Engine Controls and Fuel - 3.0l or 3.6l - Repair Instructions Cadillac CTS II

Crankshaft Position System Variation Learn (w/LF1)

Note. The Crankshaft Position System Variation Learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set: An engine replacement A engine control module (ECM) replacement A crankshaft balancer replacement A crankshaft replacement A crankshaft position sensor replacement Any engine repairs which disturb the crankshaft to crankshaft position sensor relationship.

Note. The ECM monitors certain component signals to determine if all the conditions are met to continue with the crankshaft position System Variation Learn Procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool displays the signals of 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 signal activity-If there is a camshaft position sensor signal condition, refer to the applicable DTC that set. Engine coolant temperature (ECT)-If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.

1. Install a scan tool.
2. Monitor the 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. With a scan tool, select the Crankshaft Position System Variation Learn Procedure and perform the following: Block drive wheels. Set parking brake. DO NOT apply brake pedal. Cycle ignition from OFF to ON. Apply and hold brake pedal for the duration of the procedure. Start and idle engine. Turn the air conditioning (A/C) OFF. The vehicle must remain in Park or Neutral. NOTE: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete. Accelerate to wide open throttle (WOT) and release when the fuel cut-off occurs.
4. 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, or another DTC is present, 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) and perform the appropriate diagnostic procedure.
5. Once the learn procedure has successfully completed, and in order to store the crankshaft position system variation values in the ECM, turn OFF the ignition and verify all vehicle systems are OFF. This may take up to 2 minutes.

Engine Control Module Replacement

Service of the engine control module (ECM) should consist of either replacement of the ECM of programming of the electrically erasable programmable read only memory (EEPROM). If the diagnostic procedures call for the ECM to be replaced, the replacement ECM should be checked to ensure that the correct part is being used. If the correct part is being used, remove the faulty ECM and install the new service ECM.

Note. It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.

Note. It is necessary to record the remaining automatic transmission fluid life. If the replacement module is not programed with the remaining automatic transmission fluid life, the automatic transmission fluid life will default to 100 percent. If the replacement module is not programmed with the remaining automatic transmission fluid life, the automatic transmission fluid will need to be changed at 83000 km (50,000 mi) from the last automatic transmission fluid change.

Removal Procedure

1. Using a scan tool, retrieve the percentage of remaining engine oil and automatic transmission fluid life. Record the remaining engine oil and automatic transmission fluid life.
2. 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) .
3. Unlock and disconnect the engine wiring harness electrical connectors (1) from the ECM (2).
4. Use the tabs (3) in order to disengage the retainers (2) on the ECM bracket from the ECM (1) and remove the ECM.
5. If replacing the ECM bracket perform the following steps, otherwise proceed to step 4 in the installation procedure.
6. Using a small flat-bladed tool, depress the locking tabs (1) on the ECM bracket.
7. Slide up and remove the ECM bracket (1).

Installation Procedure

1. If replacing the ECM bracket perform the following steps, other wise proceed to step 4.
2. Slide down and install the ECM bracket (1).
3. Ensure that the ECM bracket engages the locking tabs (1).
4. Slide the ECM (1) into the ECM bracket, ensure that the ECM engages the bracket retainers (2).
5. Connect and lock the engine wiring harness electrical connectors (1) to the ECM (2).
6. 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) .
7. Program the ECM, if required. Refer to «Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .
8. Turn OFF the ignition for a least 5 seconds after the programming event is complete.
9. If equipped with a manual transmission, perform the clutch pedal position sensor learn procedure. Refer to «Clutch Pedal Position Sensor Learn»(/cadillac/cts/ii-2007-2014/remont/manual-trans/#manual-transmission-aisin-ay6__clutch-pedal-position-sensor-learn) .

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.

The engine control module (ECM) learns the idle position of the throttle body to ensure the correct idle operation. Anytime the ECM or the throttle body is replaced, the ECM must learn the idle position. The engine idle may be unstable or a DTC may set if the idle position is not learned.

Conditions for Running the Idle Learn Procedure

1. DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0638, P2100, P2101, P2105, and P2119 are not set.
2. The engine speed is less than 40 RPM.
3. The vehicle speed is 0 km/h (0 mph).
4. The accelerator pedal position is less than 14.9 percent.
5. The ignition 1 voltage is more than 10 volts.
6. The engine coolant temperature is between 5-85°C (41-185°F).
7. The intake air temperature is between 5-60°C (41-140°F).

Idle Learn Procedure

1. Turn OFF the ignition for 30 seconds.
2. Turn ON the ignition, with the engine OFF for 60 seconds.
3. Turn OFF the ignition.
4. Turn ON the ignition, with the engine OFF.
5. Clear the DTCs with a scan tool.

