Engine Controls and Fuel - 3.9l - Repair Instructions Chevrolet Impala IX

Engine Control Module Replacement

Service of the engine control module (ECM) should normally consist of either replacement of the ECM or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures call for ECM replacement, inspect the ECM first to see if the replacement is the correct part. If the ECM is faulty, remove the ECM and install the new service ECM.

The new service ECM will not be programmed. You must program the new ECM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

Removal Procedure

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 5 000 km (3,000 mi) from the last engine oil change.

1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life, if required.
2. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Remove the left front inner fender brace. Refer to «Front Fender Upper Diagonal Brace Replacement»(/chevrolet/impala/ix-2006-2016/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
4. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
5. Disconnect the ECM electrical connectors (2).
6. Remove the ECM from the air cleaner lower housing.

Installation Procedure

1. Install the ECM to the air cleaner lower housing.
2. Connect the ECM electrical connectors (2).
3. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
4. Install the left front inner fender brace. Refer to «Front Fender Upper Diagonal Brace Replacement»(/chevrolet/impala/ix-2006-2016/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
5. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system) .
6. Program the new ECM. Refer to «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

Crankshaft Position System Variation Learn

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 signal activity-If there is a camshaft position 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»(/chevrolet/impala/ix-2006-2016/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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) and perform the appropriate diagnostic procedure.
5. Turn OFF the ignition for 30 s after the learn procedure is completed successfully in order to store the crankshaft position system variation values in the ECM memory.

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.

1. Drain the cooling system. Refer to «Cooling System Draining and Filling (9C1, 9C3 Static Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LZE, LGD Static Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LZE, LGD GE47716 Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) .
2. Remove the intake manifold cover, if necessary. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
4. Remove the ECT sensor.

1. Coat the threads of the ECT sensor with sealer GM P/N 13246004 (Canadian P/N 10953480) or equivalent.
2. Install the ECT sensor and tighten to 20 N.m (15 lb ft).
3. Connect the ECT electrical connector.
4. Install the intake manifold cover, if necessary. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
5. Fill the cooling system. Refer to «Cooling System Draining and Filling (9C1, 9C3 Static Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LZE, LGD Static Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) or «Cooling System Draining and Filling (LZE, LGD GE47716 Fill)»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) .

Scheme 3

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).
3. Remove the spark plug wire clip from the intake manifold bracket, if necessary.
4. Remove the upper intake manifold bolts.
5. Remove the MAP sensor and bracket.
6. Remove the MAP sensor seal from the upper intake manifold.

1. Install the MAP sensor seal into the upper intake manifold.
2. Install the MAP sensor and bracket.
3. Install the upper intake manifold bolts and tighten to 25 N.m (18 lb ft).
4. If required, install the spark plug wire clip to the intake manifold bracket.
5. Connect the MAP sensor electrical connector (1).
6. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Disconnect the engine wiring harness electrical connector from the barometric (BARO) pressure sensor.
3. Remove the BARO sensor bolt.
4. Remove the BARO sensor.

1. Lubricate the BARO sensor O-ring seal with clean engine oil.
2. Install the BARO sensor to the bracket.
3. Install the BARO sensor bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
4. Connect the engine wiring harness electrical connector to the BARO sensor.
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

1. Remove the connector position assurance (CPA) retainer (3).
2. Disconnect the heater oxygen sensor (HO2S) electrical connector (2).
3. Remove the oxygen sensor electrical connector from the ignition coil bracket.
4. Remove the HO2S from the exhaust manifold.

Note. A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. If re-installing the old sensor, coat the threads with anti-seize compound P/N 12377953, or equivalent.
2. Install the HO2S to the exhaust manifold. Tighten: Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S electrical connector (2).
4. Install the CPA retainer (3).
5. Install the oxygen sensor electrical connector to the ignition coil bracket.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the connector position assurance (CPA) retainer (1).
3. Disconnect the heated oxygen sensor (HO2S) electrical connector (3).
4. Remove the HO2S electrical connector clip from the heat shield.
5. Remove the HO2S from the catalytic converter.

Note. A special anti-seize compound is use on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burns away, but the glass beads remain, making the sensor easier to remove. New or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. If re-installing the old sensor, coat the threads with the anti-seize compound P/N 12377953, or equivalent.
2. Install the HO2S to the catalytic converter. Tighten: Tighten the sensor to 42 N.m (31 lb ft).
3. Connect the HO2S electrical connector (3).
4. Install the CPA retainer (1).
5. Install the HO2S electrical connector clip to the heat shield.
6. Lower the vehicle.

1. Remove the left instrument panel (I/P) sound insulator. Refer to «Instrument Panel Insulator Panel Replacement - Left Side»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
2. Disconnect the accelerator pedal position (APP) sensor electrical connector (1).
3. Remove the APP sensor assembly bolts.
4. Remove the APP sensor assembly from the vehicle.

