any other operating part the of system
6. Wear safety goggles and latex gloves in order to perform the following actions: Select the maximum blower speed. Insert the deodorizer extension tube into the hole to the mark on the extension tube. Use short spray bursts and vary the direction of spray for a 2-3 minute period of time.
7. Shut the engine OFF. Allow the vehicle to sit for 3-5 minutes.
8. Seal the 3.175 mm (0.125 in) hole with body sealer or RTV gasket compound.
9. Start the engine.
10. Operate the blower motor on high for 15-20 minutes to dry.
11. Reconnect the A/C compressor clutch coil electrical connector.
12. Verify proper clutch operation.
13. Using the scan tool enable the afterblow. Refer to «Afterblow Enable Procedure»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#hvac-systems-automatic__afterblow-enable-procedure) in HVAC Automatic.

Refrigerant Recovery and Recharging

Tools Required

1. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45037 A/C Oil Injector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Note. R-134a is the only approved refrigerant for use in this vehicle. The use of any other refrigerant may result in poor system performance or component failure.

Note. To avoid system damage use only R-134a dedicated tools when servicing the A/C system.

Note. Use only Polyalkylene Glycol Synthetic Refrigerant Oil (PAG) for internal circulation through the R-134a A/C system and only 525 viscosity mineral oil on fitting threads and O-rings. If lubricants other than those specified are used, compressor failure and/or fitting seizure may result.

Note. R-12 refrigerant and R-134a refrigerant must never be mixed, even in the smallest of amounts, as they are incompatible with each other. If the refrigerants are mixed, compressor failure is likely to occur. Refer to the manufacturer instructions included with the service equipment before servicing.

The J 43600 is a complete air conditioning service center for R-134a. See Special Tools . The ACR 2000 recovers, recycles, evacuates and recharges A/C refrigerant quickly, accurately and automatically. The unit has a display screen that contains the function controls and displays prompts that will lead the technician through the recover, recycle, evacuate and recharge operations. R-134a is recovered into and charged out of an internal storage vessel. The ACR 2000 automatically replenishes this vessel from an external source tank in order to maintain a constant 5.45-6.82 kg (12-15 lbs) of A/C refrigerant.

The ACR 2000 has a built in A/C refrigerant identifier that will test for contamination, prior to recovery and will notify the technician if there are foreign gases present in the A/C system. If foreign gases are present, the ACR 2000 will not recover the refrigerant from the A/C system.

The ACR 2000 also features automatic air purge, single pass recycling and an automatic oil drain.

Refer to the J 43600 ACR 2000 manual for operation and setup instruction. See Special Tools . Always recharge the A/C System with the proper amount of R-134a. Refer to Refrigerant System Capacities for the correct amount.

A/C Refrigerant System Oil Charge Replenishing

If oil was removed from the A/C system during the recovery process or due to component replacement, the oil must be replenished. Oil can be injected into a charged system using J 45037 . See Special Tools . For the proper quantities of oil to add to the A/C refrigerant system, refer to Refrigerant System Capacities .

Flushing (w/o Auxiliary A/C)

Tools Required

1. J 41447 R-134A - A/C Tracer Dye - Box of 24. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 42220 Universal 12V Leak Detection Lamp. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
3. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
4. J 45268 A/C Flush Adapter Kit. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Flushing is intended to remove the following

1. Contaminated polyalkylene glycol (PAG) oil
2. Desiccant, following a desiccant bag failure
3. Overcharge of PAG oil
4. Refrigerant contamination

Forward Flushing Setup

1. Install the J 45268-7 (2) onto the suction line adapter block J 45268-13 (1).
2. Install the J 45268-8 (3) onto the discharge line adapter block J 45268-12 (4).

Reverse Flushing Setup

1. Install the J 45268-8 (2) onto the suction line adapter block J 45268-13 (1).
2. Install the J 45268-7 (3) onto the discharge line adapter block J 45268-12 (4).

Flush Procedure

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the thermal expansion valve (TXV). Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
3. Install new O-rings onto the evaporator core and A/C lines. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
4. Install the A/C lines into J 45268-110.
5. Install J 45268-110 onto the evaporator core.
6. Install the TXV line bracket.
7. Install TXV mounting bolts. Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
8. Remove the A/C compressor. Refer to «Compressor Replacement (LY7 )»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Compressor Replacement (LH2 - Heavy Duty Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__compressor-replacement-lh2-heavy-duty) or «Compressor Replacement (LH2 - Standard Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
9. Service the filter with ACDelco P/N GF 470, before each flush.
10. Install the J 45268-13 to the A/C suction line.
11. Install the J 45268-12 to the A/C discharge line.
12. Connect the J 45268-1 flush filter to the J 45268-7 flush fitting.
13. Connect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
14. Connect the red hose from the J 43600 to J 45268-8 flush fitting. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
15. Flush the A/C system. Follow the instructions supplied with the J 43600 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
16. Disconnect the red hose from the J 43600 to J 45268-8 flush fitting. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
17. Disconnect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
18. Disconnect the J 45268-1 flush filter from the J 45268-7 flush fitting.
19. Remove the J 45268-12 from the A/C discharge line.
20. Remove the J 45268-13 from the A/C suction line.
21. If you will reinstall the removed A/C compressor, perform the following procedure: Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. IMPORTANT: Rotating the compressor hub assembly when adding PAG oil to the A/C compressor suction port will draw the PAG oil into the crankcase chamber and prevent overflow. Add the total system capacity of PAG oil into the suction port of the A/C compressor while slowly rotating the A/C compressor hub assembly. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) . IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system. Add one bottle of J 41447 directly into the suction port of the A/C compressor while slowly rotating the A/C compressor hub assembly. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
22. Install the A/C compressor. Refer to «Compressor Replacement (LY7 )»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Compressor Replacement (LH2 - Heavy Duty Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__compressor-replacement-lh2-heavy-duty) or «Compressor Replacement (LH2 - Standard Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
23. Remove the TXV mounting bolts.
24. Remove the TXV line bracket.
25. Remove J 45268-110 from the evaporator core.
26. Remove the A/C lines from J 45268-110.
27. Inspect the TXV for debris. Clean or replace as needed.
28. Replace the desiccant bag. Refer to «Desiccant Bag Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
29. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
30. Leak test the fittings using J 42220 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Flushing (w/Auxiliary A/C)

Tools Required

1. J 41447 R-134A - A/C Tracer Dye - Box of 24. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 42220 Universal 12V Leak Detection Lamp. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
3. J 43600 ACR 2000 Air Conditioning Service Center. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
4. J 45268 A/C Flush Adapter Kit. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Flushing is intended to remove the following

1. Contaminated polyalkylene glycol (PAG) oil
2. Desiccant, following a desiccant bag failure
3. Overcharge of PAG oil
4. Refrigerant contamination

1. Install the J 45268-7 (2) onto the suction line adapter block J 45268-13 (1).
2. Install the J 45268-8 (3) onto the discharge line adapter block J 45268-12 (4).

1. Install the J 45268-8 (2) onto the suction line adapter block J 45268-13 (1).
2. Install the J 45268-7 (3) onto the discharge line adapter block J 45268-12 (4).