Scheme 39

1. Turn the ignition OFF.
2. Remove the engine oil dipstick indicator.
3. Slide the electrical connector heat protector (1) off the electrical connector.
4. Disconnect the coolant temperature sensor electrical connector.
5. Remove the coolant temperature sensor.

1. Install the coolant temperature sensor and tighten to 22 N.m (16 lb ft).
2. Install the coolant temperature sensor electrical connector.
3. Slide the electrical connector heat protector (1) onto the electrical connector.
4. Inspect and fill the cooling system as necessary. Refer to «Cooling System Draining and Filling (Static Fill LF1, LLT)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (GE 47716 LF1, LLT)»(/cadillac/cts/ii-2007-2014/remont/cooling-system-mechanical/#engine-cooling-system__cooling-system-draining-and-filling-ge) .

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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) .

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Throttle Body Inspection and Cleaning

1. Remove the air cleaner intake duct. Refer to «Air Cleaner Outlet Duct Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Air Cleaner Outlet Duct Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
2. Fully open the throttle valve in order to Inspect the throttle body bore and the throttle valve plate for any deposits.
3. Use a clean shop towel and Top Engine Cleaner GM P/N 1052626 or equivalent product in order to clean the throttle body bore and the throttle valve plate. If necessary, use a parts cleaning brush in order to remove heavy deposits.
4. Install the air cleaner duct. Refer to «Air Cleaner Outlet Duct Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Air Cleaner Outlet Duct Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
5. Perform the throttle learn procedure. Refer to «Throttle/Idle Learn (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Throttle/Idle Learn (Without LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

Fuel Pressure Relief

1. Install a scan tool to the vehicle and command the fuel pump relay OFF, allowing the low pressure fuel pump to shut off.
2. Start the vehicle and allow the engine to idle until the engine stops. The engine will stop in approximately 20-30 seconds.
3. Turn the ignition OFF.
4. Using the scan tool, verify that there is little to no fuel pressure, if there still is fuel pressure repeat step 2.

Special Tools

CH-48027-100 Digital Pressure Gauge

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. 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-48027-100 , refer to the manufacture's directions.

1. Relieve the fuel system pressure, if required. Perform the following steps: 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 (3).
4. Disconnect the CH-48027-3 (3) 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.

Metal Collar Quick Connect Fitting Service

Special Tools

1. J 37088-A Fuel Line Disconnect Tool Set
2. J 44581 Fuel Line Disconnect Tool. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .

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 . See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) . Insert the J 37088-A or J 44581 into the female connector, then push inward to release the locking tabs. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .
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.

CH-45004: Fuel Tank Drain Hose

For equivalent regional tools, refer to Special Tools .

1. Remove the fuel fill cap.
2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#general-information) .
3. Loosen the fuel fill pipe hose clamps and slide the fill pipe hose up the filler pipe.
4. Insert the CH-45004: fuel tank drain hose into the fuel tank until the hose reaches the bottom of the fuel tank.
5. Use an hand or air operated pump device in order to drain as much fuel as possible.

1. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
2. 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) .
3. Remove the exhaust system. Refer to «Exhaust System Replacement (LF1)»(/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) or «Exhaust System Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
4. Remove the rear propeller shaft. Refer to «Rear Propeller Shaft Replacement (RPO LLT/LF1with MX7 or MN6)»(/cadillac/cts/ii-2007-2014/remont/driveshaft-universal-joints/#propeller-shaft) or «Rear Propeller Shaft Replacement (RPO LLT, LF1 with MXO)»(/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 «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
8. Disconnect the fuel feed pipe (1) from the chassis bundle. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
9. Disconnect the fuel EVAP hose (2) from the chassis bundle. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
10. Release the electrical connector interlock and disconnect the fuel tank electrical connector.
11. Remove the fuel tank electrical connector retainer from the chassis.
12. Remove the fuel tank electrical harness from the chassis mounted retainer.
13. Disconnect the EVAP hoses from the EVAP canister.
14. Pull outward on the retainer tab in order to disengage the retainer from the chassis.
15. Disconnect the electrical connector from the fuel tank pressure sensor (1).
16. Disconnect the electrical connector from the EVAP canister vent valve.
17. Support the fuel tank with a suitable jack.
18. Remove the fuel tank strap bolts.
19. Remove the fuel tank straps.
20. With the aid of an assistant, carefully lower the fuel tank from the vehicle.
21. Remove the following components if replacing just the fuel tank: The right 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-30l-or-36l-repair-instructions) . The left fuel level sensor assembly-Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