1. Position the APP sensor assembly to the vehicle.
2. Install the APP sensor assembly bolts. Tighten: Tighten the bolts to 5 N.m (44 lb in).
3. Connect APP sensor electrical connector (1).
4. Install the left I/P sound insulator. Refer to «Instrument Panel Insulator Panel Replacement - Left Side»(/chevrolet/impala/ix-2006-2016/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .

Note. DO NOT for any reason, insert a screwdriver or other small hand tool into the throttle body to hold open the throttle plate as a wedge, as the inside of the throttle body could be damaged. An 8-digit part identification number is stamped on the throttle body casting. Refer to this number, if servicing or part replacement is required.

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
3. Disconnect the electronic throttle control (ETC) electrical connector (2).
4. Remove the heater inlet and outlet pipe clip nuts from the throttle body studs.
5. Reposition the heater inlet and outlet hose/pipe.
6. Remove the throttle body bolts/studs.
7. Remove the throttle body.
8. Remove and discard the throttle body gasket.

Note. DO NOT reuse the throttle body gasket. Install a NEW gasket during assembly.

1. Install a NEW throttle body gasket. Align the locating tab of the gasket with the notch in the manifold.
2. Position the throttle body to the intake manifold.
3. Install the throttle body bolts and tighten to 10 N.m (89 lb in).
4. Position the heater inlet and outlet hose/pipe.
5. Position the heater inlet and outlet hose clamps at the engine pipes.
6. Install the heater inlet and outlet pipe clip nuts to the throttle body studs and tighten to 10 N.m (89 lb in).
7. Connect the ETC electrical connector (2).
8. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
9. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
10. Connect a scan tool in order to test for proper throttle opening and throttle closing ranges.
11. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between closed throttle, and wide open throttle (WOT).
12. Verify that the vehicle meets the following conditions: The vehicle is not in a reduced engine power mode. The ignition is ON. The engine is OFF.
13. Perform the Throttle Learn Procedure. Refer to «Throttle/Idle Learn»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .

Throttle Body Inspection and Cleaning

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) . WARNING: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury. CAUTION: Do not insert any tools into the throttle body bore in order to avoid damage to the throttle valve plate.
2. Inspect the throttle body bore and the throttle plate for deposits. You will need to open the throttle plate in order to inspect all surfaces. CAUTION: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
3. Clean the throttle body bore and the throttle plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or ACDelco Carburetor Tune-Up Conditioner, P/N X66-P, or an equivalent product.
4. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
5. Perform the throttle/idle learn procedure. Refer to «Throttle/Idle Learn»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .

Fuel Pressure Relief (Without CH 48027)

1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to «Electrical Center Identification Views»(/chevrolet/impala/ix-2006-2016/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
2. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
3. Remove the engine cover, if required.
4. Remove the fuel rail service port cap.
5. Wrap a shop towel around the fuel rail service port and using a small flat-bladed tool, depress (open) the fuel rail test port valve.
6. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
7. Install the fuel rail service port cap.
8. Install the engine cover, if required.
9. Tighten the fuel fill cap.

Special Tools

CH-48027 Digital Pressure Gauge

1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to «Electrical Center Identification Views»(/chevrolet/impala/ix-2006-2016/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
2. Remove the engine cover, if required.
3. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
4. Remove the fuel rail service port cap.
5. Wrap a shop towel around the fuel rail service port.
6. Connect the CH-48027-3 (4) to the fuel rail service port.
7. Connect the CH-48027-2 (2) to the CH-48027-3 (4).
8. Place the hose on the CH-48027-2 (2) into an approved gasoline container.
9. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail.
10. Close the valve on the CH-48027-2 (2).
11. Remove the hose on the CH-48027-2 (2) from the approved gasoline container.
12. Disconnect the CH-48027-2 (2) from the CH-48027-3 (4).
13. Disconnect the CH-48027-3 (4) from the fuel rail service port.
14. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
15. Install the fuel rail service port cap.
16. Install the engine cover, if required.
17. Tighten the fuel fill cap.

CH-48027 Digital Pressure Gauge

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Connect the CH-48027-1 (1) to the CH-48027-2 (2).
3. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
4. Perform any tests and/or diagnostics as needed. For the proper usage of the CH-48027 , refer to the manufacture's directions.

