Engine Controls and Fuel - 6.2l - Repair Instructions Cadillac CTS II

Scheme 81

Crankshaft Position System Variation Learn

1. Install a scan tool.
2. Monitor the engine control module (ECM) for DTCs with a scan tool. If other DTCs are set, except DTC P0315, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for the applicable DTC that set.
3. Select the crankshaft position variation learn procedure with a scan tool.
4. The scan tool instructs you to perform the following: Accelerate to wide open throttle (WOT). Release throttle when fuel cut-off occurs. Observe fuel cut-off for applicable engine. Engine should not accelerate beyond calibrated RPM value. Release throttle immediately if value is exceeded. Block drive wheels. Set parking brake. DO NOT apply brake pedal. Cycle ignition from OFF to ON. Apply and hold brake pedal. Start and idle engine. Turn air conditioning (A/C) OFF. Vehicle must remain in Park or Neutral. The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components: Crankshaft position sensors activity-If there is a crankshaft position sensor condition, refer to the applicable DTC that set. Camshaft position sensor activity-If there is a camshaft position sensor condition, refer to the applicable DTC that set. Engine coolant temperature (ECT)-If the ECT is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.
5. Enable the Crankshaft Position System Variation Learn Procedure with a scan tool.
6. Accelerate to WOT.
7. Release when the fuel cut-off occurs.
8. Test in progress.
9. The scan tool displays Learn Status: Learned this ignition. If the scan tool indicates that DTC P0315 ran and passed, the Crankshaft Position Variation Learn Procedure is complete. If the scan tool indicates DTC P0315 failed or did not run, refer to «DTC P0315»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-dtc-p0230-dtc-p0650) . If any other DTCs set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for the applicable DTC that set.
10. Turn OFF the ignition for 30 s after the learn procedure is completed successfully.
11. The Crankshaft Position Variation Learn Procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set: A crankshaft position sensor replacement An engine replacement A ECM replacement A harmonic balancer replacement A crankshaft replacement Any engine repairs which disturb the crankshaft position sensor relationship

Description

The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to throttle body coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.

An engine that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to learn out the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.

The idle may be unstable or a DTC may set if the learned values do not match the actual airflow.

Conditions for Running the Throttle Learn Procedure

Reset Procedure

1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0222, P0223, P0300, P0351, P0352, P0353, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
2. Ignition ON, engine OFF.
3. The vehicle speed sensor (VSS) is 0 km/h (0 mph).

Learn Procedure

1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0222, P0223, P0300, P0351, P0352, P0353, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
2. The engine speed is between 450-4,000 RPM.
3. The manifold absolute pressure (MAP) is greater than 5 kPa.
4. The mass air flow (MAF) is greater than 2 g/s.
5. The ignition voltage is greater than 10 volts.

Throttle Learn

Reset Procedure (Performed after the throttle body is cleaned or replaced)

1. Ignition ON, engine OFF, perform the Idle Learn Reset in Module Setup with a scan tool.
2. Start the engine and monitor the TB Idle Airflow Compensation parameter. The TB Idle Airflow Compensation value should equal 0 percent and the engine should be idling at a normal idle speed.
3. Clear the DTCs and return to the diagnostic that referred you here.

Learn Procedure (Performed after the ECM is flashed or replaced)

1. Start and idle the engine for 3 minutes.
2. With a scan tool, monitor the Desired Idle Speed and the actual Engine Speed.
3. The ECM will start to learn the new idle cells and Desired Idle Speed should start to decrease.
4. Ignition OFF for 60 seconds.
5. Start and idle the engine for 3 minutes.
6. After the 3 minute run time the engine should be idling normal. NOTE: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn. If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
7. After the drive cycle, the engine should be idling normally. If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Removal Procedure

1. Turn OFF the ignition.
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
3. Drain the engine coolant below the level of the engine coolant temperature (ECT) sensor. Refer to «Cooling System Draining and Filling (Static Fill LSA)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716 LSA)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .
4. Lower the vehicle.
5. Disconnect the harness connector from the ECT sensor.
6. Remove the ECT sensor.

Installation Procedure

1. Coat the ECT sensor threads with sealer P/N 12346004 (Canadian P/N 10953480) or the equivalent.
2. Install the ECT sensor and tighten to 20 N.m (15 lb ft).
3. Connect the ECT sensor electrical connector.
4. Refill the engine coolant. Refer to «Cooling System Draining and Filling (Static Fill LSA)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716 LSA)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .

Scheme 82

Scheme 83

Scheme 84

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
3. Remove any wire harness retainers and note the wire harness routing for reassembly.
4. Carefully remove the HO2S (1).

1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or the equivalent if necessary.
2. Install the HO2S (1) and tighten to 41 N.m (30 lb ft).
3. Connect the HO2S electrical connector.
4. Route and attach the wire harness as noted during disassembly.
5. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
2. Disconnect the heated oxygen sensor (HO2S) electrical connector. Note the harness routing and retainers for reassembly.
3. Remove the HO2S (1).