Flush Procedure - Front System

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the front thermal expansion valve (TXV). Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
3. Inspect the O-rings on the evaporator core and A/C lines and replace as necessary. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
4. Install the A/C lines into J 45268-110.
5. Install J 45268-110 onto the evaporator core.
6. Install the TXV line bracket.
7. Install TXV mounting bolts. Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
8. Remove the A/C compressor. Refer to «Compressor Replacement (LY7 )»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Compressor Replacement (LH2 - Heavy Duty Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__compressor-replacement-lh2-heavy-duty) or «Compressor Replacement (LH2 - Standard Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
9. Service the filter with ACDelco P/N GF 470, before each flush.
10. Inspect the O-rings on the A/C discharge and suction lines and replace as necessary. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning)
11. Install the J 45268-13 to the A/C suction line.
12. Install the J 45268-12 to the A/C discharge line.
13. Connect the J 45268-1 flush filter to the J 45268-7 flush fitting.
14. Connect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
15. Connect the red hose from the J 43600 to J 45268-8 flush fitting. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
16. Flush the A/C system. Follow the instructions supplied with the J 43600 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
17. Remove the front TXV mounting bolts.
18. Remove the front TXV line bracket.
19. Remove J 45268-110 from the evaporator core.
20. Remove the A/C lines from J 45268-110.
21. Inspect the TXV for debris. Clean or replace as needed.
22. Install the TXV. Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Flush Procedure - Auxiliary A/C System

1. Remove the auxiliary TXV. Refer to «Thermal Expansion Valve Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the J 45268-111 in place of the auxiliary TXV.
3. Install auxiliary TXV assembly onto the evaporator core.
4. Install auxiliary TXV mounting bolts. Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
5. Connect the auxiliary evaporator core inlet line to the auxiliary evaporator core. Tighten: Tighten the nut to 9 N.m (80 lb in).
6. Connect the auxiliary evaporator core outlet line to the auxiliary evaporator core. Tighten: Tighten the nut to 9 N.m (80 lb in).
7. Service the filter with ACDelco P/N GF 470, before each flush.
8. Flush the auxiliary A/C System. Follow the instructions supplied with the J 43600 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
9. Disconnect the red hose from the J 43600 to J 45268-8 flush fitting. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
10. Disconnect the blue hose from the J 43600 to J 45268-1 flush filter adapter. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
11. Disconnect the J 45268-1 flush filter from the J 45268-7 flush fitting.
12. Remove the J 45268-12 from the A/C discharge line.
13. Remove the J 45268-13 from the A/C suction line.
14. If you will reinstall the removed A/C compressor, perform the following procedure: Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. IMPORTANT: Rotating the compressor hub assembly when adding PAG oil to the A/C compressor suction port will draw the PAG oil into the crankcase chamber and prevent overflow. Add the total system capacity of PAG oil into the suction port of the A/C compressor while slowly rotating the A/C compressor hub assembly. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) . IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system. Add one bottle of J 41447 fluorescent dye directly into the A/C compressor suction port while slowly rotating the A/C compressor hub assembly.
15. Install the A/C compressor. Refer to «Compressor Replacement (LY7 )»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Compressor Replacement (LH2 - Heavy Duty Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__compressor-replacement-lh2-heavy-duty) or «Compressor Replacement (LH2 - Standard Cooling)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
16. Remove the auxiliary evaporator core outlet line to auxiliary evaporator core nut.
17. Disconnect the auxiliary evaporator core outlet line from the auxiliary evaporator core.
18. Remove the auxiliary evaporator core inlet line to auxiliary evaporator core nut.
19. Disconnect the auxiliary evaporator core inlet line to the auxiliary evaporator core. Tighten: Tighten the nut to 9 N.m (80 lb in).
20. Remove the auxiliary TXV assembly mounting bolts.
21. Remove the auxiliary TXV assembly.
22. Remove J 45268-111 from the auxiliary TXV assembly.
23. Inspect the auxiliary TXV for debris. Clean or replace as necessary.
24. Install the auxiliary TXV and auxiliary HVAC module back into the vehicle. Refer to «Thermal Expansion Valve Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
25. Remove and inspect the front TXV assembly for debris. Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Clean or replace as necessary.
26. Install the front TXV. Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
27. Replace the desiccant bag. Refer to «Desiccant Bag Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
28. Evacuate and recharge the A/C System. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
29. Leak test the fittings using J 42220 . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Draining Procedure

1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container. Rotate the compressor shaft to assist in draining the compressor.
2. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
3. Properly discard the used refrigerant oil.

Balancing Procedure

1. The Denso replacement compressor is shipped with 74 ml (2.5 oz) of refrigerant.
2. Before installing the compressor, the refrigerant oil will have to be fully drained.
3. Add back the same quantity of polyalkylene glycol (PAG) oil as drained from the removed compressor. Refer to the amount of refrigerant oil recorded during the compressor removal.

Tools Required

J 39400-A Halogen Leak Detector. See Special Tools .

Removal Procedure

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Intake Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-36l-ly7-introduction-2-of-2) in Engine Controls - 3.6L.
3. Disconnect the drive belt from the A/C compressor. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L.
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
5. Remove the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
6. Remove the LH front splash shield retainers.
7. Remove the LH front splash shield (1).
8. Remove the discharge line bolt from the A/C compressor.
9. Disconnect the discharge line from the A/C compressor.
10. Remove and discard the O-ring.
11. Remove the suction line bolt from the A/C compressor.
12. Disconnect the suction line from the A/C compressor.
13. Remove and discard the O-ring.
14. Disconnect the A/C compressor electrical connector.
15. Remove the A/C compressor mounting bolts.
16. Remove the A/C compressor.
17. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
18. Lower the vehicle.
19. If replacing the A/C compressor, balance the compressor. Refer to «Compressor Oil Balancing»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

Installation Procedure

1. Install the A/C compressor.
2. Raise the vehicle.
3. Install the A/C compressor mounting bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
4. Connect the A/C compressor electrical connector.
5. Install a new O-ring to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
6. Connect the discharge line to the A/C compressor.
7. Install the discharge line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
8. Install a new O-ring to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
9. Connect the suction line to the A/C compressor.
10. Install the suction line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
11. Install the LH front splash shield (1).
12. Install the LH front splash shield retainers.
13. Install the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
14. Lower the vehicle.
15. Connect the drive belt to the A/C compressor. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L.
16. Install the air cleaner outlet duct. Refer to «Air Cleaner Intake Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-36l-ly7-introduction-2-of-2) in Engine Controls - 3.6L.
17. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
18. Leak test the fittings of the component using the J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Compressor Replacement (LH2 - Heavy Duty Cooling)

