Engine Control System - 3.6L (LY7) - Introduction: Removal & Installation Cadillac STS I

Removal Procedure

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Using a scan tool, retrieve the percentage of remaining engine oil and the remaining automatic transmission fluid life. Record the remaining engine oil and the remaining automatic transmission fluid life.
4. Use a DMM in order to measure the main relay circuit voltage at the ECM fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
5. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(ref-197559-S16230888842005101200000) in Engine Electrical.
6. Remove the ECM fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
7. Remove the TCM/IPC fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
8. Remove the ECM/TCM fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
9. Unlock the chassis side (upper) engine control module (ECM) electrical connector. Depress the ECM electrical connector lever lock (1). Simultaneously rotate the ECM connector clamp lever and depress the lock slide (2).
10. Remove the body side (upper) ECM connector.
11. Unlock and remove the engine side (lower) ECM connector.
12. Remove the ECM redundant ground wire and bolt (2) from the ECM.
13. Remove the ECM bolts.
14. Remove the ECM.
15. If you are replacing the ECM bracket, perform the following steps
16. Remove the electrical connector bracket and bolt from the ECM bracket.
17. Remove the ground wire and bolt from the ECM bracket.
18. Remove the wire harness retainer and bolt from the side of the ECM bracket.
19. Remove the ECM bracket bolts (2 and 3).
20. Remove the ECM bracket (1).

Installation Procedure

1. Install the ECM bracket (1).
2. Install the ECM bracket bolts (2 and 3). Tighten: Tighten the ECM bracket bolt (2) to 10 N.m (89 lb in). Tighten the ECM bracket bolts (3) to 23 N.m (17 lb ft).
3. Install the wire harness retainer and bolt to the side of the ECM bracket. Tighten: Tighten the wire harness retainer bolt to 23 N.m (17 lb ft).
4. Install the electrical connector bracket and bolt to the ECM bracket. Tighten: Tighten the electrical connector bracket bolt to 10 N.m (89 lb in).
5. Install the wiring harness ground wire and bolt (2) to the ECM bracket. Tighten: Tighten the wiring harness ground wire bolt 10 N.m (89 lb in).
6. Install the ECM.
7. Install the ECM bolts. Tighten: Tighten the ECM bolts to 10 N.m (89 lb in).
8. Install the ECM redundant ground and bolt (2) to the ECM. Tighten: Tighten the ECM redundant ground wire bolt to 5 N.m (44 lb in).
9. Install the engine side (lower) ECM connector.
10. Install the body side (upper) ECM connector.
11. Install the ECM/TCM fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
12. Install the TCM/IPC fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
13. Install the ECM fuse in the underhood fuse block. Refer to «Electrical Center Identification Views»(ref-197545-S03661450392005101200000) in Wiring Systems.
14. Connect the battery negative cable to the battery. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(ref-197559-S16230888842005101200000) in Engine Electrical.
15. Program the ECM. Refer to «Control Module References»(ref-197535-S32949592342005101200000) in Computer/Integrating Systems.
16. Turn OFF the ignition for at least 5 seconds after the programming event is complete.
17. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
4. Remove the coolant temperature sensor.

1. Install the coolant temperature sensor. Tighten: Tighten the coolant temperature sensor to 22 N.m (16 lb ft).
2. Install the coolant temperature sensor electrical connector.
3. Inspect and fill the cooling system as necessary. Refer to «Draining and Filling Cooling System»(ref-197587-S04962200472005101200000) in Engine Cooling.
4. Install the front compartment sight shields as necessary. Refer «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the mass air flow (MAF) electrical connector.
3. Remove the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
4. Remove the MAF sensor fasteners.
5. Remove the MAF sensor and the MAF sensor seal.
6. Discard the MAF sensor seal.

1. Install the new MAF sensor seal and the MAF sensor.
2. Install the MAF sensor screws. Tighten: Tighten the MAF sensor screws to 4 N.m (35 lb in).
3. Install the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
4. Install the MAF electrical connector.

1. Turn the ignition OFF.
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. Disconnect the barometric pressure (BARO) sensor electrical connector.
4. Remove the BARO sensor bolt.
5. Remove the BARO sensor.

1. Install the BARO sensor.
2. Install the BARO sensor bolt. Tighten: Tighten the sensor bolt to 10 N.m (89 lb in).
3. Connect the BARO sensor electrical connector.
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).

1. Turn the ignition OFF.
2. Remove the fuel injector sight shield, if necessary. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Remove the HO2S electrical connector from the wiring harness bracket.
5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
6. Remove the HO2S from the catalytic converter.

1. Install the HO2S to the catalytic converter. Tighten: Tighten the HO2S to 40 N.m (30 lb ft).
2. Lower the vehicle.
3. Install the HO2S electrical connector to the wiring harness bracket.
4. Connect the HO2S electrical connector.
5. Install the fuel injector sight shield, if necessary. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Remove the HO2S wiring harness from the transmission case.
5. Remove the HO2S.

1. Install the HO2S. Tighten: Tighten the HO2S to 40 N.m (30 lb ft).
2. Connect the HO2S electrical connector.
3. Install the HO2S wiring harness to the transmission case.
4. Lower the vehicle.