1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or the equivalent if necessary.
2. Install the HO2S (1) and tighten to 41 N.m (30 lb ft).
3. Connect the HO2S electrical connector. Ensure that the harness is routed and retained as noted during disassembly.
4. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
2. Disconnect the heated oxygen sensor (HO2S) electrical connectors. Note the harness routing and retainers for reassembly.
3. Remove the right side catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
4. Remove the HO2S (1).

1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or the equivalent if necessary.
2. Install the HO2S (1) and tighten to 41 N.m (30 lb ft).
3. Install the right side catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
4. Connect the HO2S electrical connector. Ensure that the harness is routed and retained as noted during disassembly.
5. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
2. Disconnect the heated oxygen sensor (HO2S) electrical connector. Note the harness routing and retainers for reassembly.
3. Remove the HO2S (1).

1. Coat the threads of the HO2S with the anti-seize compound P/N 5613695, or the equivalent if necessary.
2. Install the HO2S (1) and tighten to 41 N.m (30 lb ft).
3. Connect the HO2S electrical connector. Ensure that the harness is routed and retained as noted during disassembly.
4. Lower the vehicle.

1. Remove the closeout/insulator panel from under the dashboard on the drivers side. Refer to «Instrument Panel Insulator Replacement - Left Side (Left Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Left Side (Right Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Right Side (Left Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Right Side (Right Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
2. Disconnect the accelerator pedal position (APP) sensor electrical connector from the accelerator pedal module.
3. Remove the nuts from the APP sensor mounting plate and remove the APP sensor (1) from the front of dash.

1. Install the APP sensor (1) to the front of dash.
2. Install the APP sensor mounting nuts and tighten 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 «Instrument Panel Insulator Replacement - Left Side (Left Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Left Side (Right Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Right Side (Left Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) or «Instrument Panel Insulator Replacement - Right Side (Right Hand Drive)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .

Scheme 85

Throttle Body Cleaning

1. Remove the air intake duct.
2. Inspect the throttle body bore and the throttle valve plate for deposits. If necessary, open the throttle valve to inspect all surfaces.
3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with an appropriate cleaning substance, such one of the following: GM Top Engine Cleaner P/N 1052626 ACDelco Carburetor Tune-Up Conditioner P/N X66-P
4. Install the air intake duct.
5. Perform the throttle learn procedure. Refer to «Throttle/Idle Learn»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

Special Tools

CH-48027 Digital Pressure Gauge

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (With CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) or «Fuel Pressure Relief (Without CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-pressure-relief-without-ch-48027) .
2. Connect the CH-48027-1 (1) to the CH-48027-2 (2).
3. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
4. Perform any tests and/or diagnostics as needed. For the proper usage of the CH-48027 , refer to the manufacture's directions.

1. Relieve the fuel system pressure, if required. Perform the following steps: WARNING: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gauge. Place the towel in an approved container when the connection of the fuel pressure gauge is complete. Wrap a shop towel around the fuel rail service port. Place the hose on the CH-48027-2 (2) into an approved gasoline container. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail. Close the valve on the CH-48027-2 (2). Remove the hose on the CH-48027-2 (2) from the approved gasoline container. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
2. Disconnect the CH-48027-1 (1) from the CH-48027-2 (2).
3. Disconnect the CH-48027-2 (2) from the CH-48027-3 (4).
4. Disconnect the CH-48027-3 (4) from the fuel rail service port.
5. Install the fuel rail service port cap.
6. Install the engine cover, if required.
7. Tighten the fuel fill cap.

CH-48027 Digital Pressure Gauge

1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to «Electrical Center Identification Views»(/cadillac/cts/ii-2007-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
2. Remove the engine cover, if required.
3. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
4. Remove the fuel rail service port cap.
5. Wrap a shop towel around the fuel rail service port.
6. Connect the CH-48027-3 (4) to the fuel rail service port.
7. Connect the CH-48027-2 (2) to the CH-48027-3 (4).
8. Place the hose on the CH-48027-2 (2) into an approved gasoline container.
9. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail.
10. Close the valve on the CH-48027-2 (2).
11. Remove the hose on the CH-48027-2 (2) from the approved gasoline container.
12. Disconnect the CH-48027-2 (2) from the CH-48027-3 (4).
13. Disconnect the CH-48027-3 (4) from the fuel rail service port.
14. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
15. Install the fuel rail service port cap.
16. Install the engine cover, if required.
17. Tighten the fuel fill cap.

Fuel Pressure Relief (Without CH 48027)

1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to «Electrical Center Identification Views»(/cadillac/cts/ii-2007-2014/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
2. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
3. Remove the engine cover, if required.
4. Remove the fuel rail service port cap.
5. Wrap a shop towel around the fuel rail service port and using a small flat-bladed tool, depress (open) the fuel rail test port valve.
6. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
7. Install the fuel rail service port cap.
8. Install the engine cover, if required.
9. Tighten the fuel fill cap.