Tools Required

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 41240-5A Fan Clutch Wrench

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L.
3. Remove the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L.
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
5. Remove the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
6. Remove the LH front splash shield retainers.
7. Remove the LH front splash shield (1).
8. Remove the front air deflector retainers.
9. Remove the front air deflector.
10. Remove the suction line bolt from the A/C compressor.
11. Disconnect the suction line from the A/C compressor.
12. Remove and discard the O-ring.
13. Remove the discharge line bolt from the A/C compressor.
14. Disconnect the discharge line from the A/C compressor.
15. Remove and discard the O-ring.
16. Disconnect the A/C compressor electrical connector.
17. Remove the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-2-of-5) in Engine Mechanical - 4.6L.
18. Remove the A/C compressor mounting bolts.
19. Lower the vehicle.
20. Loosen the fan nut from the crank adapter shaft using J 41240-5A .
21. Disconnect the fan from the crank adapter shaft and gently reposition the fan aside.
22. Remove the A/C compressor.
23. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
24. If replacing the A/C compressor, balance the compressor. Refer to «Compressor Oil Balancing»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Install the A/C compressor.
2. Connect the fan from the crank adapter shaft.
3. Tighten the fan nut to the crank adapter shaft using J 41240-5A . Tighten: Tighten the nut to 100 N.m (74 lb ft).
4. Raise the vehicle.
5. Install the A/C compressor mounting bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
6. Install the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-2-of-5) in Engine Mechanical - 4.6L.
7. Connect the A/C compressor electrical connector.
8. Install a new O-ring to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
9. Connect the discharge line to the A/C compressor.
10. Install the discharge line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
11. Install a new O-ring to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
12. Connect the suction line to the A/C compressor.
13. Install the suction line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
14. Install the front air deflector.
15. Install the front air deflector retainers.
16. Install the LH front splash shield (1).
17. Install the LH front splash shield retainers.
18. Install the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
19. Lower the vehicle.
20. Install the drive tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L.
21. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L.
22. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
23. Leak test the fittings of the component using the J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L.
3. Remove the drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L.
4. Disconnect the cooling fan electrical connectors.
5. Disengage the surge tank inlet hose from the retaining features on the cooling fan shroud and reposition aside.
6. Remove the cooling fan shroud to radiator retaining bolts.
7. Remove power steering line to cooling fan shroud retaining bolts.
8. Disconnect the A/C line from the cooling fan shroud retainer clip.
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
10. Remove the front air deflector retainers.
11. Remove the front air deflector.
12. Disconnect the engine wiring harness from the engine frame and reposition.
13. Remove the transmission oil cooler lines to cooling fan shroud retaining bolts.
14. Remove the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
15. Remove the LH front splash shield retainers.
16. Remove the LH front splash shield (1).
17. Remove the suction line bolt from the A/C compressor.
18. Disconnect the suction line from the A/C compressor.
19. Remove and discard the O-ring.
20. Remove the discharge line bolt from the A/C compressor.
21. Disconnect the discharge line from the A/C compressor.
22. Remove and discard the O-ring.
23. Disconnect the A/C compressor electrical connector.
24. Remove the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-2-of-5) in Engine Mechanical - 4.6L.
25. Remove the A/C compressor mounting bolts.
26. Lower the vehicle.
27. Remove the cooling fan assembly.
28. Remove the A/C compressor.
29. Replace the desiccant bag if the following conditions exist. Refer to «Desiccant Bag Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) . Color of PAG oil is brown or black Presence of foreign substances
30. If replacing the A/C compressor, balance the compressor. Refer to «Compressor Oil Balancing»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Install the A/C compressor.
2. Install the cooling fan assembly.
3. Raise the vehicle.
4. Install the A/C compressor mounting bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
5. Install the engine oil filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-2-of-5) in Engine Mechanical - 4.6L.
6. Connect the A/C compressor electrical connector.
7. Install a new O-ring to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
8. Connect the discharge line to the A/C compressor.
9. Install the discharge line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
10. Install a new O-ring to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
11. Connect the suction line to the A/C compressor.
12. Install the suction line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
13. Install the LH front splash shield (1).
14. Install the LH front splash shield retainers.
15. Install the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
16. Install the transmission oil cooler lines to cooling fan shroud retaining bolts. Tighten: Tighten the bolts to 6.5 N.m (58 lb in).
17. Connect the engine wiring harness to the engine frame.
18. Install the front air deflector.
19. Install the front air deflector retainers.
20. Lower the vehicle.
21. Connect the A/C line to the cooling fan shroud retainer clip.
22. Install power steering line to cooling fan shroud retaining bolts. Tighten: Tighten the bolts to 6.5 N.m (58 lb in).
23. Install the cooling fan shroud to radiator retaining bolts. Tighten: Tighten the bolts to 6.5 N.m (58 lb in).
24. Connect the cooling fan electrical connectors.
25. Engage the surge tank inlet hose to the retaining features on the cooling fan shroud.
26. Install the drive belt. Refer to «Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-46l-lh2-1-of-5) in Engine Mechanical - 4.6L.
27. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L.
28. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
29. Leak test the fittings of the component using the J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Disassemble the A/C refrigerant components. Refer to the appropriate repair procedure For compression style fittings use a back up wrench on the fitting (2) and loosen the fitting nut (1). For banjo style fittings remove the bolt retaining the banjo type fitting.
2. Remove the O-ring seal from the A/C refrigerant component.
3. Inspect the O-ring seal for signs of damage to help determine the root cause of the failure.
4. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.
5. Cap or tape the A/C refrigerant components.
6. Discard the O-ring seal.

1. Inspect the new O-ring seal for any sign or cracks, cuts, or damage. Replace if necessary.
2. Remove the cap or tape from the A/C refrigerant components.
3. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant components.
4. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
5. Carefully slide the new O-ring seal onto the A/C refrigerant component.
6. The O-ring seal must be fully seated.
7. Assemble the A/C components. Refer to the appropriate repair procedure. For compression style fittings use a back up wrench on the fitting (2) and tighten the fitting nut (1) to specification. For banjo style fittings install the bolt retaining the banjo type fitting and tighten to specification.

A/C Line/Tube Connector Removal/Replacement

Tools Required

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Locate the A/C quick connect fitting locking tab access slots (1).
3. Carefully insert J 45689 into the locking tab access slots. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
4. Gently press down on the locking tab until the quick connect fitting locking tab releases.
5. Open and remove the quick connect fitting from the A/C refrigerant component.

1. Install the A/C quick connect fitting to the A/C refrigerant component.
2. Close the A/C quick connect fitting.
3. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
4. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Connect Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner intake duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L or «Air Cleaner Intake Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-36l-ly7-introduction-2-of-2) in Engine Controls - 3.6L.
3. Remove the quick connect fitting at the condenser tube. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
4. Disconnect the condenser tube from the radiator mounting clip.
5. Disconnect the condenser tube from the A/C liquid line.
6. Remove and discard the O-rings on the A/C liquid line.
7. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
8. Remove the front air deflector retainers.
9. Remove the front air deflector.
10. Remove the condenser tube bolt.
11. Disconnect the condenser tube from the condenser.
12. Remove and discard the O-ring.
13. Disconnect the high pressure sensor electrical connector.
14. Remove the condenser tube.
15. Remove the high pressure sensor.

1. Install the high pressure sensor. Tighten: Tighten the sensor to 9.8 N.m (87 lb in).
2. Install the condenser tube.
3. Connect the high pressure sensor electrical connector.
4. Install a new O-ring to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
5. Connect the condenser tube to the condenser.
6. Install the condenser tube bolt. Tighten: Tighten the sensor to 9 N.m (80 lb in).
7. Install the front air deflector.
8. Install the front air deflector retainers.
9. Lower the vehicle.
10. Install new O-rings on the A/C liquid line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
11. Connect the condenser tube to the A/C liquid line.
12. Connect the condenser tube from the radiator mounting clip.
13. Install the condenser tube quick connect fitting. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
14. Install the air cleaner intake duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L or «Air Cleaner Intake Duct Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-36l-ly7-introduction-2-of-2) in Engine Controls - 3.6L.
15. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
16. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the front air deflector retainers.
4. Remove the front air deflector.
5. Remove the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
6. Remove the LH front splash shield retainers.
7. Remove the LH front splash shield (1).
8. Remove the suction line bolt from the A/C compressor.
9. Disconnect the suction line from the A/C compressor.
10. Remove and discard the O-ring.
11. Remove the discharge line bolt from the A/C compressor.
12. Disconnect the discharge line from the A/C compressor.
13. Remove and discard the O-ring.
14. Remove the discharge line to condenser bolt.
15. Disconnect the discharge line from the condenser.
16. Remove and discard the O-ring.
17. Disconnect the push-pin retainer from the front bumper and reposition the air baffle aside.
18. Remove the discharge line.