1. Install the following components if fuel tank replacement was necessary: The right 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-30l-or-36l-repair-instructions) . The left fuel level sensor assembly-Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-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 «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-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) to the chassis bundle. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
12. Connect the fuel feed pipe (1) to the chassis bundle. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
13. Install the rear frame assembly (2). Refer to «Rear Frame Replacement»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
14. Install the propeller shaft. Refer to «Rear Propeller Shaft Replacement (RPO LLT/LF1with MX7 or MN6)»(/cadillac/cts/ii-2007-2014/remont/driveshaft-universal-joints/#propeller-shaft) or «Rear Propeller Shaft Replacement (RPO LLT, LF1 with MXO)»(/cadillac/cts/ii-2007-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
15. Install the exhaust system. Refer to «Exhaust System Replacement (LF1)»(/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) or «Exhaust System Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) .
16. Refill the fuel tank.
17. Inspect for fuel leaks.

J 45722 Fuel Sender Lock Ring Wrench. See Special Tools .

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-30l-or-36l-repair-instructions) .
2. Disconnect the electrical connector (1) and the fuel feed line (2) 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-30l-or-36l-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 (2) and a long breaker-bar (1) in order to unlock the fuel tank module lock ring (3), by turning counterclockwise. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .
7. Remove the cam lock ring.
8. Partially remove the primary fuel tank module and 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-30l-or-36l-repair-instructions) .
9. Remove the primary fuel tank module from the fuel tank.
10. Discard the fuel tank module seal (3).
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 (3).
2. Grasp the fuel transfer hose from inside the fuel tank.
3. Partially install the primary fuel tank module and connect the fuel transfer hose (2).
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 (2) and a long breaker-bar (1) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .
7. Connect the electrical connector (1) and the fuel feed line (2).
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-30l-or-36l-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) .

Scheme 56

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.

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-30l-or-36l-repair-instructions) .
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 «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-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 «Plastic Collar Quick Connect Fitting Service»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-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.

J 45722 Fuel Sender Lock Ring Wrench. See Special Tools .

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-30l-or-36l-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 (1) and a long breaker-bar (2) in order to unlock the fuel tank module lock ring (3), by turning counterclockwise. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .
4. Remove the cam lock ring.
5. Partially remove the secondary fuel tank module (2) in order to gain access to the fuel transfer hose quick connect fitting (1). Use care not to damage the float arm (3).
6. Disconnect the fuel transfer hose quick connect fitting (1).
7. Remove the secondary fuel tank module from the fuel tank.
8. Discard the fuel tank module seal (4).
9. 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.
10. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
11. 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 (4).
2. Grasp the fuel transfer hose from inside the fuel tank.
3. Partially install the secondary fuel tank module (2) to the fuel tank.
4. Connect the fuel transfer hose quick connect fitting (1) to the port on the fuel tank module.
5. Press the secondary fuel tank module downward, aligning the module to the encapsulated ring.
6. Position the cam lock ring (3) to the fuel tank.
7. Use the J 45722 (1) and a long breaker-bar (2) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated. See «Special Tools»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-special-tools-and-equipment) .
8. Connect the electrical connector (1) to the secondary fuel tank module and engage the connector interlock.
9. 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) .

Scheme 57

Scheme 58

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»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-pressure-relief) .
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 «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) .
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 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»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#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 (Manual except CTS-V)»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «Transmission Support Replacement (Automatic RWD except CTS-V)»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) or «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) or «Transmission Support Replacement (Automatic AWD)»(/cadillac/cts/ii-2007-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Install the EVAP hose to the fuel filter bracket
7. Install the fuel filter bracket bolt and tighten 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 «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) .
17. Install the fuel pipe retaining clip.

Scheme 59

Scheme 60

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 right 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-30l-or-36l-repair-instructions) .
2. Remove the left fuel level sensor assembly. Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-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 tank pump module strainer. Replace the primary fuel tank module if the strainer is contaminated. Inspect the left fuel level sensor assembly for debris. Clean the left fuel level sensor assembly 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-30l-or-36l-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 and fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) and «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
9. Clean and inspect the fuel injectors and fuel rail.

Assemble the fuel system as follows

1. Install the fuel injectors and fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) and «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
2. Install the right 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-30l-or-36l-repair-instructions) .
3. Install the left fuel level sensor assembly. Refer to «Fuel Level Sensor Replacement - Left Side»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions)
4. 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) in order to connect the following quick connect fittings to the fuel rail: The feed hose/pipe The return hose/pipe

Scheme 61

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 intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
3. Remove the foam insulator from the fuel rails.
4. Using a 27 mm socket, remove the fuel pressure sensor (1) from the fuel injection fuel rail (2). Discard the fuel pressure sensor.
5. Allow any fuel to drain from the fuel rail and pressure sensor location.
6. Dry the sealing cone in the fuel rail and the area around the sensor joint with a lint free cloth.
7. Inspect the sealing cone in the fuel rail. The surface should be free of fuel, debris, and burrs.