Metal Collar Quick Connect Fitting Service

Special Tools

1. J 37088-A Fuel Line Disconnect Tool Set
2. J 44581 Fuel Line Disconnect Tool

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-pressure-relief) .
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 J 44581 . Insert the J 37088-A or 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.

Disconnect Procedure

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-pressure-relief) .
2. Using compressed air, blow any dirt or debris from around the connection.
3. This step applies to Bartholomew style connector ONLY. Squeeze the plastic quick connect fitting release tabs.
4. This step applies to Release Tab style connector ONLY. Release the fitting by pushing the tab toward the other side of the slot in the fitting.
5. This step applies to the Squeeze to Release style connector ONLY. Squeeze where indicated by the arrows shown above on both sides of the plastic ring surrounding the quick connect fitting.
6. This step applies to the Sliding Retainer style connector ONLY. Release the fitting by pressing on one side of the release tab causing it to push in slightly. If the tab does not move try pressing the tab in from the opposite side. The tab will only move in one direction.
7. This step applies to the Push Down TI style connector ONLY. Release the fitting by pressing on the tab indicated by the arrow.
8. Pull the connection apart.

Connect Procedure

1. Apply a few drops of clean engine oil to the male connection end.
2. Push both sides of the quick-connect fitting together in order to cause the retaining feature to snap into place.
3. Once installed, pull on both sides of the connection in order to make sure the connection is secure.

Scheme 86

Fuel Tank Draining

Special Tools

1. J 36850 Transjel Lubricant
2. J 45004 Fuel Drain Hose

1. Remove the fuel filler cap.
2. Insert the J 45004 into the fuel tank until the hose reaches the bottom of the fuel tank.
3. Use an air operated pump device in order to drain the fuel into an approved gasoline container. Up to 26 liters (7 gallons) of residual fuel may remain in the secondary side of the fuel tank.
4. Simultaneously twist and pull in order to remove the J 45004 from the fuel tank.

1. Remove the fuel filler cap.
2. Drain the fuel tank below the level of the fuel filler hose. Refer to «Fuel Tank Draining»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-tank-draining) .
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»(/cadillac/cts/ii-2007-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
5. Remove the right rear wheelhouse liner. Refer to «Rear Wheelhouse Panel Liner Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
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 «Evaporative Emission System Hose/Pipe Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
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 and tighten to 3.5 N.m (31 lb in).
3. Connect the filler vent tube (2) to the EVAP hose. Refer to «Evaporative Emission System Hose/Pipe Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
4. Install the fuel filler tube brace bolt and tighten to 9 N.m (80 lb in).
5. Install the bolts securing the fuel filler tube to the body and tighten to 3.5 N.m (31 lb in).
6. Install the right rear wheelhouse liner. Refer to «Rear Wheelhouse Panel Liner Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
7. Install the right rear wheel. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/ii-2007-2014/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
8. Add fuel to the fuel tank.
9. Inspect for fuel leaks.
10. Install the fuel filler cap.

1. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-tank-draining) .
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (With CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) or «Fuel Pressure Relief (Without CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-pressure-relief-without-ch-48027) .
3. Remove the muffler assembly. Refer to «Exhaust System Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) or «Exhaust System Replacement (Single)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
4. Remove the rear propeller shaft. Refer to «Rear Propeller Shaft Replacement (RPO LSA)»(/cadillac/cts/ii-2007-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
5. Remove the rear frame assembly (2). Refer to «Rear Frame Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Disconnect the filler hose (1) from the fuel tank.
7. Disconnect the filler vent tube (2) from the evaporative emission (EVAP) hose. Refer to «Evaporative Emission System Hose/Pipe Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
8. Disconnect the fuel feed pipe (1) and fuel EVAP hose (2) from the chassis bundle. Refer to «Fuel Line Replacement - Chassis»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
9. Release the electrical connector interlock and disconnect the fuel tank electrical connector.
10. Remove the fuel tank electrical connector retainer from the chassis.
11. Remove the fuel tank electrical harness from the chassis mounted retainer.
12. Disconnect the EVAP hoses from the EVAP canister.
13. Pull outward on the retainer tab in order to disengage the retainer from the chassis.
14. Disconnect the electrical connector from the fuel tank pressure sensor (1).
15. Disconnect the electrical connector from the EVAP canister vent valve.
16. Support the fuel tank with a suitable jack.
17. Remove the fuel tank strap bolts.
18. Remove the fuel tank straps.
19. With the aid of an assistant, carefully lower the fuel tank from the vehicle.
20. Remove the following components if replacing just the fuel tank: The fuel tank pump module-Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) . The Fuel level sensor assembly-Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