1. Install the discharge line.
2. Connect the push-pin retainer to the front bumper.
3. Install a new O-ring to the discharge line at the condenser. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
4. Connect the discharge line to the condenser.
5. Install the discharge line to condenser bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
6. Install a new O-ring to the discharge line at the A/C compressor. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
7. Connect the discharge line to the A/C compressor.
8. Install the discharge line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
9. Install a new O-ring to the suction line at the A/C compressor. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
10. Connect the suction line to the A/C compressor.
11. Install the suction line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
12. Install the LH front splash shield (1).
13. Install the LH front splash shield retainers.
14. Install the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
15. Remove the front air deflector retainers.
16. Install the front air deflector.
17. Install the front air deflector retainers.
18. Lower the vehicle.
19. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
20. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the front air deflector retainers.
4. Remove the front air deflector.
5. Remove the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
6. Remove the discharge line bolt from the A/C compressor.
7. Disconnect the discharge line from the A/C compressor.
8. Remove the discharge line to condenser bolt.
9. Disconnect the discharge line from the condenser.
10. Remove the discharge line.
11. Remove and discard the discharge line O-rings.

1. Install new O-rings to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the discharge line.
3. Connect the discharge line to the condenser.
4. Install the discharge line to condenser bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
5. Connect the discharge line to the A/C compressor.
6. Install the discharge line bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
7. Install the LH front wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/srx/i-2003-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
8. Remove the front air deflector retainers.
9. Install the front air deflector.
10. Install the front air deflector retainers.
11. Lower the vehicle.
12. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
13. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Suction Hose Replacement (LY7 w/o C57)

Tools Required

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner intake duct. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 3.6L.
3. Disconnect the drive belt from the A/C compressor. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L.
4. Remove the suction hose retaining bolt from the A/C compressor.
5. Disconnect the suction hose from the A/C compressor.
6. Remove the suction hose retaining screw from the clamp.
7. Separate the suction hose from the clamp.
8. Remove the suction hose quick connect fitting (1). Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
9. Disconnect the suction hose from the thermal expansion valve (TXV) suction tube.
10. Remove the suction hose from the vehicle.
11. Remove and discard the O-rings from the suction hose.

1. Install new O-rings onto the suction hose. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the suction hose.
3. Connect the suction hose to the TXV suction tube.
4. Install the suction hose quick connect fitting (1). Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
5. Position the suction hose into the clamp.
6. Install the suction hose retaining screw into the clamp. Tighten: Tighten the screw to 2 N.m (18 lb in).
7. Connect the suction hose to the A/C compressor.
8. Install the suction hose retaining bolt to the A/C compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
9. Connect the drive belt to the A/C compressor. Refer to «Drive Belt Replacement - Power Steering and Air Conditioning»(/cadillac/srx/i-2003-2009/remont/mechanical/#engine-mechanical-36l-ly7-1-of-5) in Engine Mechanical - 3.6L.
10. Install the air cleaner intake duct. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 3.6L.
11. Evacuate and recharge the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
12. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Suction Hose Replacement (LH2 w/o C57)

Tools Required

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the suction hose quick connect fitting. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
3. Remove the suction hose retaining screw from the clamp.
4. Separate the suction line from the clamp.
5. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls-4.6L.
6. Remove the suction hose retaining bolt from the compressor.
7. Remove the suction hose from the vehicle.

1. Coat the new O-rings with refrigerant oil. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the suction hose.
3. Connect the suction hose to the suction pipe.
4. Install the suction hose quick connect fitting. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
5. Position the suction hose into the bracket.
6. Install the suction hose retaining screw into the bracket. Tighten: Tighten the screw to 2 N.m (18 lb in).
7. Connect the suction hose to the compressor.
8. Install the retaining bolt to the compressor. Tighten: Tighten the bolt to 9 N.m (80 lb in).
9. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls - 4.6L.
10. Evacuate and recharge the refrigerant system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
11. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Connect Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant from the system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the liquid line. Refer to «Liquid Line Replacement (w/C57)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
3. Remove the suction line clamp screw from the strut tower.
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
5. Remove the suction line quick connect fitting from the mid-section A/C lines. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
6. Lower the vehicle.
7. Remove the suction line quick connect fitting from the strut tower bracket. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
8. Remove the suction line quick connect fitting (1) from the evaporator. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
9. Remove the suction line from the vehicle.
10. Remove and discard the O-rings from the suction line.

1. Install new O-rings to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the suction line to the vehicle.
3. Install a quick connect fitting (1) to the suction line at the evaporator. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
4. Install a quick connect fitting to the suction line at the strut tower. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
6. Install a quick connect fitting to the suction line at the mid-section A/C lines. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
7. Lower the vehicle.
8. Install the suction clamp screw to the strut tower. Tighten: Tighten the screw to 1 N.m (9 lb in).
9. Install the liquid line. Refer to «Liquid Line Replacement (w/C57)»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
10. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
11. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Connect Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant from the system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls-4.6L.
3. Remove the surge tank. Refer to «Surge Tank Replacement»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
4. Disconnect the electrical connector from the wiper motor.
5. Disconnect the engine harness electrical connector.
6. Remove the surge tank outlet hose bracket nuts from the cowl.
7. Reposition the surge tank outlet hose.
8. Remove the brake booster. Refer to «Vacuum Brake Booster Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
10. Remove the liquid line quick connect fitting from the condenser tube. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
11. Disconnect the liquid line from the condenser tube.
12. Remove the liquid line quick connect fitting (1) from the evaporator. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
13. Disconnect the liquid line from the evaporator.
14. Remove and discard the O-rings from the liquid line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Install new O-rings to the liquid line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Connect the liquid line to the evaporator.
3. Install a quick connect fitting (1) to the liquid line at the evaporator. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
4. Connect the liquid line to the condenser tube.
5. Install a quick connect fitting to the liquid line at the condenser. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
6. Install the brake booster. Refer to «Vacuum Brake Booster Replacement»(/cadillac/srx/i-2003-2009/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
7. Reposition the surge tank outlet hose to the installed position.
8. Install the surge tank outlet hose bracket nuts to the cowl. Tighten: Tighten the nuts to 9 N.m (80 lb in).
9. Connect the engine harness electrical connector.
10. Connect the electrical connector to the wiper motor.
11. Install the surge tank. Refer to «Surge Tank Replacement»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) in Engine Cooling.
12. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/testing-diagnostics/#engine-control-system-46l-lh2-introduction-2-of-2) in Engine Controls-4.6L.
13. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
14. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 43244 Relay Puller Pliers

1. Remove the electrical center cover.
2. Locate the compressor relay. Refer to «Electrical Center Identification Views»(/cadillac/srx/i-2003-2009/remont/electrical-component-locations/#wiring-systems-component-views) in Wiring Systems to locate the electrical center where the compressor relay exists.
3. Using J 43244 (1) position the tool on opposing corners of the compressor relay (2).
4. Remove the compressor relay (2) from the electrical center.