Note. Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached hexagon.

Note. Ensure that the fuel rail threads have been cleaned of any excess fuel, or the NEW fuel injection fuel rail fuel pressure sensor will NOT seal properly.

1. Lubricate the threads and the sealing cone in the fuel rail with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__adhesives-fluids-lubricants-and-sealers) .
2. Lubricate the threads and sealing cone on the NEW fuel injection fuel rail fuel pressure sensor with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
3. Install the NEW fuel pressure sensor (1) to the fuel injection fuel rail (2) hand tight.
4. Remove the NEW fuel injection fuel rail fuel pressure sensor, re-lubricate following steps 1 and 2 above.
5. Install the NEW fuel pressure sensor (1) to the fuel injection fuel rail (2) and tighten to 33 N.m (25 lb ft).
6. Install the foam insulator from the fuel rails.
7. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
8. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.

EN-49248: Injector Rail Assembly Remover

For equivalent regional tools, refer to Special Tools .

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 fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
4. Remove the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
5. Remove the cylinder head. Refer to «Cylinder Head Replacement - Left Side (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-2-of-2) .
6. Remove the foam insulator from the fuel rails.
7. Disconnect the fuel pressure sensor electrical connector and cut the wire harness tie straps.
8. Remove the fuel rail bolts (1).
9. Remove the fuel rail and injectors (1) as an assembly using the EN-49248: remover.
10. Remove the fuel pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
11. Remove and discard the direct fuel injector hold down clamps.
12. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-off-vehicle-2-of-4__fuel-rail-and-injectors-cleaning-and) .

1. Install the fuel rail with injectors (2) into the cylinder head evenly.
2. Install NEW direct injector hold down clamps to the injector.
3. Hand tighten the two outer fuel rail bolts to seat the injector in the injector bores.
4. Start and hand tighten the remaining fuel rail bolts and tighten the fuel rail bolts (1).
5. Tighten the fuel rail bolts in the sequence shown: Tighten the Bank 1 fuel rail bolts first pass to 12 N.m (106 lb in). Tighten the Bank 1 fuel rail bolts final pass to 23 N.m (17 lb ft).
6. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
7. Install the high pressure fuel sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
8. Connect the fuel injector wiring harness electrical connector to the fuel injectors, fuel rail and fuel pressure sensor.
9. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
10. Install the foam insulator to the fuel rails.
11. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
12. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
13. Install the cylinder head. Refer to «Cylinder Head Replacement - Left Side (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-2-of-2) .
14. Install the low side fuel pressure service port cap.
15. Install the fuel tank cap.

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 fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
4. Remove the crossover tube. Refer to «Fuel Injection Fuel Rail Crossover Tube Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
5. Remove the foam insulator from the fuel rails.
6. Disconnect the fuel pressure sensor electrical connector and cut the wire harness tie straps.
7. Remove the fuel rail (1) bolts (2).
8. Remove the fuel pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
9. Remove and discard the direct fuel injector hold down clamps.
10. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-injector-replacement) .

1. Install the rebuilt direct fuel injectors (1) to the cylinder heads. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-injector-replacement) .
2. Install NEW direct injector hold down clamps to the injector.
3. On a new fuel rail, lubricate the fuel injector cups with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__adhesives-fluids-lubricants-and-sealers) .
4. Carefully place the fuel rail (1) into position, placing the front into the fuel rail over the front injector and rotating the rear downward.
5. Install the 2 outer fuel rail bolts first, then the 2 inner bolts, and hand tighten.
6. Tighten the fuel rail bolts in the sequence shown: Tighten: Tighten the Bank 1 fuel rail bolts first pass to 12 N.m (106 lb in). Tighten the Bank 1 fuel rail bolts final pass to 23 N.m (17 lb ft).
7. Install a NEW crossover tube. Refer to «Fuel Injection Fuel Rail Crossover Tube Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
8. Install the high pressure fuel sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
9. Connect the fuel injector wiring harness electrical connector to the fuel injectors, fuel rail and fuel pressure sensor.
10. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
11. Install the foam insulator from the fuel rails.
12. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
13. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
14. Install the low side fuel pressure service port cap.
15. Install the fuel tank cap.