1. Install the following components if fuel tank replacement was necessary: The fuel tank pump module-Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) . The Fuel level sensor assembly-Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. With the aid of an assistant, carefully raise the fuel tank to the vehicle.
3. Install the fuel tank straps to the vehicle.
4. Install the fuel tank strap bolts and tighten to 50 N.m (37 lb ft).
5. Connect the filler hose (1) to the fuel tank and tighten to 3.5 N.m (31 lb in).
6. Connect the filler vent tube (2) to the EVAP hose. Refer to «Fuel Line Replacement - Chassis»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
7. Connect the EVAP hoses to the EVAP canister.
8. Connect the EVAP purge valve and fuel tank pressure sensor electrical connectors.
9. Install the fuel tank wire harness and wire harness connector to the retainers on the chassis.
10. Connect the fuel tank electrical connector, and engage the connector interlock.
11. Connect the fuel EVAP hose (2) and the fuel feed pipe (1) to the chassis bundle. Refer to «Fuel Line Replacement - Chassis»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
12. Install the rear frame assembly (2). Refer to «Rear Frame Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
13. Install the propeller shaft. Refer to «Rear Propeller Shaft Replacement (RPO LSA)»(/cadillac/cts/ii-2007-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
14. Install muffler assembly. Refer to «Exhaust System Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) or «Exhaust System Replacement (Single)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
15. Refill the fuel tank.
16. Install the fuel fill cap.
17. Inspect for fuel leaks.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
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.

J 45722: Fuel Sender Lock Ring Wrench

1. Remove the fuel tank in order to gain access to the primary fuel tank module (1). Refer to «Fuel Tank Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Disconnect the fuel feed hose quick connect fitting (4) from the primary fuel tank module. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
3. Remove the fuel feed hose (2) from the retainer on the fuel tank and position the hose aside.
4. Release the interlock and disconnect the electrical connector (3) from the primary fuel tank module.
5. Remove the wire harness (1) from the retainer on the fuel tank and position the harness aside.
6. Use the J 45722: wrench (2) and a long breaker-bar (1) in order to unlock the fuel tank module lock ring (3), by turning counterclockwise.
7. Remove the cam lock ring.
8. Partially remove the fuel tank module in order to disconnect the fuel transfer hose quick connect fitting (1) and the electrical connector (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
9. Remove the primary fuel tank module from the fuel tank.
10. Discard the fuel tank module seal.
11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gauge at 7 points.
12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

1. Install a NEW fuel tank module seal.
2. Grasp the fuel transfer hose and electrical connector from inside the fuel tank.
3. Partially install the primary fuel tank module and connect the fuel transfer hose quick connect fitting (1) and the electrical connector (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
4. Press the primary fuel tank module downward, aligning the module to the encapsulated ring.
5. Position the cam lock ring (3) to the fuel tank.
6. Use the J 45722: wrench (2) and a long breaker-bar (1) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated.
7. Connect the electrical connector (3) to the primary fuel tank module and engage the connector interlock.
8. Install the wire harness (1) to the retainer on the fuel tank.
9. Connect the fuel feed hose quick connect fitting (4) to the primary fuel tank module. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
10. Install the fuel feed hose (2) to the retainer on the fuel tank.
11. Install the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

J 45722: Fuel Sender Lock Ring Wrench

1. Remove the fuel tank in order to gain access to the secondary fuel tank module (2). Refer to «Fuel Tank Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Release the interlock and disconnect the electrical connector (1) from the secondary fuel tank module. Position the connector and wire harness aside.
3. Use the J 45722: Fuel Sender Lock Ring Wrench (1) and a long breaker-bar (2) in order to unlock the fuel tank module lock ring (3), by turning counterclockwise.
4. Remove the cam lock ring.
5. Partially remove the secondary fuel tank module and disconnect the electrical connector (1).
6. Disconnect the fuel transfer hose quick connect fitting (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
7. Remove the secondary fuel tank module from the fuel tank.
8. Discard the fuel tank module seal.
9. If replacing the remote pickup line assembly, Disconnect the transfer hose quick connect fitting (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
10. Remove the remote pickup line assembly (1).
11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gauge at 7 points.
12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

1. If replacing, install the remote pickup line assembly (1).
2. If replacing the remote pickup line assembly, Connect the transfer hose quick connect fitting (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
3. Install a NEW fuel tank module seal (4).
4. Grasp the fuel transfer hose from inside the fuel tank.
5. Partially install the secondary fuel tank module (2) to the fuel tank.
6. Connect the fuel transfer hose quick connect fitting (1) to the port on the fuel tank module.
7. Press the secondary fuel tank module downward, aligning the module to the encapsulated ring.
8. Position the cam lock ring (3) to the fuel tank.
9. Use the J 45722: wrench (1) and a long breaker-bar (2) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated.
10. Connect the electrical connector (1) to the secondary fuel tank module and engage the connector interlock.
11. Install the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

1. Remove the fuel tank pump module. Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Press in the locking tab (1) and disconnect the fuel level sensor electrical connector.
3. Disconnect the fuel level sensor electrical connector (1).
4. Disengage the locking tab (1) on the fuel level sensor by pushing inward.
5. Slide the fuel level sensor (1) upward to the stationary lock (2).
6. Remove the fuel level sensor (1).