1. Install the compressor relay (2) in the same position as removed.
2. Install the electrical center cover.

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the front air deflector retainers.
4. Remove the front air deflector.
5. Remove the desiccant bag plug (1).
6. Remove the desiccant bag (1).

1. Install the desiccant bag (1).
2. Lubricate the O-ring on the desiccant bag plug. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
3. Install the desiccant bag plug (1). Tighten: Tighten the plug to 2.9 N.m (26 lb in).
4. Install the front air deflector.
5. Install the front air deflector retainers.
6. Lower the vehicle.
7. Add the proper amount of oil. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
8. Evacuate and recharge the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
9. Leak test the fittings of the component with J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
3. Remove the insulation (1) from the thermal expansion valve (TXV).
4. Remove the HVAC line clamp screw.
5. Remove the HVAC line clamp.
6. Remove the TXV to evaporator bolts.
7. Remove the TXV line bracket.
8. Remove the TXV from the evaporator core.
9. Disconnect the TXV from the A/C lines by pulling straight out.
10. Remove the TXV.
11. Remove and discard all O-rings

1. Install new O-rings. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the A/C lines into the TXV.
3. Install the TXV onto the evaporator core.
4. Install the TXV line bracket.
5. Install the TXV to evaporator bolts. Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
6. Install the HVAC line clamp.
7. Install the HVAC line clamp screw. Tighten: Tighten the screw to 1 N.m (9 lb in).
8. Install the insulation (1) onto the lines and TXV.
9. Install the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
10. Evacuate the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
11. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the front air deflector retainers.
4. Remove the front air deflector.
5. Disconnect the electrical connector (1) from the A/C refrigerant pressure sensor (2).
6. Remove the A/C refrigerant pressure sensor.

1. Install a new O-ring to the refrigerant pressure sensor. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the A/C refrigerant pressure sensor (2). Tighten: Tighten the sensor to 9.8 N.m (87 lb in).
3. Connect the electrical connector (1) to the A/C refrigerant pressure sensor.
4. Install the front air deflector.
5. Install the front air deflector retainers.
6. Lower the vehicle.
7. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
8. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Remove the power steering cooler mounting bolts. Refer to «Power Steering Cooler Replacement (LY7 W/O V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (LH2 or LY7 with V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) in Power Steering System.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
4. Remove the front air deflector retainers.
5. Remove the front air deflector.
6. Remove the lower air baffle push pin retainers.
7. Remove the condenser upper bracket bolts.
8. Remove the condenser lower mounting bolts.
9. Remove the discharge line bolt.
10. Disconnect the discharge line from the condenser.
11. Remove and discard the O-ring.
12. Remove the condenser tube bolt.
13. Disconnect the condenser tube from the condenser.
14. Remove and discard the O-ring.
15. Reposition the power steering cooler.
16. Remove the condenser.

1. If replacing the condenser, add the specified amount of PAG oil directly to the condenser. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
2. Install the condenser.
3. Reposition the power steering cooler into position.
4. Install a new O-ring to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
5. Connect the condenser tube to the condenser.
6. Install the condenser tube bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
7. Install a new O-ring to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
8. Connect the discharge line to the condenser.
9. Install the discharge line bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
10. Install the condenser lower mounting bolts. Tighten: Tighten the bolts to 5.4 N.m (48 lb in).
11. Remove the condenser upper bracket bolts. Tighten: Tighten the bolts to 5.4 N.m (48 lb in).
12. Install the lower air baffle push pin retainers.
13. Install the front air deflector.
14. Install the front air deflector retainers.
15. Lower the vehicle.
16. Install the power steering cooler mounting bolts. Refer to «Power Steering Cooler Replacement (LY7 W/O V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (LH2 or LY7 with V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) in Power Steering System.
17. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
18. Leak test the fittings of the component using the J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the front air deflector retainers.
4. Remove the front air deflector.
5. Remove the lower air baffle push pin retainers.
6. Remove the condenser upper bracket bolts.
7. Remove the condenser lower mounting bolts.
8. Remove the discharge line bolt.
9. Disconnect the discharge line from the condenser.
10. Remove and discard the O-ring.
11. Remove the condenser tube bolt.
12. Disconnect the condenser tube from the condenser.
13. Remove and discard the O-ring.
14. Remove the power steering cooler line to condenser retaining bolts.
15. Remove the condenser.

1. If replacing the condenser, add the specified amount of PAG oil directly to the condenser. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
2. Install the condenser.
3. Install the power steering cooler line to condenser retaining bolts. Tighten: Tighten the bolt to 9 N.m (80 lb in).
4. Install a new O-ring to the condenser tube. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
5. Connect the condenser tube to the condenser.
6. Install the condenser tube bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
7. Install a new O-ring to the discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
8. Connect the discharge line to the condenser.
9. Install the discharge line bolt. Tighten: Tighten the bolt to 9 N.m (80 lb in).
10. Install the condenser lower mounting bolts. Tighten: Tighten the bolts to 5.4 N.m (48 lb in).
11. Remove the condenser upper bracket bolts. Tighten: Tighten the bolts to 5.4 N.m (48 lb in).
12. Install the lower air baffle push pin retainers.
13. Install the front air deflector.
14. Install the front air deflector retainers.
15. Lower the vehicle.
16. Install the power steering cooler mounting bolts. Refer to «Power Steering Cooler Replacement (LY7 W/O V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (LH2 or LY7 with V92)»(/cadillac/srx/i-2003-2009/remont/manual-power-steering/#power-steering-system) in Power Steering System.
17. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
18. Leak test the fittings of the component using the J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. J 39400-A Halogen Leak Detector. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .
2. J 45689 A/C Quick Joint Tool. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Drain the coolant. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.
4. Disconnect the inlet heater hose from the heater core. Refer to «Heater Hose Replacement - Inlet»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
5. Disconnect the outlet heater hose from the heater core. Refer to «Heater Hose Replacement - Outlet»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
6. Remove the quick connect fitting (1) from the liquid line. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
7. Disconnect the A/C liquid line from the evaporator.
8. Remove and discard the O-rings.
9. Remove the quick connect fitting (1) from the suction line. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
10. Disconnect the A/C suction line from the evaporator.
11. Remove and discard the O-rings.
12. Remove the instrument panel (I/P) carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
13. Remove the air inlet assembly.
14. Disconnect the HVAC module electrical connector.
15. Disconnect the HVAC module drain tube (2) from the floor.
16. Press the tab and release the left rear duct from the HVAC module.
17. Position the left rear heater duct away from the HVAC module.
18. Press the tab and release the right rear duct from the HVAC module.
19. Position the right rear heater duct away from the HVAC module.
20. Remove the lower left HVAC module mounting nut (1).
21. Remove the upper left HVAC module mounting nut (1).
22. Remove the HVAC module from the vehicle.
23. Remove the foam seals from the A/C evaporator lines.
24. Remove the foam seals from the heater core pipes.