1. Turn the ignition OFF.
2. Remove the fuel injector sight shield, if necessary. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
4. Disconnect the heated oxygen sensor (HO2S) electrical connector.
5. Remove the HO2S electrical connector from the wiring harness bracket.
6. Remove the HO2S.

1. Install the HO2S. Tighten: Tighten the HO2S to 40 N.m (30 lb ft).
2. Install the HO2S electrical connector to the wiring harness bracket.
3. Connect the HO2S electrical connector.
4. Lower the vehicle.
5. Install the fuel injector sight shield, if necessary. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector (bank 1 shown, bank 2 similar).
4. Remove the HO2S wiring harness from the transmission case.
5. Remove the HO2S.

1. Install the HO2S. Tighten: Tighten the HO2S to 40 N.m (30 lb ft).
2. Connect the HO2S electrical connector (bank 1 shown, bank 2 similar).
3. Install the HO2S wiring harness to the transmission case.
4. Lower the vehicle.

1. Remove the closeout/insulator panel from under the dashboard on the drivers side. Refer to «Closeout/Insulator Panel Replacement - Left»(ref-197555-S24459859312005101200000) in Instrument Panel, Gages and Console.
2. Disconnect the accelerator pedal position (APP) sensor electrical connector from the accelerator pedal module.
3. Remove the APP sensor mounting bolts.
4. Remove the APP sensor from the vehicle.

1. Position the APP sensor to the mounting plate.
2. Install the APP sensor mounting bolts. Tighten: Tighten the APP sensor mounting bolts to 9 N.m (80 lb in).
3. Connect the APP sensor electrical connector.
4. Operate the accelerator pedal and observe the APP angles using a scan tool. The accelerator pedal should operate freely, without binding between closed throttle and wide open throttle.
5. Install the closeout/insulator panel. Refer to «Closeout/Insulator Panel Replacement - Left»(ref-197555-S24459859312005101200000) in Instrument Panel, Gages and Console.

1. Turn the ignition OFF.
2. Remove the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
3. Remove the throttle body electrical connector.
4. Unlock and reposition the wiring harness conduit.
5. Remove the throttle body bolts.
6. Remove the throttle body and gasket.

1. Carefully clean the throttle body mounting surfaces of any gasket and/or seal material.
2. Install the throttle body and NEW gasket.
3. Install the throttle body bolts. Tighten: Tighten the throttle body bolts to 10 N.m (89 lb in).
4. Install the wiring harness conduit.
5. Install the throttle body electrical connector.
6. Install the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
7. Perform the idle learn procedure. Refer to «Idle Learn Procedure»(ref-197548-S00904297732005101200000) .
8. Use the scan tool to clear all DTCs.

1. Relieve the fuel pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Remove the fuel pressure test port cap.
3. Install the fuel pressure gage to the fuel pressure test port.
4. Place the shop towel in an approved container.
5. Perform any tests and/or diagnostics as needed.

1. Relieve the fuel pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Remove the fuel pressure gage.
3. Place the shop towel in an approved container.
4. Install the fuel pressure test port cap.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Remove the retainer from the quick-connect fitting.
3. Blow dirt out of the fitting using compressed air.
4. Depending on the fuel line size and ability to access the fitting, choose the appropriate tool: J 37088-A or. See «Special Tools»(ref-197548-S13390517732005101200000) . J 44581 . Insert the J 37088-A or. See «Special Tools»(ref-197548-S13390517732005101200000) . J 44581 into the female connector, then push inward to release the locking tabs.
5. Pull the connection apart.
6. Using a clean shop towel, wipe off the male pipe end.
7. Inspect both ends of the fitting for dirt and burrs.
8. Clean or replace the components as required.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the quick-connect fitting together to cause the retaining tabs to snap into place.
3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
4. Install the retainer to the quick-connect fitting.
5. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Blow dirt out of the fitting using compressed air.
3. Squeeze the plastic tabs of the male end connector.
4. Pull the connection apart.
5. Using a clean shop towel, wipe off the male pipe end
6. Inspect both ends of the fitting for dirt and burrs.
7. Clean or replace the components as required.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the quick-connect fitting together to cause the retaining tabs/fingers to snap into place.
3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
4. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

1. Keep a shop cloth and a container ready to capture any spilled fuel.
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
4. Disconnect the quick-connect fitting at the fuel filter inlet. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
5. Using a primary and back-up wrench, remove the threaded fitting at the fuel filter outlet.
6. Slide the fuel filter rearward from the fuel filter bracket.
7. Remove the fuel pipe O-ring seal. Discard the O-ring seal if damaged.
8. Drain any remaining fuel into an approved gasoline container.
9. Discard the fuel filter into an approved container.

1. Lubricate the fuel pipe O-ring seal with clean engine oil.
2. Install the fuel pipe O-ring seal to the fuel pipe.
3. Remove the protective caps from the new fuel filter.
4. Slide the fuel filter forward into the fuel filter bracket.
5. Install the threaded fitting to the fuel filter outlet. Use a back-up wrench in order to prevent the fuel filter from turning. Tighten: Tighten the fuel filter outlet fitting to 30 N.m (22 lb ft).
6. Connect the quick-connect fitting at the fuel filter inlet. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
7. Lower the vehicle.