EN-49248: Injector Rail Assembly Remover

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 fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
4. Remove the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
5. Remove the cylinder head. Refer to «Cylinder Head Replacement - Left Side (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-2-of-2) .
6. Remove the fuel rail bolts (1).
7. Remove the fuel rail and injectors (1) as an assembly using the EN-49248: remover.
8. Remove and discard the direct fuel injector hold down clamps.
9. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-off-vehicle-2-of-4__fuel-rail-and-injectors-cleaning-and) .

1. Install the fuel rail with injectors (2) into the cylinder head evenly.
2. Hand tighten the two outer fuel rail bolts to seat the injector in the injector bores.
3. Start and hand tighten the remaining fuel rail bolts (1).
4. Tighten the fuel rail bolts in the sequence shown: Tighten the Bank 1 fuel rail bolts first pass to 12 N.m (106 lb in). Tighten the Bank 1 fuel rail bolts a final pass to 23 N.m (17 lb ft).
5. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
6. Connect the fuel injector wiring harness electrical connector from the fuel injectors, fuel rail and fuel pressure sensor.
7. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
8. Install the foam insulator to the fuel rails.
9. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
10. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
11. Install the cylinder head. Refer to «Cylinder Head Replacement - Left Side (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-2-of-2) .
12. Install the low side fuel pressure service port cap.
13. Install the fuel tank cap.

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 fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Remove the high pressure fuel sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
4. Remove the crossover tube. Refer to «Fuel Injection Fuel Rail Crossover Tube Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) . Discard this pipe.
5. Remove the fuel rail bolts (1).
6. Carefully remove the Bank 2 fuel rail (2) from the engine. Lift the rear of the rail to ease removal.
7. Remove and discard the direct fuel injector hold down clamps.
8. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-off-vehicle-2-of-4__fuel-rail-and-injectors-cleaning-and) .

1. Install the rebuilt direct fuel injectors (1) to the cylinder heads. Refer to «Fuel Injector Replacement»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions__fuel-injector-replacement) .
2. Install new direct injector hold down clamps to the injectors.
3. On the new fuel rail, lubricate the fuel injector cups with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__adhesives-fluids-lubricants-and-sealers)
4. Carefully place the fuel rail (2) into position, placing the front into the fuel rail over the front injector and rotating the rear downward.
5. Install the 2 outer fuel rail bolts first, then the 2 inner bolts and hand tighten.
6. Tighten the fuel rail bolts in the sequence shown: Tighten the Bank 1 fuel rail bolts first pass to 12 N.m (106 lb in). Tighten the Bank 1 fuel rail bolts a final pass to 23 N.m (17 lb ft).
7. Install a NEW fuel rail crossover tube. Refer to «Fuel Injection Fuel Rail Crossover Tube Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
8. Install the high pressure fuel sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
9. Connect the fuel injector wiring harness electrical connector (1) from the fuel injectors, fuel rail and fuel pressure sensor.
10. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
11. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
12. Install the low side fuel pressure service port cap.
13. Install the fuel tank cap.

1. Remove the fuel injection sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
2. Remove the high pressure pump shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. 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) .
4. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
5. Loosen the fuel rail crossover pipe (1) fitting to the right fuel rail (2).
6. Loosen the fuel rail crossover pipe (1) fitting to the left fuel rail (3).
7. Remove the fuel rail crossover pipe (1) from the vehicle. Discard the pipe.

1. Ensure that the fuel rail crossover pipe, right fuel rails fittings and left fuel rail fittings are clean and dry prior to assembly.
2. Lubricate the pipes with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
3. Position the fuel rail crossover pipe (1) to the right fuel rails fitting (2) and left fuel rail fitting (3).
4. Tighten the fuel rail crossover pipe fittings. Tighten the fittings first pass to 16 N.m (12 lb ft). Tighten the fittings final pass to 32 N.m (24 lb ft).
5. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
6. Install the low side fuel pressure service port cap.
7. Install the fuel tank cap.
8. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
9. Install the high pressure pump shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
10. Install the fuel injection sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
2. Remove the pressure pump shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. 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) .
4. Remove the foam insulator from the pipes.
5. Loosen the high pressure pipe fitting to the high pressure fuel pump (1).
6. Loosen the high pressure pipe fitting to the left fuel rail (3).
7. Remove the high pressure fuel pipe (2) from the vehicle. Discard the pipe.

1. Lubricate the pipes with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__adhesives-fluids-lubricants-and-sealers) .
2. Position the NEW high pressure fuel pipe (2) to the high pressure fuel pump fitting (1) and left fuel rail (3). hand tighten the fitting.
3. Tighten the high pressure fuel pipe fitting. Tighten the fitting a first pass to 16 N.m (12 lb ft). Tighten the fitting a final pass to 32 N.m (24 lb ft).
4. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
5. Install the low side fuel pressure service port cap.
6. Install the fuel tank cap.
7. Install the high pressure pump shield. Refer to «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
8. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .

Scheme 62

Scheme 63

1. Remove the cross vehicle brace. Refer to «Cross Vehicle Brace Replacement»(/cadillac/cts/ii-2007-2014/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
2. Remove the fuel injection sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2)
3. Remove the intake manifold insulator.
4. Remove the wiper transmission. Refer to «Windshield Wiper Transmission Replacement»(/cadillac/cts/ii-2007-2014/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
5. Remove the fuel pipe shield to intake manifold bolts (1).
6. Remove the fuel pipe shield to cylinder bolt (1).
7. Carefully remove the fuel pipe shield from the vehicle. Take care not to damage the insulation behind the shield.

1. Position the fuel pipe shield behind the high pressure fuel pump. Take care not to damage the insulation behind the shield.
2. Install the fuel pipe shield to cylinder bolt (1). Hand tighten at this time.
3. Install the fuel pipe shield to intake manifold bolts (1). Tighten the fuel pipe shield to manifold bolts to 23 N.m (17 lb ft). Tighten the fuel pipe shield to head bolt to 10 N.m (89 lb in).
4. Instal the wiper transmission. Refer to «Windshield Wiper Transmission Replacement»(/cadillac/cts/ii-2007-2014/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
5. Install the fuel injection sight shield. Refer to «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2)
6. Install the cross vehicle brace. Refer to «Cross Vehicle Brace Replacement»(/cadillac/cts/ii-2007-2014/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .

EN-48896: High Pressure Fuel Pump Installation Alignment Gauge

1. Relieve the low and high side 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 high pressure fuel pump shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
4. Remove the low pressure feed pipe. Refer to «Fuel Feed Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Feed Pipe Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
5. Remove the high pressure pipe. Discard the pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
6. Remove and discard the high pressure fuel pump bolts (1).
7. Remove the high pressure fuel pump (2).
8. Remove and discard the high pressure fuel pump O-ring (3).
9. Remove and discard the high pressure fuel pump gasket (4).
10. Remove the high pressure fuel pump roller lifter (5).

1. Use the EN-48896: alignment gauge to ensure that the camshaft lobe is in the base circle position. At base circle the tool will be flush with the head.
2. Lubricate the high pressure fuel pump cylinder head bore and roller lifter with camshaft prelube. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__adhesives-fluids-lubricants-and-sealers) .
3. Install the high pressure fuel pump roller lifter (5).
4. Install a NEW high pressure fuel pump O-ring (3).
5. Position the NEW high pressure fuel pump gasket (4) and bolts (1) to the fuel pump.
6. Install the high pressure fuel pump (2). Force will be required while hand tightening the bolts.
7. Tighten the high pressure fuel pump retaining bolts to 15 N.m (11 lb ft).
8. Ensure the high pressure fuel pump and fuel rail fittings are clean prior to assembly.
9. Install a NEW high pressure fuel pipe. Refer to «Fuel Feed Intermediate Pipe Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Feed Intermediate Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
10. Install the fuel feed pipe to the high pressure fuel pump. Refer to «Fuel Feed Pipe Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Feed Pipe Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
11. Connect the high pressure fuel pump wiring harness.
12. Install the fuel tank cap.
13. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
14. Install the pressure relief cap to the fuel feed pipe.
15. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
16. Install the high pressure fuel pump shield. Refer to «Fuel Pipe Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Pipe Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

Fuel Injector Replacement

Special Tools

1. EN-47909: Injector Bore and Sleeve Cleaning Kit
2. EN-48266: Injector Seal Installer and Sizer
3. J 2619-01: Slide Hammer
4. J-37281-A: Injector Remover
5. J 39313: Spark Plug Port Adapter

1. Relieve the high side 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 fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
3. Remove and discard the three fuel injector retaining rings (1).
4. Remove the direct fuel injectors and harness (1) as an assembly, and disconnect the electrical connector (2). If necessary, use the J 2619-01: slide hammer with the J-37281-A: injector remover in order to remove the direct fuel injectors evenly.
5. Remove and discard the following components from the fuel injectors (4). Upper O-ring Seal (1) Plastic Spacer (2) Retaining Ring (3) Isolator Cup (5) Teflon Seal (6)
6. Inspect the fuel rail injector bores and clean with the J-39313: adapter, and EN-47909: cleaning kit, if required.