1. Install new foam seals onto the heater core pipes.
2. Install new foam seals onto the A/C evaporator lines.
3. Install the HVAC module into the vehicle.
4. Install the upper left HVAC module mounting nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
5. Install the lower left HVAC module mounting nut (1). Tighten: Tighten the nut to 9 N.m (80 lb in).
6. Connect the rear heater ducts to the HVAC module.
7. Connect the drain tube to the bottom of the HVAC module.
8. Connect the drain tube (2) to the floor.
9. Connect the HVAC electrical connector.
10. Install the air inlet assembly.
11. Install the I/P carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
12. Install new O-rings to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
13. Install the A/C suction line to the evaporator.
14. Install the quick connect fitting (1) to the suction line. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
15. Install new O-rings to the suction line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
16. Install the A/C liquid line to the evaporator.
17. Install the quick connect fitting (1) to the liquid line. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
18. Connect the inlet heater hose to the heater core. Refer to «Heater Hose Replacement - Inlet»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
19. Connect the outlet heater hose to the heater core. Refer to «Heater Hose Replacement - Outlet»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
20. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
21. Fill the coolant. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.
22. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
23. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Remove the thermal expansion valve. Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Remove the HVAC module case screws.
3. Remove the HVAC module retainer clips.
4. Disconnect the HVAC Module wiring harness (1) from the RH temperature actuator and reposition the wiring harness aside.
5. Disconnect and reposition the evaporator core temperature sensor connector (2) and reposition aside.
6. Separate the HVAC module.
7. Remove the evaporator core.
8. Remove the thermistor from the evaporator core.

1. Add refrigerant oil to the evaporator core. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
2. Install the new evaporator core seals to evaporator.
3. Install the thermistor to the evaporator.
4. Install the evaporator core.
5. Connect the HVAC module case halves together.
6. Reposition and connect the evaporator core temperature sensor connector (2).
7. Reposition and connect the HVAC Module wiring harness (1) to the RH temperature actuator.
8. Install the HVAC module retainer clips.
9. Install the HVAC module case screws. Tighten: Tighten the screws to 1 N.m (9 lb in).
10. Install the thermal expansion valve. Refer to «Thermal Expansion Valve Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Remove the center console. Refer to «Console Replacement - Front Floor»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Remove the rubber adhesive patch (1) from around the drain tube (2).
3. Open the flap in the tunnel insulator and unsnap drain fitting from the tunnel sheet metal.
4. Remove the HVAC module drain tube from the HVAC module.

1. Install the HVAC module drain tube to the HVAC module.
2. Ensure that the drain tube is fully seated to the HVAC module.
3. Snap drain fitting into the tunnel sheet metal.
4. Close the flap on the tunnel insulator.
5. Install the rubber adhesive patch (1) around the drain tube (2).
6. Install the center console. Refer to «Console Replacement - Front Floor»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

J 38185 Hose Clamp Pliers

1. Drain the cooling system. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.
2. Remove the battery tray. Refer to «Battery Tray Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Remove the cowl panel retaining bolts.
4. Remove the cowl panel.
5. Using J 38185 slide the clamp away from the base of the heater inlet hose.
6. Remove the inlet heater hose from the heater core.
7. Using J 38185 slide the clamp away from the base of the heater inlet hose.
8. Remove the clamp and hose from the engine cooling thermostat assembly.

1. Install the inlet heater hose to the engine cooling thermostat assembly.
2. Using J 38185 slide the clamp back into the original position on the hose.
3. Install the inlet heater hose to the heater core.
4. Using J 38185 slide the clamp back into the original position on the hose.
5. Install the cowl panel.
6. Install the cowl panel retaining bolts. Tighten: Tighten the bolts to 6 N.m (13 lb ft).
7. Install the battery tray. Refer to «Battery Tray Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
8. Fill the cooling system. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.

J 38185 Hose Clamp Pliers

1. Drain the cooling system. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.
2. Remove the battery tray. Refer to «Battery Tray Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Remove the cowl panel retaining bolts.
4. Remove the cowl panel.
5. Using J 38185 slide the hose clamp away from the base of the heater hose.
6. Remove the outlet heater hose from the engine cooling thermostat assembly.
7. Using J 38185 , slide the hose clamp away from the base of the heater hose.
8. Remove the heater outlet hose from the heater core.
9. Remove the heater outlet hose.

1. Position the outlet heater hose assembly into the vehicle.
2. Install the outlet hose to the heater core.
3. Using J 38185 slide the hose clamp back into the original position on the hose.
4. Install the outlet hose to the engine cooling thermostat assembly.
5. Using J 38185 slide the hose clamp back into the original position on the hose.
6. Install the cowl panel.
7. Install the cowl panel retaining bolts. Tighten: Tighten the bolts to 6 N.m (13 lb ft).
8. Install the battery tray. Refer to «Battery Tray Replacement»(/cadillac/srx/i-2003-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
9. Fill the cooling system. Refer to «Draining and Filling Cooling System (Static Fill)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system) or «Draining and Filling Cooling System (GE 47716)»(/cadillac/srx/i-2003-2009/remont/cooling-system-mechanical/#engine-cooling-system__draining-and-filling-cooling-system-ge) in Engine Cooling.

1. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
2. With two hands release the tabs on each side of the access cover.
3. Lift up and remove the filter access cover (1).
4. Remove the filter (1) from the filter housing.
5. Gently pry out on the filter housing to separate the housing from the sheet metal.
6. Remove the passenger air filter housing (1).

1. Install the passenger air filter housing (1).
2. Press the passenger air filter housing until all clips engage into the sheet metal.
3. Ensure that there is a good seal between the passenger air filter housing and the sheet metal.
4. Install the filter (1) in to the filter housing.
5. Install the filter access cover (1).
6. Install the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.

1. Remove the air inlet grille access panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
2. With two hands release the tabs on each side of the access cover.
3. Lift up and remove the filter access cover (1).
4. Remove the filter (1) from the filter housing.

1. Install the filter (1) in to the filter housing.
2. Install the filter access cover (1).
3. Install the air inlet grille access panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/srx/i-2003-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.

1. Remove the instrument panel (I/P) compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) Instrument Panel, Gages, and Console.
2. Remove the closeout panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
3. Remove the upper air inlet assembly bolts (1).
4. Remove the lower right air inlet assembly bolt (1).
5. Slide the assembly to the right and then lower.
6. Disconnect the air inlet assembly electrical connector (1).
7. Rotate the air inlet assembly (1) and remove.

1. Connect the air inlet assembly electrical connector (1).
2. Install the air inlet assembly (1) to the locator pin.
3. Install the upper air inlet assembly bolts (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
4. Install the lower right air inlet assembly bolt (1). Tighten: Tighten the bolt to 9 N.m (80 lb in).
5. Install the I/P compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
6. Install the closeout panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.

1. Remove the right closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Remove the instrument panel (I/P) compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
3. Disconnect the blower motor electrical connector.
4. Disconnect the blower motor processor electrical connector.
5. Remove the screws (1) that retain the blower motor.
6. Remove the blower motor.