1. Drain the fuel tank. Refer to «Fuel Tank Draining Procedure»(ref-197548-S19614244172005101200000) .
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
3. Remove the exhaust system. Refer to «Exhaust System Replacement»(ref-197578-S11696311262005101200000) in Engine Exhaust.
4. Remove the propeller shaft. Refer to «Propeller Shaft Replacement - Rear (AWD)»(ref-197579-S22039518262005101200000) or «Propeller Shaft Replacement - Rear (RWD)»(ref-197579-S26284065052005101200000) in Propeller Shaft.
5. Disconnect the filler hose (1) from the fuel tank.
6. Disconnect the filler vent tube (2) from the evaporative emission (EVAP) hose. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) .
7. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) in order to disconnect the following from the chassis bundle: The fuel feed hose The fuel return hose The fuel EVAP hose
8. Disconnect the fuel tank electrical connector.
9. Disconnect the EVAP hoses from the EVAP canister.
10. Pull outward on the retainer tab in order to disengage the retainer from the chassis.
11. Disconnect the electrical connector from the EVAP canister.
12. Raise the lower control arms using a suitable screw jack (3) in order to remove the load from the lower shock bolts (2).
13. Remove the lower shock bolts (2).
14. Remove the screw jack (3).
15. Position the screw jack under the rear frame near the adjuster tie bar, in order to support the front of the rear frame.
16. Remove the 2 front bolts from the rear frame.
17. Lower the screw jack until there is approximately 50 mm (2 in) (a) between the front mounting surface of the rear frame and the chassis. This will allow clearance to access the fuel tank strap bolts.
18. Remove the fuel tank strap bolts.
19. Position the fuel tank straps downward around the rear frame.
20. Carefully bend the fuel tank straps ONLY enough to allow the fuel tank to be removed.
21. With the aid of an assistant, carefully lower the fuel tank from the vehicle.
22. Remove the following components if replacing just the fuel tank: The primary fuel tank module-Refer to «Fuel Tank Module Replacement - Primary»(ref-197548-S24807293072005101200000) . The secondary fuel tank module-Refer to «Fuel Tank Module Replacement - Secondary»(ref-197548-S03917316792005101200000) . The fuel tank pressure sensor-Refer to «Fuel Tank Pressure Sensor Replacement»(ref-197548-S08827240092005101200000) .

1. Install the following components if fuel tank replacement was necessary: The primary fuel tank module-Refer to «Fuel Tank Module Replacement - Primary»(ref-197548-S24807293072005101200000) . The secondary fuel tank module-Refer to «Fuel Tank Module Replacement - Secondary»(ref-197548-S03917316792005101200000) . The fuel tank pressure sensor-Refer to «Fuel Tank Pressure Sensor Replacement»(ref-197548-S08827240092005101200000) .
2. Pressure test the fuel tank. Refer to «Fuel Tank Leak Test»(ref-197605-S16808656442005101200000) .
3. With the aid of an assistant, carefully raise the fuel tank to the vehicle, aligning the filler neck with the filler hose.
4. Carefully bend the fuel tank straps back to their original form.
5. Position the fuel tank straps around the rear frame and upward into position, aligning the holes in the straps with the threaded holes in the chassis.
6. Install the fuel tank strap bolts. Tighten: Tighten the fuel tank strap bolts to 50 N.m (37 lb ft).
7. Connect the filler hose (1) to the fuel tank. Tighten: Tighten the fuel filler tube hose clamp (3) to 3.5 N.m (31 lb in).
8. Connect the filler vent tube (2) to the EVAP hose. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) .
9. Connect the EVAP hoses to the EVAP canister.
10. Insert the retainer into the chassis and press inward on the tab to engage.
11. Connect the electrical connector to the EVAP canister.
12. Connect the fuel tank electrical connector.
13. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) in order to connect the following to the chassis bundle: The fuel feed hose The fuel return hose The fuel EVAP hose
14. Raise the rear frame using the screw jack.
15. Install the 2 front bolts to the rear frame. Tighten: Tighten the rear frame bolts to 200 N.m (148 lb ft).
16. Remove the screw jack.
17. Position the screw jack (3) under the lower control arm in order to raise the lower control arms (2).
18. Install the lower shock bolts (2). Tighten: Tighten the lower shock bolts to 90 N.m (66 lb ft).
19. Remove the screw jack (3).
20. Install the propeller shaft. Refer to «Propeller Shaft Replacement - Rear (AWD)»(ref-197579-S22039518262005101200000) or «Propeller Shaft Replacement - Rear (RWD)»(ref-197579-S26284065052005101200000) in Propeller Shaft.
21. Install the exhaust system. Refer to «Exhaust System Replacement»(ref-197578-S11696311262005101200000) in Engine Exhaust.
22. Refill the fuel tank.
23. Inspect for fuel leaks.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) .
2. Disconnect the fuel tank pressure sensor electrical connector (1).
3. Remove the fuel tank pressure sensor from the evaporative emission (EVAP) canister.

1. Install the fuel tank pressure sensor to the EVAP canister until fully seated.
2. Connect the fuel tank pressure sensor electrical connector (1).
3. Lower the vehicle.