1. Install the following NEW components to the fuel injectors. Use steps 2 through 8 to install these components. Upper O-ring Seal (1) Plastic Spacer (2) Retaining Ring (3) Isolator Cup (5) Teflon Seal (6)
2. From the EN-48266: Installer, position the EN 48266-1 to the injector tip.
3. Install a NEW teflon seal onto the EN 48266-1.
4. Pull the NEW teflon seal by hand over the EN 48266-1 and into the groove in the injector.
5. Remove the EN 48266-1 from the injector tip.
6. From the EN-48266: Installer, install the EN 48266-2 to the injector tip.
7. Using the EN 48266-2, resize the teflon seal. Install the EN 48266-2, until it bottoms out against the injector body, and rotate the EN 48266-2 while applying only moderate force 180 degrees in one direction and then 180 degrees back in the other direction.
8. Remove the EN 48266-2.
9. Install the direct fuel injectors and harness (1) as an assembly and connect the electrical connector (2).
10. Install the fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LLT)»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

Scheme 64

Scheme 65

1. Remove the exhaust system. Refer to «EXHAUST SYSTEM REPLACEMENT (LF1)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) or «EXHAUST SYSTEM REPLACEMENT (LLT)»(/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 66

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 (LF1)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system) or «EXHAUST SYSTEM REPLACEMENT (LLT)»(/cadillac/cts/ii-2007-2014/remont/exhaust/#engine-exhaust-system)

1. Remove 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) .
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-30l-or-36l-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) .

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. 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.

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
2. Disconnect the engine wiring harness electrical connector(s) (1) from the ignition coil(s) (4).
3. Remove the ignition coil bolt(s).
4. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s). Tighten: Tighten the bolt(s) to 10 N.m (89 lb in).
3. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s) (4).
4. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) or «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
2. Disconnect the engine wiring harness electrical connector(s) (5) from the ignition coil(s) (4).
3. Remove the ignition coil bolt(s).
4. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s) and tighten to 10 N.m (89 lb in).
3. Connect the engine wiring harness electrical connector(s) (5) to the ignition coil(s) (4).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) or «Fuel Injector Sight Shield Replacement (LLT)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .

Spark Plug Operation

Worn or dirty spark plugs may operate well at idle speeds, but frequently fail at higher load. Bad spark plugs are often responsible for the following conditions

1. Power loss
2. Poor fuel economy
3. Loss of speed
4. Hard starting
5. Poor engine performance

Normal spark plug operation results in brown to grayish tan deposits on the area of the spark plug that enters the cylinder. A small amount of reddish brown, yellow, and white powdery residue may also be present on the insulator tip around the center electrode. These deposits are normal combustion by-products of fuels and lubricating oils which contain additives.

Misfiring is a general term that applies to a poor running engine. With misfiring, the ignition spark is not igniting the air/fuel mixture at the proper time. While other possible causes must be investigated, the spark plugs should be inspected first. Spark voltage should not reach ground before jumping across the gap at the tip of the spark plug. This leaves the air/fuel mixture unburned, causing misfiring. Pre-ignition misfiring occurs when the spark plug tip overheats, igniting the mixture before the spark jumps.

Carbon fouling of the spark plug is indicated by dry carbon deposits on the portion of the spark plug inside of the cylinder. Excess idling and driving at slower speeds under light engine loads can keep the spark plug temperatures so low that these deposits are not burned off. Rich fuels or poor ignition system output may also cause carbon fouling.

Oil fouling of the spark plug appears as wet oily deposits on the portion of the spark plug inside of the cylinder. This may be caused by the following conditions

1. Oil getting past worn piston rings
2. Breaking in a new or recently overhauled engine

Deposit fouling of the spark plug occurs when the normal reddish brown, yellow, or white deposits of combustion by-products become sufficient enough to cause misfiring. In some cases, these deposits melt and form a shiny glaze on the insulator around the center electrode. If the fouling is found only in one or two of the cylinders, valve stem clearances or the intake valve seals may be allowing excess lubricating oil to enter the cylinder, particularly if the deposits are heavier on the intake valve side of the spark plug.

Excess gap means that the air space between the center and side electrodes at the bottom of the spark plug is too wide for consistent firing. This may be due to improper gap adjustment or to excess wear of the electrodes during use. A gap that is too small may cause idling instability. Excess gap wear might indicate vehicle operation at continual high speeds or with high engine loads. This causes the spark plugs to run too hot. Excessively lean fuel may also cause the wear.