1. Install the fuel level sensor (1).
2. Slide the fuel level sensor (1) downward until the locking tab (2) locks into place.
3. Connect the fuel level sensor electrical connector (1).
4. Install the fuel tank pump module. Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

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 (With CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) or «Fuel Pressure Relief (Without CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-pressure-relief-without-ch-48027) .
2. Remove the fuel pipe retaining clip from the fuel pipe. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__metal-collar-quick-connect-fitting-service) .
3. Disconnect the fuel pipe (2) from the fuel rail. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
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»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
6. Disconnect the fuel pipes from 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 EVAP hose from the retainer.
12. Remove the bolts securing the transmission support to the underbody, from the right side only.
13. Pull the right side transmission support down only enough to allow removal of the chassis fuel hose/pipes.
14. Partially lower the hoist only enough to simultaneously gain access to both the front and rear portions of the chassis fuel hose/pipes.
15. 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. Pull the right side transmission support down only enough to allow installation of the chassis fuel hose/pipes.
4. Install the transmission support right side bolts. Refer to «Transmission Support Replacement (Automatic CTS-V)»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__transmission-support-replacement-automatic-cts-v) or «Transmission Support Replacement (Manual CTS-V)»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody__transmission-support-replacement-manual-cts-v) .
5. Install the EVAP hose to the retainer.
6. Install the fuel/brake bundle to the underbody.
7. 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.
8. Install the chassis hose/pipes into the retainers (1) located at the forward portion of the rail.
9. Close the retainers.
10. Push the locking mechanism (1) inward in order to engage the fuel/brake bundle chassis pipe retainers to the rail.
11. Connect the fuel feed pipe and the EVAP hose to the fuel bundle.
12. Lower the vehicle.
13. Connect the evaporative emission (EVAP) purge line (3) to the purge solenoid.
14. Connect the fuel feed pipe (1) to the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__metal-collar-quick-connect-fitting-service) .
15. Install the fuel pipe retaining clip.

Scheme 87

Fuel System Cleaning

The following procedure covers the disassembly and the inspection of the complete fuel supply system. If the fuel system is contaminated, the fuel system can be cleaned. You can usually determine the extent of the fuel system contamination during the disassembly.

1. Remove the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Remove the fuel lever sender assembly. Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions)
3. Locate the tank in a suitable work area away from any heat, any flame, or any other source of ignition.
4. Perform the following procedures: Inspect the fuel sender strainer. Replace the primary fuel tank module if the strainer is contaminated. Inspect the secondary fuel tank module for debris. Clean the secondary fuel tank module if debris is found. WARNING: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury. Use compressed air in order to apply air pressure to the transfer tube.
5. Flush the fuel tank with running hot water for at least five minutes. Pour the water out of the fuel sender assembly opening. Rock the tank in order to ensure that the removal of the water from the tank is complete.
6. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__metal-collar-quick-connect-fitting-service) in order to disconnect the following quick connect fittings from the fuel rail: The feed hose/pipe The return hose/pipe
7. Use compressed air in order to apply air pressure to the fuel lines in the opposite direction from the normal fuel flow.
8. Remove the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
9. Clean and inspect the fuel injectors and fuel rail.

Assemble the fuel system as follows

1. Install the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Install the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement - Right Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
3. Install the fuel lever sender assembly. Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions)
4. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__metal-collar-quick-connect-fitting-service) in order to connect the following quick connect fittings to the fuel rail: The feed hose/pipe The return hose/pipe

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the front and rear intake manifold covers. Refer to «Intake Manifold Cover Replacement - Rear»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
3. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (With CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) or «Fuel Pressure Relief (Without CH 48027)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__fuel-pressure-relief-without-ch-48027)
4. Disconnect the fuel pipe from the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__metal-collar-quick-connect-fitting-service)
5. Disconnect the fuel injection Harness connectors (1, 2).
6. Disconnect the BARO sensor harness connector (5).
7. Disconnect the intake temperature sensor harness connector (4).
8. Disconnect the supercharger air outlet pressure sensor harness connector (3).
9. Disconnect all 8 ignition coil harness connectors (1).
10. Remove the front fuel rail fastener.
11. Remove the fuel rail ball stud fasteners (1).
12. Carefully disengage the fuel injectors from the supercharger.
13. Remove the fuel rail wit the fuel injector harness from the engine.
14. Remove the fuel injection wiring harness (1, 2) from the fuel rail and fuel injectors.
15. If replacing the fuel rail of an injector. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

1. Install the fuel injectors if removed. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
2. Install the fuel injection wiring harness (1, 2) to the fuel rail and fuel injectors.
3. install the fuel rail wit the fuel injector harness (2) to the engine.
4. Carefully locate the fuel injectors into the supercharger. Install the left side first and then the right side.
5. Apply threadlock to the ball stud and fastener threads. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-specifications__adhesives-fluids-lubricants-and-sealers) .
6. Instal the ball studs (1) and the forward fastener and tighten to 10 N.m (89 lb in).
7. Connect all 8 ignition coil harness connectors (1).
8. Connect the fuel injection Harness connectors (1, 2).
9. Connect the barometric pressure sensor harness connector (5).
10. Connect the supercharger air output sensor harness connector (3).
11. Connect the intake temperature sensor harness connector (4).
12. Connect the fuel pipe to the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__metal-collar-quick-connect-fitting-service)
13. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
14. Pressure the fuel system and check for fuel leaks.
15. Install the front and rear intake manifold covers. Refer to «Intake Manifold Cover Replacement - Rear»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .

Scheme 88

Fuel Injector Cleaning

Special Tools

1. J 37287 Fuel Line Shut-Off Adapters
2. J 35800-A Fuel Injector Cleaner
3. J 42873-1 3/8 Fuel Line Shut-Off Valve
4. J 42873-2 5/16 Return Pipe Shut-Off Valve
5. J 42964-1 3/8 Fuel Pipe Shut-Off Valve
6. J 42964-2 5/16 Fuel Pipe Shut-Off Valve

Note. Vehicles with less than 160 km (100 mi) on the odometer should not have the injectors cleaned. These vehicles should have the injectors replaced.

1. Obtain J 35800-A (2).
2. For 4, 5, and 6 cylinder engines, empty two of the 30 ml (1 oz) reservoirs of the GM Upper Engine and Fuel Injector Cleaner twin reservoir container into the J 35800-A , injector cleaning tank, then add 420 ml (14 oz) of regular unleaded gasoline. If you are using any other brand of cleaning tank, you will need a total of 60 ml (2 oz) of GM Upper Engine and Fuel Injector Cleaner mixed with 420 ml (14 oz) of regular unleaded gasoline.
3. For 8 cylinder engines, empty two of the 30 ml (1 oz) reservoirs of the GM Upper Engine and Fuel Injector Cleaner twin reservoir container into the J 35800-A , injector cleaning tank, then add 420 ml (14 oz) of regular unleaded gasoline. If you are using any other brand of cleaning tank, you will need a total of 60 ml (2 oz) of GM Upper Engine and Fuel Injector Cleaner mixed with 420 ml (14 oz) of regular unleaded gasoline. This procedure will need to be repeated for an 8 cylinder engine. The 8 cylinder engines receive 960 ml total fluid-120 ml (4 oz) of GM Upper Engine and Fuel Injector Cleaner and 840 ml (28 oz) of gasoline.
4. Fill the injector cleaning tank with regular unleaded gasoline. Be sure to follow all additional instructions provided with the tool.
5. Electrically disable the vehicle fuel pump by removing the fuel pump relay and disconnecting the oil pressure switch connector, if equipped.
6. Disconnect the fuel feed and return line, if equipped, at the fuel rail. Plug the fuel feed and return line, if equipped, coming off the fuel rail with J 37287 , or J 42964-1 , and J 42964-2 or J 42873-1 , and J 42873-2 as appropriate for the fuel system.
7. Connect the J 35800-A to the vehicle fuel rail.
8. Pressurize the J 35800-A to 510 kPa (75 psi).
9. Start and idle the engine until it stalls due to lack of fuel. This should take approximately 15-20 minutes.
10. Turn the ignition to the OFF position.
11. Injectors should be flow-tested at this point. If further cleaning is needed, a repeat of the above procedure should be done. When the injector restriction returns to zero, proceed to step 12.
12. Disconnect the J 35800-A from the fuel rail.
13. Reconnect the vehicle fuel pump relay and oil pressure switch connector, if equipped.
14. Remove the J 37287 , or J 42964-1 and J 42964-2 , or J 42873-1 and J 42873-2 and reconnect the vehicle fuel feed and return lines.
15. Start and idle the vehicle for an additional two minutes to ensure residual injector cleaner is flushed from the fuel rail and fuel lines.
16. Pour the entire contents of GM Fuel System Treatment Plus, GM P/N 88861011 (Canadian P/N 88861012) into a nearly empty tank and advise the customer to refuel with up to 76 L (20 gal) of fuel.
17. Advise the customer to use only a Top Tier Detergent gasoline and to add a bottle of GM Fuel System Treatment Plus to the fuel tank at every oil change. Regular use of GM Fuel System Treatment Plus should keep the customer from having to repeat the injector cleaning procedure.
18. Road test the vehicle to verify that the customer concern has been corrected.