1. Remove the fuel filler cap.
2. Drain the fuel tank below the level of the fuel filler hose. Refer to «Fuel Tank Draining Procedure»(ref-197548-S19614244172005101200000) .
3. Remove the bolts securing the fuel filler tube to the body.
4. Remove the right rear wheel. Refer to «Tire and Wheel Removal and Installation»(ref-197568-S26287798292005101200000) in Tires and Wheels.
5. Remove the right rear wheelhouse liner. Refer to «Wheelhouse Liner Panel Replacement - Rear»(ref-197543-S13583808732005101200000) in Body Rear End.
6. Remove the fuel filler tube brace bolt.
7. Disconnect the fuel filler hose (1) from the fuel tank.
8. Disconnect the filler vent tube (2) from the evaporative emission (EVAP) hose. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) .
9. Remove the fuel filler tube from the vehicle.

1. Position the fuel filler tube to the vehicle.
2. Connect the filler hose (1) to the fuel tank. Tighten: Tighten the fuel filler tube hose clamp (3) to 3.5 N.m (31 lb in).
3. Connect the filler vent tube (2) to the EVAP hose. Refer to «Quick Connect Fitting(s) Service (Plastic Collar)»(ref-197548-S33690352092005101200000) .
4. Install the fuel filler tube brace bolt. Tighten: Tighten the fuel filler tube brace bolt to 9 N.m (80 lb in).
5. Install the bolts securing the fuel filler tube to the body. Tighten: Tighten the fuel filler tube bolts to 3.5 N.m (31 lb in).
6. Install the right rear wheelhouse liner. Refer to «Wheelhouse Liner Panel Replacement - Rear»(ref-197543-S13583808732005101200000) in Body Rear End.
7. Install the right rear wheel. Refer to «Tire and Wheel Removal and Installation»(ref-197568-S26287798292005101200000) in Tires and Wheels.
8. Add fuel to the fuel tank.
9. Inspect for fuel leaks.
10. Install the fuel filler cap.

1. Remove the fuel tank hoses. Refer to «Fuel Hoses/Pipes Replacement - Filter to Tank»(ref-197548-S15731120842005101200000) .
2. Disconnect the electrical connector from the primary fuel tank module.
3. Rotate the cam lock ring counterclockwise using the J 45747 . See «Special Tools»(ref-197548-S13390517732005101200000) .
4. Remove the cam lock ring from the fuel tank.
5. Carefully lift the primary fuel tank module (1) from the fuel tank only enough to access the transfer tube (2).
6. Complete the following in order to disconnect the transfer tube from the primary fuel tank module: Pull the locking mechanism away from the module. Remove the transfer tube from the module.
7. Remove the primary fuel tank module from the fuel tank.
8. Remove the primary fuel tank module seal from the module. Do not reuse the seal.

1. Place the new primary fuel tank module seal (1) over the module (2).
2. Complete the following in order to connect the transfer tube (2) to the primary fuel tank module (1). Grasp the transfer tube (2) from inside the fuel tank. Position the module (1) near the module opening. Connect the transfer tube (2) to the module (1).
3. Carefully insert the primary fuel tank module (1) into the fuel tank.
4. Press the primary fuel tank module (1) downward, aligning the module to the encapsulated ring.
5. Position the cam lock ring to the fuel tank.
6. Rotate the cam lock ring clockwise using the J 45747 until fully seated. See «Special Tools»(ref-197548-S13390517732005101200000) .
7. Connect the electrical connector to the primary fuel tank module.
8. Install the fuel tank hoses. Refer to «Fuel Hoses/Pipes Replacement - Filter to Tank»(ref-197548-S15731120842005101200000) .

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .
2. Disconnect the electrical connector from the secondary fuel tank module.
3. Rotate the cam lock ring counterclockwise using the J 45747 . See «Special Tools»(ref-197548-S13390517732005101200000) .
4. Remove the cam lock ring from the fuel tank.
5. Carefully lift the secondary fuel tank module (2) from the fuel tank only enough to access the transfer tube (1).
6. Complete the following in order to disconnect the transfer tube from the secondary fuel tank module. Pull the locking mechanism away from the module. Remove the transfer tube from the module.
7. Remove the secondary fuel tank module from the fuel tank.
8. Remove the secondary fuel tank module seal from the module. Do not reuse the seal.

1. Place the new secondary fuel tank module seal (1) over the module (2).
2. Complete the following in order to connect the transfer tube (1) to the secondary fuel tank module (2). Grasp the transfer tube (1) from inside the fuel tank. Position the module (2) near the module opening. Connect the transfer tube (1) to the module (2).
3. Carefully insert the secondary fuel tank module (2) into the fuel tank.
4. Press the secondary fuel tank module (2) downward, aligning the module to the encapsulated ring.
5. Position the cam lock ring to the fuel tank.
6. Rotate the cam lock ring clockwise using the J 45747 until fully seated. See «Special Tools»(ref-197548-S13390517732005101200000) .
7. Connect the electrical connector to the secondary fuel tank module.
8. Install the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .

1. Remove the primary fuel tank module. Refer to «Fuel Tank Module Replacement - Primary»(ref-197548-S24807293072005101200000) .
2. Disconnect the fuel level sensor electrical connector (1) from the module.
3. Complete the following in order to remove the fuel level sensor (1) from the module assembly: Pull the locking tab (2) away from the sensor (1). Slide the sensor (1) away from the module assembly.

1. Complete the following in order to install the fuel level sensor (1) to the module assembly: Align the tabs of the sensor (1) with the slots in the module assembly. Slide the sensor (1) fully into position, ensure the locking tab (2) is engaged.
2. Connect the fuel level sensor electrical connector (1) to the module.
3. Install the primary fuel tank module. Refer to «Fuel Tank Module Replacement - Primary»(ref-197548-S24807293072005101200000) .