1. Install the blower motor.
2. Install the blower motor screws (1). Tighten: Tighten the screws to 1.5 N.m (13 lb in).
3. Connect the blower motor processor electrical connector.
4. Connect the blower motor electrical connector.
5. Install the I/P compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
6. Install the right closeout insulator panel. Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

1. Using a small flat bladed tool, insert between the air vent and the I/P retainer.
2. Pry out in order to release the retainer securing the air vent.

1. Position the air vent onto the I/P.
2. Push the air vent into the I/P in order to secure.

1. Pull out on the center I/P vent assembly in order to release the fasteners securing the vent to the I/P.
2. Disconnect the hazard switch electrical connector.
3. Remove the vent from the I/P.

1. Connect the hazard switch connector.
2. Position hazard switch wire harness (1) in the harness retainers.
3. Push the wire service loop forward between the duct as the vent is positioned on the I/P.
4. Overlap the vent housing over the duct.
5. Position the vent into the I/P. IMPORTANT: Ensure that the wire harness is not interfering with the moving parts of the vent.
6. Push the vent in to the I/P in order to seat the retainers.

1. Using a small flat bladed tool, insert between the air vent and the I/P retainer.
2. Pry out in order to release the retainer securing the air vent.

1. Position the air vent onto the I/P.
2. Push the air vent into the I/P in order to secure.

1. Remove the instrument panel (I/P) retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Remove the dash insulator (1).
3. Disconnect the wiring harness from the air duct.
4. Remove the screws (1) that retain the air duct.
5. Remove the left air duct (2), by unsnapping the duct from the HVAC module.

1. Install the left air duct (2), by pressing down until you hear the tabs engage on the HVAC module.
2. Install the air outlet duct screws (1). Tighten: Tighten the screws to 2 N.m (18 lb in).
3. Connect the wiring harness to the air duct.
4. Install the dash insulator (1).
5. Install the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

1. Remove the instrument panel (I/P) retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Remove the dash insulator (1).
3. Disconnect the wiring harness from the air duct (1).
4. Remove the screws (1) that retain the air duct (2).
5. Remove the right air duct (2), by releasing the tabs from the module.

1. Install the right air duct (2), by pressing down until you hear the tabs engage on the HVAC module.
2. Install the right air duct screws (1). Tighten: Tighten the screws to 2 N.m (18 lb in).
3. Connect the wiring harness to the air duct (1).
4. Install the dash insulator (1).
5. Install the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

1. Remove the instrument panel (I/P) carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Press in on the tab to release the defroster duct (1) from the HVAC module.
3. Remove the defroster duct (1).

1. Install the defroster duct (1).
2. Press down on the defroster duct (1) until you hear the tabs engage.
3. Install the I/P carrier. Refer to «Instrument Panel (I/P) Carrier Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

1. Remove the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Disconnect the wiring (1) from the duct.
3. Press the tab to release the duct from the HVAC module.
4. Disconnect the duct from the module.
5. Remove the air outlet duct (1).

1. Install the air outlet duct (1).
2. Connect air outlet duct to the HVAC module.
3. Connect the wiring (1) to the duct.
4. Install the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

1. Remove the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Disconnect the wiring from the duct.
3. Press the tab to release the duct from the module.
4. Disconnect the duct from the module.
5. Remove the air outlet duct.

1. Install the air outlet duct.
2. Connect the duct to the module.
3. Connect the wiring to the duct.
4. Install the front carpet. Refer to «Carpet Replacement - Front»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

1. Remove the HVAC module. Refer to «HVAC Module Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Remove the heater core pipe bracket screw.
3. Remove the heater core pipe bracket.
4. Remove the heater core out of the HVAC module.

1. Install the heater core into the HVAC module.
2. Install the heater core pipe bracket.
3. Install the heater core pipe bracket screw. Tighten: Tighten the screws to 1 N.m (9 lb in).
4. Install the HVAC module. Refer to «HVAC Module Assembly Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Remove the left body side trim access panel.
2. Disconnect the electrical connector from the blower motor resistor.
3. Remove the blower motor resistor screws from the HVAC module.
4. Remove the blower motor resistor from the vehicle.

1. Install the blower motor resistor.
2. Install the blower motor resistor screws. Tighten: Tighten the screws to 1 N.m (9 lb in).
3. Connect the electrical connector to the blower motor resistor.
4. Install the left body side trim access panel.

1. Remove the left body side trim access panel.
2. Disconnect the blower motor electrical connector.
3. Remove the blower motor screws from the HVAC module.
4. Remove the blower motor from the HVAC module.

1. Install the blower motor to the HVAC module.
2. Install the blower motor screws. Tighten: Tighten the screws to 1 N.m (9 lb in).
3. Connect the blower motor electrical connector.
4. Install the left body side trim access panel.

1. Remove the auxiliary evaporator from the auxiliary HVAC module. Refer to «Evaporator Core Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Remove the auxiliary thermal expansion valve (TXV) assembly bolts.
3. Remove the auxiliary TXV from the auxiliary evaporator.
4. Remove and discard the O-rings.

1. Install new O-rings to the auxiliary TXV assembly. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the auxiliary TXV to the evaporator.
3. Install the auxiliary TXV bolts to the auxiliary evaporator. Tighten: Tighten the bolt to 3.5 N.m (31 lb in).
4. Install the auxiliary evaporator to the auxiliary HVAC module. Refer to «Evaporator Core Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the refrigerant from the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Disconnect the LH muffler from the support hangers.
4. Remove the auxiliary evaporator inlet line nut from the auxiliary HVAC module at the underside of the vehicle.
5. Disconnect the auxiliary evaporator inlet line from the auxiliary evaporator.
6. Disconnect the auxiliary evaporator inlet line from the body retainer clip.
7. Remove and discard the O-ring.
8. Remove the auxiliary evaporator outlet line nut from the auxiliary HVAC module at the underside of the vehicle.
9. Disconnect the auxiliary evaporator outlet line from the auxiliary evaporator.
10. Disconnect the auxiliary evaporator outlet line from the body retainer clip.
11. Remove and discard the O-ring.
12. Lower the vehicle.
13. Remove the left body side trim panel. Refer to «Trim Panel Replacement - Body Side Rear (w/o TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) or «Trim Panel Replacement - Body Side Rear (w/TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
14. Disconnect the electrical connectors from the auxiliary HVAC module.
15. Remove the air duct from the auxiliary HVAC module.
16. Remove the auxiliary HVAC module bolts from the vehicle.
17. Remove the auxiliary HVAC module from the vehicle.

1. Install the auxiliary HVAC module to the vehicle.
2. Install the auxiliary HVAC module bolts to the vehicle. Tighten: Tighten the bolts to 9 N.m (80 lb in).
3. Connect the electrical connectors to the auxiliary HVAC module.
4. Install the air duct to the auxiliary HVAC module.
5. Install the left body side trim panel. Refer to «Trim Panel Replacement - Body Side Rear (w/o TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) or «Trim Panel Replacement - Body Side Rear (w/TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
6. Raise the vehicle.
7. Install new O-rings to the auxiliary evaporator inlet and outlet lines. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
8. Install the auxiliary evaporator outlet line to the auxiliary HVAC module.
9. Connect the auxiliary evaporator inlet line to the body retainer clip.
10. Install the auxiliary evaporator outlet line nut to the auxiliary HVAC module. Tighten: Tighten the nut to 9 N.m (80 lb in).
11. Install the auxiliary evaporator inlet line to the auxiliary HVAC module.
12. Connect the auxiliary evaporator inlet line from the body retainer clip.
13. Install the auxiliary evaporator inlet line nut to the auxiliary HVAC module. Tighten: Tighten the nut to 9 N.m (80 lb in).
14. Lower the vehicle.
15. Connect the LH muffler to the support hangers.
16. Recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
17. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

1. Remove the auxiliary HVAC module from the vehicle. Refer to «HVAC Module Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Remove and discard the auxiliary HVAC module seals.
3. Remove the auxiliary HVAC module screws.
4. Separate the auxiliary HVAC module halves.
5. Remove the auxiliary evaporator from the auxiliary HVAC module.
6. Remove the auxiliary evaporator pipe assembly bolts from the evaporator.
7. Remove the auxiliary evaporator pipe assembly from the evaporator.
8. Remove and discard the O-rings.