Scheme 89

1. Remove the exhaust system. Refer to «EXHAUST SYSTEM REPLACEMENT (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system)
2. Steps 3-5 apply to Sedan/Wagon only. Proceed to step 6 for Coupe
3. Place a jack stand under the rear differential assembly
4. Remove the two front differential mounting bolts.
5. Lower the differential slightly to provide additional clearance to the Evap canister
6. Remove the two EVAP canister retaining nuts and lower the rear of the canister enough to clear the weld studs
7. Slide the canister rearward from the body brace to gain access to the canister vent valve
8. Clean away any debris that may be present around the EVAP canister vent valve
9. Disconnect the electrical connector from the EVAP canister vent valve
10. Twist the EVAP canister vent valve counterclockwise
11. Pull the EVAP canister vent valve from the EVAP canister

Scheme 90

1. Insert the EVAP canister vent valve into the EVAP canister
2. Twist the EVAP canister vent valve clockwise into the locked position
3. Connect the electrical connector to the EVAP canister vent valve
4. Attach the EVAP canister to the body by inserting the fresh air tube and tab on the canister forward into the body brace.
5. Rotate the rear of the canister up over the 2 weld studs on the floor pan
6. Install the EVAP canister to the body and install the bolts and tighten to 6 N.m (53 lb in).
7. Sedan/Wagon only: Raise the rear differential into position and install the front mounting bolts (1) and tighten to 175 N.m (129 lb ft).
8. Install the exhaust system. Refer to «EXHAUST SYSTEM REPLACEMENT (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system)

Scheme 91

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
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»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .

1. Remove the rear frame. Refer to «Rear Frame Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#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 and tighten 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 «Rear Frame Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .

Scheme 92

Spark Plug Wire Inspection

Spark plug wire integrity is vital for proper engine operation. A thorough inspection will be necessary to accurately identify conditions that may affect engine operation. Inspect for the following conditions

1. Any signs of cracks or splits in the wires.
2. Inspect each boot for the following conditions: Tearing Piercing Arcing Carbon tracking Corroded terminal

If corrosion, carbon tracking, or arcing are indicated on a spark plug wire boot or on a terminal, replace the wire and the component connected to the wire.

1. Disconnect the spark plug wires at each spark plug: Twist each spark plug boot 1/2 turn. Pull only on the boot in order to remove the wire from each spark plug.
2. Disconnect the spark plug wires from the ignition coil: Twist each spark plug boot 1/2 turn. Pull only on the boot in order to remove the wires from the ignition coil.

1. Install the spark plug wires at the ignition coil.
2. Install the spark plug wire to each spark plug.
3. Inspect the wires for proper installation: Push sideways on each boot in order to inspect the seating. Reinstall any loose boot.

Spark Plug Usage

1. Verify that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to «Ignition System Specifications»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-specifications__ignition-system-specifications) for the correct spark plug.
2. Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions: Spark plug fouling - colder plug Pre-ignition causing spark plug and/or engine damage - hotter plug

Spark Plug Inspection

1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
2. Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
4. Inspect for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. Refer to «Ignition System Specifications»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-specifications__ignition-system-specifications) . An excessively-wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Refer to «Ignition System Specifications»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-specifications__ignition-system-specifications) . Insufficient torque can prevent correct spark plug operation. An over-torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug. A rattling sound indicates internal damage. A loose center electrode (4) reduces the spark intensity. Inspect for bridged electrodes (3, 4). Deposits on the electrodes reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4), if equipped. Inspect for excessive fouling.
5. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

1. Normal operation - Brown to grayish-tan with small amounts of white powdery deposits are normal combustion by-products from fuels with additives.
2. Carbon Fouled - Dry, fluffy black carbon, or soot caused by the following conditions: Rich fuel mixtures Leaking fuel injectors Excessive fuel pressure Restricted air filter element Incorrect combustion Reduced ignition system voltage output Weak coils Worn ignition wires Incorrect spark plug gap Excessive idling or slow speeds under light loads can keep spark plug temperatures so low that normal combustion deposits may not burn off.
3. Deposit Fouling - Oil, coolant, or additives that include substances such as silicone, very white coating, reduces the spark intensity. Most powdery deposits will not effect spark intensity unless they form into a glazing over the electrode.

1. Remove the Intake manifold front cover. Refer to «Intake Manifold Cover Replacement - Front»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
2. Remove the spark plug wires. Refer to «Spark Plug Wire Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
3. Loosen each spark plug 1 or 2 turns.
4. Brush or use compressed air to remove any dirt around the spark plugs.
5. Remove the spark plugs one at a time and place each plug in a tray marked with the corresponding cylinder numbers.

1. Inspect each spark plug gap and adjust as needed. Refer to «Ignition System Specifications»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-specifications__ignition-system-specifications) .
2. Hand start the spark plugs in the corresponding cylinders.
3. Tighten the spark plugs. For cylinder head-new: Tighten the spark plugs to 20 N.m (15 lb ft). For cylinder head-all subsequent installations: Tighten the spark plugs to 15 N.m (11 lb ft).
4. Install the spark plug wires. Refer to «Spark Plug Wire Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
5. Install the Intake manifold front cover. Refer to «Intake Manifold Cover Replacement - Front»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
3. Remove the starter. Refer to «Starter Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Disconnect the crankshaft position (CKP) sensor electrical connector.
5. Remove the CKP sensor retaining bolt.
6. Remove the CKP sensor.