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .
2. Disconnect the following from the primary fuel tank module: The pressure hose The return hose
3. Disconnect the hoses from the retaining feature at the fuel tank.

1. Clean any contamination from the male pipe ends of the primary fuel tank module.
2. Connect the hoses to the retaining feature at the fuel tank.
3. Connect the following to the primary fuel tank module: The pressure hose The return hose
4. Install the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .

The fuel system hose/pipes are serviceable individually or as a complete fuel/brake bundle assembly, the following procedure is servicing the fuel hose/pipes individually.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Remove the fuel pipe retaining clip from the fuel pipe. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
3. Disconnect the fuel pipe (2) from the fuel rail. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
4. Disconnect the evaporative emission (EVAP) purge line (3) from the purge solenoid.
5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
6. Disconnect the fuel pipes from the fuel filter and the fuel tank bundle
7. Pull the locking mechanism (1) outward in order to disengage the fuel/brake bundle chassis pipe retainers from the rail.
8. Open the retainers (1) located at the forward portion of the rail in order to remove the chassis hose/pipes.
9. Complete the following in order to remove the chassis hose/pipes from the retainers (2) located at the rearward portion of the rail. Pull the retainers (2) free from the rail. Open the retainers (2) at the top. Remove the chassis hose/pipes from the retainers (2).
10. Pull downward in order to disconnect the fuel/brake bundle chassis pipe retainer from the underbody.
11. Remove the bolt securing the fuel filter bracket to the body.
12. Remove the EVAP hose from the fuel filter bracket.
13. Remove the bolts securing the transmission support to the underbody, from the right side only.
14. Pull the right side transmission support down only enough to allow removal of the chassis fuel hose/pipes.
15. Partially lower the hoist only enough to simultaneously gain access to both the front and rear portions of the chassis fuel hose/pipes.
16. With the aid of an assistant, carefully guide the chassis fuel hose/pipes down through the engine compartment, removing from the bottom.

1. Clean any of the contamination from the male line ends and apply a few drops of clean engine oil.
2. With the aid of an assistant, carefully guide the chassis fuel hose/pipes up through the engine compartment into position.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
4. Pull the right side transmission support down only enough to allow installation of the chassis fuel hose/pipes.
5. Install the transmission support right side bolts. Refer to «Transmission Support Replacement»(ref-197573-S23738246782005101200000) in Frame and Underbody.
6. Install the EVAP hose to the fuel filter bracket
7. Install the fuel filter bracket bolt. Tighten: Tighten the fuel filter bracket bolt to 9 N.m (80 lb in).
8. Install the fuel/brake bundle to the underbody.
9. Complete the following in order to install the chassis hose/pipes to the retainers (2) located at the rearward portion of the rail: Install the chassis hose/pipes into the retainers (2). Close the retainers (2) at the top. Insert the retainers (2) into the rail.
10. Install the chassis hose/pipes into the retainers (1) located at the forward portion of the rail.
11. Close the retainers.
12. Push the locking mechanism (1) inward in order to engage the fuel/brake bundle chassis pipe retainers to the rail.
13. Connect the fuel feed pipe and the EVAP hose to the fuel bundle.
14. Lower the vehicle.
15. Connect the evaporative emission (EVAP) purge line (3) to the purge solenoid.
16. Connect the fuel feed pipe (1) to the fuel rail. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
17. Install the fuel pipe retaining clip.

Assemble the fuel system as follows

1. Install the fuel injectors and fuel rail. Refer to «Fuel Injectors and Fuel Rail Replacement»(ref-197548-S28119688992005101200000) .
2. Install the fuel module assemblies. Refer to «Fuel Tank Module Replacement - Primary»(ref-197548-S24807293072005101200000) and «Fuel Tank Module Replacement - Secondary»(ref-197548-S03917316792005101200000) .
3. Install the fuel filter. Refer to «Fuel Filter Replacement»(ref-197548-S24990639422005101200000) .
4. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) in order to connect the following quick connect fittings to the fuel rail: The feed hose/pipe The return hose/pipe

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(ref-197548-S36551431282005101200000) .
2. Remove the upper intake manifold with the lower intake manifold. Refer to «Intake Manifold Replacement - Upper»(ref-197574-S13524512152005101200000) in Engine Mechanical - 3.6L (LY7).
3. Remove the fuel pipe retaining clip.
4. Disconnect the fuel feed pipe (2) from the fuel injector rail. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
5. Use compressed air in order to remove debris from the area where the fuel injectors enter the intake manifold.
6. Remove the fuel rail bolts.
7. Remove the fuel rail with the fuel injectors.
8. Disengage the fuel injector electrical connector lock.
9. Disconnect the fuel injector electrical connector.
10. Remove the fuel injector retainer clip.
11. Remove the fuel injector.
12. Remove and discard the fuel injector seals.