1. If replacing the auxiliary evaporator core, add the specified amount of PAG oil directly into the auxiliary evaporator core. Refer to «Refrigerant System Capacities»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-system-capacities) .
2. Install new O-rings to the auxiliary TXV assembly. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
3. Install the auxiliary evaporator TXV assembly to the evaporator.
4. Install the auxiliary evaporator pipe assembly bolts to the evaporator. Tighten: Tighten the bolts to 3.5 N.m (31 lb in).
5. Install the auxiliary evaporator to the auxiliary HVAC module.
6. Connect the auxiliary HVAC module halves.
7. Install the auxiliary HVAC module screws. Tighten: Tighten the screws to 1 N.m (9 lb in).
8. Install new auxiliary HVAC module case joint seals.
9. Install the auxiliary HVAC module to the vehicle. Refer to «HVAC Module Replacement - Auxiliary»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the auxiliary front discharge line to front discharge line quick connect fitting. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
4. Disconnect the auxiliary front discharge line from the front discharge line.
5. Loosen the auxiliary front discharge line to auxiliary rear discharge line fitting.
6. Disconnect the auxiliary front discharge line from the auxiliary rear discharge line.
7. Disconnect the auxiliary front discharge line from the body retainers.
8. Remove the auxiliary front discharge line from the vehicle.
9. Remove and discard the O-rings from the auxiliary front discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .

1. Install new O-rings to the auxiliary front discharge line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the auxiliary front discharge line to the vehicle.
3. Connect the auxiliary front discharge line to the body retainers.
4. Connect the auxiliary front discharge line to the auxiliary rear discharge line.
5. Install the fitting of the auxiliary front discharge line. Tighten: Tighten the fitting to 9 N.m (80 lb in).
6. Connect the auxiliary front discharge line to the front discharge line.
7. Install the auxiliary front discharge line to front discharge line quick connect fitting. Refer to «A/C Line/Tube Connector Removal/Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__ac-linetube-connector-removalreplacement) .
8. Lower the vehicle.
9. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
10. Leak test the fittings of the component using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

J 39400-A Halogen Leak Detector. See Special Tools .

1. Recover the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/i-2003-2009/remont/hoistjack/#general-information) in General Information.
3. Remove the engine exhaust. Refer to «Exhaust System Replacement»(/cadillac/srx/i-2003-2009/remont/exhaust/#engine-exhaust-system__exhaust-system-replacement) in Engine Exhaust.
4. Remove the auxiliary rear liquid line nut from the auxiliary evaporator.
5. Disconnect the auxiliary rear liquid line from the auxiliary evaporator.
6. Loosen the auxiliary rear liquid line to the auxiliary front liquid line fitting (1).
7. Remove the auxiliary rear liquid line from the body retainers.
8. Remove the auxiliary rear liquid line from the vehicle.
9. Remove and discard the O-rings from the auxiliary rear liquid line.

1. Install new O-rings to the auxiliary rear liquid line. Refer to «O-Ring Replacement»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) .
2. Install the auxiliary rear liquid line to the vehicle.
3. Install the auxiliary rear liquid line to the body retainers.
4. Connect the rear auxiliary A/C line to the front auxiliary front liquid line.
5. Install the liquid line fitting (1). Tighten: Tighten the fitting to 9 N.m (80 lb in).
6. Connect the auxiliary rear liquid line to the auxiliary evaporator.
7. Install the auxiliary rear liquid line nut to the auxiliary evaporator. Tighten: Tighten the nut to 9 N.m (80 lb in).
8. Install the engine exhaust. Refer to «Exhaust System Replacement»(/cadillac/srx/i-2003-2009/remont/exhaust/#engine-exhaust-system__exhaust-system-replacement) in Engine Exhaust.
9. Lower the vehicle.
10. Recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) .
11. Leak test the fittings of the components using J 39400-A . See «Special Tools»(/cadillac/srx/i-2003-2009/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__special-tools) .

Special Tools

Special Tools Illustration Tool Number/ Description J 38185 Hose Clamp Pliers J 39400-A Halogen Leak Detector J 41240-5A Fan Clutch Wrench J 41447 R-134A A/C Tracer Dye - Box of 24 J 4220 Universal 12V Leak Detection Lamp J 43244 Relay Puller Pliers J 43600 ACR2000 Air Conditioning Service Center J 43872 Fluorescent Dye Cleaner J 45037 A/C Oil Injector J 45268 A/C Flush Adapter Kit J 45689 Quick Joint Tool J 46297 A/C Dye Injector Kit J 46297-12 Replacement Dye Cartridges

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

See also:
• Diagnostic System Check - Vehicle
• Symptoms - HVAC Systems - Automatic
• Moving Parts and Hot Surfaces Caution
• Cooling System Description and Operation
• Cooling Fan Inoperative
• HVAC Compressor Clutch Does Not Engage
• Drive Belt Excessive Wear Diagnosis
• Drive Belt Excessive Wear Diagnosis
• Drive Belt Tensioner Diagnosis
• Drive Belt Tensioner Diagnosis
• Drive Belt Replacement - Power Steering and Air Conditioning
• Drive Belt Replacement - Air Conditioning, Power Steering and Water Pump
• Instrument Panel (I/P) Retainer Replacement
• Loss of Coolant
• Oil Leak Diagnosis
• Fluid Leak Diagnosis
• Power Steering Fluid Leaks
• Afterblow Enable Procedure
• Air Cleaner Intake Duct Replacement
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Fastener Notice
• Air Cleaner Outlet Duct Replacement
• Engine Oil and Oil Filter Replacement
• Vacuum Brake Booster Replacement
• Electrical Center Identification Views
• Power Steering Cooler Replacement (LY7 W/O V92)
• Battery Negative Cable Disconnect/Connect Procedure
• Draining and Filling Cooling System (GE 47716)
• Air Inlet Grille Panel Replacement
• Carpet Replacement - Front
• Exhaust System Replacement
• Special Tools
• Refrigerant Recovery and Recharging
• Leak Testing
• Air Conditioning (A/C) Diagnostics - Pressure Zone A
• Air Conditioning (A/C) System Performance Test (LH2 - Standard Cooling)
• Compressor Replacement (LH2 - Heavy Duty Cooling)
• Flushing (w/o Auxiliary A/C)
• Flushing (w/Auxiliary A/C)
• Heating Performance Diagnostic
• Refrigerant System Capacities
• A/C Line/Tube Connector Removal/Replacement