Improper torque or seating can cause a spark plug to run hot, eventually leading to excess gap wear. In extreme cases, an overtightened or under-tightened spark plug can cause exhaust blow-by. The cylinder head seats must make good contact for sufficient heat transfer and spark plug cooling. Dirty or damaged threads in the head or on the spark plug can keep the spark plug from seating even though the proper torque is applied. Once the spark plugs are properly seated, tighten the spark plugs properly.

Cracked or broken insulators and insulator tips may be the result of improper installation or heat shock. Heat shock is a rapid increase in the insulator tip temperature which causes the insulator material to crack. The upper insulators can be broken when a poorly-fitting tool is used during servicing, or when the spark plug is hit from the outside. Cracks in the upper insulator may be inside the shell or invisible. The breakage may not cause problems until oil or water penetrates the crack later. Heat shock breakage in the lower insulator tip generally occurs during severe engine operating conditions such as higher RPM or heavy loading. Over advanced timing or low grade fuels may also cause heat shock breakage. Always replace spark plugs with broken or cracked insulators.

Damage during gapping can occur when the tool is pushed against the center electrode or the surrounding insulator, causing the insulator to crack. When gapping a spark plug, bend only the outside electrode. Keep tools free of any other parts.

Spark plugs with less than the recommended amount of service can sometimes be cleaned and re-gapped, then returned to service. If there is any doubt about the serviceability of a spark plug, replace the spark plug.

1. Turn the ignition OFF.
2. Remove the ignition coil. Refer to «Ignition Coil Replacement - Bank 1»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) and/or «Ignition Coil Replacement - Bank 2»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .
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»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-specifications__ignition-system-specifications) .
2. Install the spark plug and tighten to 20 N.m (15 lb ft).
3. Install the ignition coil. Refer to «Ignition Coil Replacement - Bank 1»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) and/or «Ignition Coil Replacement - Bank 2»(/cadillac/cts/ii-2007-2014/remont/testing-diagnostics/#engine-controls-and-fuel-30l-or-36l-repair-instructions) .

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 crankshaft position (CKP) electrical connector (3).
3. Remove the crankshaft sensor bolt.
4. Remove the crankshaft sensor.

1. Install the crankshaft position sensor.
2. Install the crankshaft position sensor bolt and tighten to 10 N.m (89 lb in).
3. Connect the CKP electrical connector (3).
4. Lower the vehicle.

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#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 and tighten 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»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#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 and tighten 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 «Lower Intake Manifold Replacement (LF1)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .
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 and tighten to 10 N.m (89 lb in).
3. Install the upper intake manifold. Refer to «Lower Intake Manifold Replacement (LP1, LY7)»(/cadillac/cts/ii-2007-2014/remont/mechanical/#engine-mechanical-30l-or-36l-repair-instructions-on-vehicle-1-of-2) .

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Air Cleaner Assembly Replacement (LLT)

Scheme 79

Scheme 80

See also:
• Diagnostic Trouble Code (DTC) List - Vehicle
• Battery Negative Cable Disconnection and Connection (Sedan,Wagon)
• Control Module References
• Clutch Pedal Position Sensor Learn
• Cooling System Draining and Filling (Static Fill LF1, LLT)
• Cooling System Draining and Filling (GE 47716 LF1, LLT)
• Fastener Caution
• Fuel Injector Sight Shield Replacement (LF1)
• Heated Oxygen and Oxygen Sensor Caution
• Adhesives, Fluids, Lubricants, and Sealers
• Lifting and Jacking the Vehicle
• Instrument Panel Insulator Replacement - Left Side (Left Hand Drive)
• Gasoline/Gasoline Vapors Warning
• Special Tools
• Safety Glasses Warning
• Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution
• Relieving Fuel Pressure Warning
• Fuel Pipe Fitting Warning
• Exhaust System Replacement (LF1)
• Rear Propeller Shaft Replacement (RPO LLT/LF1with MX7 or MN6)
• Rear Frame Replacement
• Rear Compartment Side Trim Panel Replacement
• Tire and Wheel Removal and Installation
• Component Fastener Tightening Caution
• Transmission Support Replacement (Automatic CTS-V)
• Transmission Support Replacement (Manual CTS-V)
• Special Tools
• Cylinder Head Replacement - Left Side (LF1)
• Fuel Rail and Injectors Cleaning and Inspection (LF1)
• Cross Vehicle Brace Replacement
• Windshield Wiper Transmission Replacement
• Safety Glasses and Compressed Air Warning
• Ignition System Specifications
• Air Cleaner Resonator Outlet Duct Replacement
• Air Cleaner Outlet Duct Replacement (LLT)
• Fuel Pressure Relief
• Metal Collar Quick Connect Fitting Service
• Fuel Injector Replacement
• Air Cleaner Assembly Replacement (LLT)