1. Install NEW fuel injector seals.
2. Install the fuel injector.
3. Install the fuel injector retainer clip.
4. Install the fuel injector electrical connector.
5. Engage the fuel injector electrical connector lock.
6. Install the fuel rail with the fuel injectors.
7. Install the fuel rail bolts. Tighten: Tighten the fuel rail bolts to 10 N.m (89 lb in).
8. Connect the fuel feed pipe (2) to the fuel rail. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(ref-197548-S19917003432005101200000) .
9. Install the fuel pipe retaining clip.
10. Install the upper intake manifold. Refer to «Intake Manifold Replacement - Upper»(ref-197574-S13524512152005101200000) in Engine Mechanical -3.6L (LY7).

1. Turn the ignition OFF.
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. Disconnect the purge line (3) from the purge valve solenoid.
4. Disconnect the purge valve solenoid electrical connector.
5. Disconnect the purge line from the manifold side of the purge valve solenoid.
6. Remove the purge valve solenoid from the bracket.

1. Install the purge valve solenoid to the bracket.
2. Disconnect the purge line from the manifold side of the purge valve solenoid.
3. Disconnect the purge valve solenoid electrical connector.
4. Connect the purge line (3) to the purge valve solenoid.
5. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).

1. Remove the evaporative emission (EVAP) canister. Refer to «Evaporative Emission (EVAP) Canister Replacement»(ref-197548-S29465145162005101200000) .
2. Clean away any debris that may be present around the EVAP canister vent valve.
3. Twist the EVAP canister vent valve counterclockwise.
4. Pull the EVAP canister vent valve from the EVAP canister.

1. Insert the EVAP canister vent valve into the EVAP canister.
2. Twist the EVAP canister vent valve clockwise into the locked position.
3. Install the EVAP canister. Refer to «Evaporative Emission (EVAP) Canister Replacement»(ref-197548-S29465145162005101200000) .

Note. Do not attempt to straighten kinked nylon pipes. Replace any kinked nylon pipes in order to prevent damage to the vehicle. Do not attempt to repair sections of nylon pipes. Replace damaged nylon pipes. Replace the vapor hoses/pipes with original equipment or parts that meet GM specifications.

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .
2. Remove the chassis to canister evaporative emission (EVAP) hose from the following: The body retainer (1) The 3 retaining features (2) on the fuel tank The retainer clip (3)
3. Remove the EVAP hose from the fuel tank.

1. Position the EVAP hose to the fuel tank.
2. Install the chassis to canister EVAP hose to the following: The body retainer (1) The 3 retaining features (2) on the fuel tank The retainer clip (3)
3. Install the fuel tank. Refer to «Fuel Tank Replacement»(ref-197548-S28991471872005101200000) .

1. Remove the rear frame. Refer to «Frame Replacement - Rear»(ref-197573-S13795118782005101200000) in Frame and Underbody.
2. Disconnect the evaporative emission (EVAP) hoses from the EVAP canister.
3. Disconnect the electrical connector from the EVAP canister.
4. Remove the EVAP canister retaining nuts.
5. Complete the following in order to remove the EVAP canister: Lower the rear of the canister enough to clear the 2 weld studs. Slide the canister rearward from the body brace.

1. Complete the following in order to install the EVAP canister: Insert the fresh air tube and tab on the canister forward into the body brace. Rotate the rear of the canister up over the 2 weld studs on the floor pan.
2. Install the EVAP canister retaining nuts. Tighten: Tighten the EVAP canister retaining nuts to 6 N.m (53 lb in).
3. Connect the EVAP hoses to the EVAP canister.
4. Connect the electrical connector to the EVAP canister.
5. Install the rear frame. Refer to «Frame Replacement - Rear»(ref-197573-S13795118782005101200000) in Frame and Underbody.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
2. Using a 90 degree pick, disengage the lower filter cover clips.
3. Insert a flat-bladed tool between the filter cover and canister, and push up to disengage the upper clips.
4. Remove and discard the evaporative emission (EVAP) canister filter cover.
5. Remove and discard the EVAP canister filter.
6. Clean the inside of the EVAP canister filter housing with a clean shop towel.

1. Insert a NEW EVAP canister filter into the EVAP canister.
2. Install a NEW EVAP canister filter cover seal to a EVAP NEW canister cover.
3. Snap the EVAP canister filter cover onto the EVAP canister.
4. Lower the vehicle.

Scheme 30

1. Turn the ignition OFF.
2. Remove the engine cover. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. If you are replacing the ignition coil for cylinder 1 or 3, remove and reposition the intake manifold. Perform the following steps: Disconnect the air cleaner duct from the throttle body. Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover. IMPORTANT: Do NOT separate the upper intake manifold from the lower intake manifold. Remove the intake manifold bolts. Remove the intake manifold brace bolts (1 and 2) and the brace. Remove and reposition the upper intake manifold with the lower intake manifold in order to gain sufficient clearance for ignition coil removal.
4. Remove the ignition coil electrical connector(s).
5. Remove the ignition coil bolt(s).
6. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s). Tighten: Tighten the ignition coil bolt(s) to 10 N.m (89 lb in).
3. Install the ignition coil electrical connector(s).
4. If necessary, install the intake manifold. Refer to «Intake Manifold Replacement - Lower»(ref-197574-S30232017352005101200000) in Engine Mechanical - 3.6L (LY7).
5. Install the engine cover. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).