1. Install the CKP sensor.
2. Install the CKP sensor retaining bolt and tighten to 25 N.m (18 lb ft).
3. Connect the CKP sensor electrical connector.
4. Install the starter. Refer to «Starter Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
5. Lower the vehicle.
6. Connect the negative battery cable.
7. Perform the CKP System Variation Learn Procedure. Refer to «Crankshaft Position System Variation Learn»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions__crankshaft-position-system-variation-learn) .

1. Remove the generator bracket assembly. Refer to «Generator Bracket Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the camshaft position sensor mounting bolts (1).
3. Remove the camshaft position sensor assembly (4, 5, 6) from the front cover (7).
4. Disconnect the camshaft position sensor jumper harness (2) and the engine harness (3) electrical connectors.
5. Remove the camshaft sensor assembly (4, 5, 6).
6. Disconnect camshaft position sensor (5) from the jumper harness (4).

1. Reconnect the camshaft sensor (5) and the jumper harness (4).
2. Install the O-ring (6) on the camshaft sensor assembly (4 and 5).
3. Reconnect the camshaft position sensor assembly (4, 5 and 6) and the engine harness connector (3).
4. Install the camshaft position sensor assembly (4, 5 and 6) in the front cover (7).
5. Install the camshaft position sensor mounting bolts and tighten to 25 N.m (18 lb ft).
6. Install the generator assembly. Refer to «Generator Bracket Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Remove the left catalytic convertor. Refer to «Catalytic Converter Replacement - Left Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
3. Remove the left exhaust manifold. Refer to «Exhaust Manifold Replacement - Left Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
4. Remove the mounting bolt for the knock sensor 1.
5. Disconnect the electrical connector of the knock sensor from the engine harness (3).
6. Remove the knock sensor (2) from the engine block (4).

1. Reconnect the engine harness (3) and the knock sensor (2) electrical connectors.
2. Position the knock sensor 2 on the engine block (4).
3. Install the mounting bolt (1) for the knock sensor 2.
4. Tighten the knock sensor mounting bolt (1) and tighten to 20 N.m (15 lb ft).
5. Install the left exhaust manifold. Refer to «Exhaust Manifold Replacement - Left Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
6. Install the left catalytic convertor. Refer to «Catalytic Converter Replacement - Left Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
7. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (Sedan,Wagon)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .

1. Remove the right exhaust manifold. Refer to «Exhaust Manifold Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
2. Remove the right catalytic convertor. Refer to «Catalytic Converter Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
3. Remove the starter assembly (4), ONLY IF NEEDED. Refer to «Starter Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Remove the knock sensor mounting (1).
5. Remove the knock sensor (2) from the engine block (5).
6. Disconnect the engine electrical connector (3) from the knock sensor (2).
7. Remove the knock sensor (2).

1. Reconnect electrical connector (3) for the engine harness to the knock sensor (2).
2. Position the knock sensor (2) on the engine block (5).
3. Install the mounting bolt (1) for the knock sensor (2).
4. Tighten the knock sensor mounting bolt (1) and tighten to 20 N.m (15 lb ft).
5. Install the starter assembly (4), ONLY IF REMOVED. Refer to «Starter Replacement (LSA)»(/cadillac/cts/ii-2007-2014/remont/charging-system/#battery-charging-system-and-starting-system) .
6. Install the right catalytic convertor. Refer to «Catalytic Converter Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
7. Install the right exhaust manifold. Refer to «Exhaust Manifold Replacement - Right Side (LSA)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Scheme 98

See also:
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• DTC P0315
• Lifting and Jacking the Vehicle
• Cooling System Draining and Filling (Static Fill LSA)
• Cooling System Draining and Filling (GE 47716 LSA)
• Fastener Caution
• Intake Manifold Cover Replacement - Front
• Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution
• Catalytic Converter Replacement - Right Side (LSA)
• Instrument Panel Insulator Replacement - Left Side (Left Hand Drive)
• Gasoline/Gasoline Vapors Warning
• Relieving Fuel Pressure Warning
• Electrical Center Identification Views
• Fuel Pressure Relief
• Safety Glasses Warning
• Fuel Pipe Fitting Warning
• Rear Compartment Side Trim Panel Replacement
• Tire and Wheel Removal and Installation
• Rear Wheelhouse Panel Liner Replacement
• Component Fastener Tightening Caution
• Rear Propeller Shaft Replacement (RPO LSA)
• Fuel Tank Replacement
• Metal Collar Quick Connect Fitting Service
• Transmission Support Replacement (Automatic CTS-V)
• Transmission Support Replacement (Manual CTS-V)
• Battery Negative Cable Disconnection and Connection (Sedan,Wagon)
• Adhesives, Fluids, Lubricants, and Sealers
• Ignition System Specifications
• Battery Disconnect Warning
• Front Compartment Side Sight Shield Replacement
• Power Steering Pump Replacement (V6)
• Supercharger Assemble
• Air Cleaner Resonator Outlet Duct Replacement
• Fuel Pressure Relief (Without CH 48027)
• Fuel Tank Draining
• Metal Collar Quick Connect Fitting Service
• Crankshaft Position System Variation Learn