1. Turn the ignition OFF.
2. Remove the engine cover. Refer to «Fuel Injector Sight Shield Replacement»(ref-197574-S25852276312005101200000) in Engine Mechanical - 3.6L (LY7).
3. If you are replacing the ignition coil for cylinder 2, remove and reposition the intake manifold. Perform the following steps: Disconnect the air cleaner duct from the throttle body. Disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover. IMPORTANT: Do NOT separate the upper intake manifold from the lower intake manifold. Remove the intake manifold bolts. Remove the intake manifold brace bolts (1 and 2) and the brace. Remove and reposition the upper intake manifold with the lower intake manifold in order to gain sufficient clearance for ignition coil removal.
4. Remove the ignition coil electrical connector(s).
5. Remove the ignition coil bolt(s).
6. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s). Tighten: Tighten the ignition coil bolt(s) to 10 N.m (89 lb in).
3. Install the ignition coil electrical connector(s).
4. If necessary, install the upper intake manifold. Refer to «Intake Manifold Replacement - Upper»(ref-197574-S13524512152005101200000) in Engine Mechanical - 3.6L (LY7).

1. Turn the ignition OFF.
2. Remove the ignition coil. Refer to «Ignition Coil(s) Replacement - Bank 1»(ref-197548-S32221811712005101200000) and/or «Ignition Coil(s) Replacement - Bank 2»(ref-197548-S32247487222005101200000) .
3. Use compressed air in order to remove debris from the spark plug cavity.
4. Remove the spark plug.

1. Ensure that the spark plug gap is equivalent to the spark plug gap specification. Refer to «Ignition System Specifications»(ref-197548-S04251157732005101200000) .
2. Install the spark plug. Tighten: Tighten the spark plug to 20 N.m (15 lb ft).
3. Install the ignition coil. Refer to «Ignition Coil(s) Replacement - Bank 1»(ref-197548-S32221811712005101200000) and/or «Ignition Coil(s) Replacement - Bank 2»(ref-197548-S32247487222005101200000) .

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
3. Reposition the wiring harness heat shield to obtain access.
4. Disconnect the crankshaft position (CKP) electrical connector (3).
5. Remove the crankshaft sensor bolt.
6. Remove the crankshaft sensor.

1. Install the crankshaft position sensor.
2. Install the crankshaft position sensor bolt. Tighten: Tighten the crankshaft position sensor bolt to 10 N.m (89 lb in).
3. Connect the CKP electrical connector (3).
4. Install the wiring harness heat shield to the oil level indicator tube.
5. Lower the vehicle.

1. Turn the ignition OFF.
2. Remove the power steering fluid reservoir bolts and reposition the power steering fluid reservoir in order to provide access. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.
3. Remove the camshaft position (CMP) sensor electrical connector.
4. Remove the CMP sensor bolt.
5. Remove the CMP sensor.

1. Install the CMP sensor.
2. Install the CMP sensor bolt. Tighten: Tighten the CMP sensor bolt to 10 N.m (89 lb in).
3. Install the CMP sensor electrical connector.
4. Install the power steering fluid reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.

1. Turn the ignition OFF.
2. Remove the power steering fluid reservoir bolts and reposition the power steering fluid reservoir in order to provide access. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.
3. Remove the camshaft position (CMP) sensor electrical connector.
4. Remove the CMP sensor bolt.
5. Remove the CMP sensor.

1. Install the CMP sensor.
2. Install the CMP sensor bolt. Tighten: Tighten the CMP sensor bolt to 10 N.m (89 lb in).
3. Install the CMP sensor electrical connector.
4. Install the power steering fluid reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Remove the ECM bracket bolts and reposition the ECM bracket in order to provide access.
4. Disconnect the camshaft position (CMP) sensor electrical connector.
5. Remove the CMP sensor bolt.
6. Remove the CMP sensor.

1. Install the CMP sensor.
2. Install the CMP sensor bolt. Tighten: Tighten the CMP sensor bolt to 10 N.m (89 lb in).
3. Connect the CMP sensor electrical connector.
4. Install the ECM bracket with the ECM. Refer to «Engine Control Module (ECM) Replacement»(ref-197548-S14860473272005101200000) .
5. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Disconnect the camshaft position (CMP) sensor electrical connector.
4. Remove the CMP sensor bolt.
5. Remove the CMP sensor.

1. Install the CMP sensor.
2. Install the CMP sensor bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
3. Connect the CMP sensor electrical connector.
4. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Remove the ECM bracket bolts and reposition the ECM bracket in order to provide access.
4. Disconnect the camshaft position (CMP) actuator valve electrical connector.
5. Remove the CMP actuator valve bolt.
6. Remove the CMP actuator valve.

1. Install the CMP actuator valve.
2. Install the CMP actuator valve bolt. Tighten: Tighten the CMP actuator valve bolt to 10 N.m (89 lb in).
3. Connect the CMP actuator valve electrical connector.
4. Install the ECM bracket with the ECM. Refer to «Engine Control Module (ECM) Replacement»(ref-197548-S14860473272005101200000) .
5. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Disconnect the camshaft position (CMP) actuator valve electrical connector.
4. Remove the CMP actuator valve bolt.
5. Remove the CMP actuator valve.

1. Install the CMP actuator valve.
2. Install the CMP actuator valve bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
3. Connect the CMP valve electrical connector.
4. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

1. Turn the ignition OFF.
2. Remove the power steering fluid reservoir bolts and reposition the power steering fluid reservoir in order to provide access. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.
3. Remove the camshaft position (CMP) actuator valve electrical connector.
4. Remove the CMP actuator valve bolt.
5. Remove the CMP actuator valve.

1. Install the CMP actuator valve.
2. Install the CMP actuator valve bolt. Tighten: Tighten the CMP actuator valve bolt to 10 N.m (89 lb in).
3. Install the CMP actuator valve electrical connector.
4. Install the power steering fluid reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.

1. Turn the ignition OFF.
2. Remove the power steering fluid reservoir bolts and reposition the power steering fluid reservoir in order to provide access. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.
3. Remove the camshaft position (CMP) actuator valve electrical connector.
4. Remove the CMP actuator valve bolt.
5. Remove the CMP actuator valve.

1. Install the CMP actuator valve.
2. Install the CMP actuator valve bolt. Tighten: Tighten the CMP actuator valve bolt to 10 N.m (89 lb in).
3. Install the CMP actuator valve electrical connector.
4. Install the power steering fluid reservoir. Refer to «Remote Power Steering Fluid Reservoir Replacement (LH2)»(ref-197600-S28414548482005101200000) or «Remote Power Steering Fluid Reservoir Replacement (LY7)»(ref-197600-S39984550642005101200000) in Power Steering System.

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
3. Reposition the wiring harness heat shield to obtain access.
4. Remove the knock sensor (KS) electrical connector.
5. Remove the KS bolt.
6. Remove the KS.

1. Install the KS.
2. Install the KS bolt. Tighten: Tighten the KS bolt to 23 N.m (17 lb ft).
3. Install the KS electrical connector.
4. Install the wiring harness heat shield to the original position.
5. Lower the vehicle.

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-197567-S01952905382005101200000) in General Information.
3. Remove the wiring harness heat shield from the oil level indicator tube to gain access.
4. Remove the knock sensor (KS) electrical connector.
5. Remove the KS bolt.
6. Remove the KS.

1. Install the KS.
2. Install the KS bolt. Tighten: Tighten the KS bolt to 23 N.m (17 lb ft).
3. Install the KS electrical connector.
4. Install the wiring harness heat shield to the oil level indicator tube.
5. Lower the vehicle.

1. Remove the upper intake manifold with the lower intake manifold. Refer to «Intake Manifold Replacement - Lower»(ref-197574-S30232017352005101200000) in Engine Mechanical - 3.6L (LY7).
2. Remove the intake manifold runner control solenoid bolts.
3. Remove the intake manifold runner control solenoid.

1. Install the intake manifold runner control solenoid.
2. Install the intake manifold runner control solenoid bolts. Tighten: Tighten the intake manifold runner control solenoid bolts to 10 N.m (89 lb in).
3. Install the upper intake manifold. Refer to «Intake Manifold Replacement - Lower»(ref-197574-S30232017352005101200000) in Engine Mechanical - 3.6L (LY7).

1. Remove the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
2. Loosen the air cleaner cover screws.
3. Open the air cleaner cover and remove the air cleaner element.

1. Install the air cleaner element and close the air cleaner cover.
2. Install the air cleaner cover screws. Tighten: Tighten the air cleaner cover screws to 8 N.m (71 lb in).
3. Install the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .

1. Turn the ignition OFF.
2. Remove the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .
3. Disconnect the mass air flow (MAF) electrical connector.
4. Remove the air cleaner bolts.
5. Remove the air cleaner.

1. Install the air cleaner.
2. Install the air cleaner bolts. Tighten: Tighten the air cleaner bolts to 9 N.m (78 lb in).
3. Connect the MAF electrical connector.
4. Install the air cleaner intake duct. Refer to «Air Cleaner Intake Duct Replacement»(ref-197548-S12301214282005101200000) .

1. Turn the ignition OFF.
2. Remove the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.
3. Remove the positive crankcase ventilation (PCV) hose from the air cleaner duct resonator.
4. Loosen the air cleaner duct clamps.
5. Remove the air cleaner duct.

1. Install the air cleaner intake duct.
2. Install the PCV hose to the intake duct resonator.
3. Tighten the air cleaner duct clamps. Tighten: Tighten the clamps to 4 N.m (35 lb in).
4. Install the front compartment sight shields as necessary. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(ref-197566-S35175647642005101200000) in Body Front End.

Scheme 31

The engine control module (ECM) (1) interacts with many more emission related components and systems, and monitors emission related components and systems for deterioration. OBD II diagnostics monitor the system performance and a diagnostic trouble code (DTC) sets if the system performance degrades.

The malfunction indicator lamp (MIL) operation and the DTC storage are dictated by the DTC type. A DTC is ranked as a Type A or Type B if the DTC is emissions related. Type C is a non-emissions related DTC.

The ECM is in the engine compartment. The ECM is the control center of the engine controls system. The ECM controls the following components

1. The fuel injection system
2. The ignition system
3. The emission control systems
4. The on-board diagnostics
5. The A/C and fan systems
6. The throttle actuation control (TAC) system

The ECM constantly monitors the information from various sensors and other inputs, and controls the systems that affect the vehicle performance and the emissions. The ECM also performs diagnostic tests on various parts of the system. The ECM can recognize operational problems and alert the driver via the MIL. When the ECM detects a malfunction, the ECM stores a DTC. The condition area is identified by the particular DTC that is set. This aids the technician in making repairs.