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

J 37088-A Fuel Line Disconnect Tool Set

1. Relieve the fuel system pressure. Refer to the «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Remove the retainer from the fuel feed quick-connect fitting.
3. Using compressed air, blow any dirt or debris from around the fitting.
4. Using the correct tool from the J 37088-A , insert the tool into the female connector, then push inward in order to release the quick connect locking tabs.
5. Pull the fuel line connection apart.
6. Use a clean shop towel in order to wipe off the male pipe end.
7. Inspect both ends of the fitting for dirt and burrs. 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 fitting together in order to snap the retaining tabs into place.
3. Once installed, pull on both sides of the fitting in order to make sure the connection is secure.
4. Install the retainer to the fuel feed quick-connect fitting.

1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Using compressed air, blow any dirt out of the quick-connect fitting.
3. This step applies to Bartholomew style connectors ONLY. Squeeze the plastic quick-connect fitting release tabs.
4. This step applies to Q Release style connectors ONLY. Release the fitting by Pushing the tab toward the other side of the slot in the fitting.
5. This step applies to Squeeze to Release style connectors ONLY. Squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
6. This step applies to Squeeze to Release style connectors ONLY. Push in the male side slightly in order to slide the retainer away from the retainers, squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
7. This step applies to Sliding Retainer style connectors ONLY. Release the fitting by pressing on one side of the release tab causing it to push in slightly. If the tab doesn't move try pressing the tab in from the opposite side. The tab will only move in one direction.
8. This step applies to the Global Connector style only. Push the connector toward the tube in order to release the pressure. Press and hold down the release mechanism, and pull the connector straight out.
9. This step applies to the TI Loc style only. Push the connector toward the tube in order to release the pressure. Release the redundant latch (1) with two fingers or a flat bladed tool. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
10. This step applies to the Safe Lock style only. Push the connector toward the tube in order to release the pressure. Release the second latch (1) with two fingers. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
11. Using a clean shop towel, wipe off the male pipe end.
12. Inspect both ends of the fitting for dirt and burrs.
13. Clean or replace components as necessary.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the quick-connect fitting together in order to cause the retaining feature to snap into place.
3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
4. Insert the tube in the connector until the retainer snaps in place.
5. Push down on the redundant latch (1) until it is fully engaged and snapped into position.
6. Insert the tube in the connector until the retainer snaps in place.
7. Push down on the second latch (1) in order to secure the connection.
8. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

1. J 36850 Transjel Lubricant
2. J 42960-2 Fuel Flapper Door Holder
3. J 45004 Fuel Tank Drain Hose

1. Remove the fuel fill cap.
2. Install the J 42960-2 into the fuel fill pipe in order to hold the door open.
3. Insert the J 45004 into the fuel tank until the hose reaches the bottom of the fuel tank.
4. Use an hand or air operated pump device in order to drain as much fuel through the fuel fill pipe as possible.

Note. Clean the fuel and evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the lines in order to avoid possible system contamination.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Drain the fuel tank. Refer to «Fuel Tank Draining (Non E-85)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
4. Loosen the fuel fill hose clamp (1) at the fuel tank.
5. Remove the fuel tank fill hose (2) from the fuel tank (3).
6. Disconnect the EVAP vent pipe quick connect fitting from the fill pipe EVAP vent pipe quick connect fitting. «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
7. Disconnect the EVAP vent solenoid hose on the tank from the vent valve solenoid hose.
8. Disconnect the fuel feed (3), and the EVAP (4) lines from the fuel tank lines (1, 2). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
9. Support the exhaust system.
10. Remove the rubber exhaust pipe hangers in order to allow the exhaust system to drop slightly.
11. Remove the fuel tank shield retainers (3).
12. Remove the fuel tank shield (2).
13. Support the fuel tank with a suitable adjustable jack.
14. Remove the fuel tank strap bolts (3).
15. Using the jack lower the fuel tank.
16. Disconnect the fuel sender jumper harness electrical connector.
17. Remove the fuel tank and place the tank in a suitable work area.
18. Disconnect and remove the fuel pressure sensor and fuel sender jumper harness electrical connectors.
19. Disconnect and remove the fuel feed line (2), and the EVAP lines (1, 3). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
20. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
21. Remove the insulator pads from the fuel tank. Note the location of the insulator pads for installation.

1. Install the insulator pads to the fuel tank.
2. Install the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
3. Install and connect the fuel feed line (2), and the EVAP lines (1, 3). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Install and connect the fuel pressure sensor and fuel sender jumper harness electrical connectors.
5. Install the fuel tank onto a suitable jack.
6. Partially raise the fuel tank until the electrical connection can be made.
7. Connect the fuel sender jumper harness electrical connector.
8. Completely raise the tank.
9. Install the fuel tank strap bolts (3). Tighten: Tighten the bolts to 48 N.m (35 lb ft).
10. Remove the jack from the fuel tank.
11. Position the fuel tank shield (2) to the fuel tank.
12. Install the shield retainers (3).
13. Install the rubber exhaust pipe hangers.
14. Remove the support from the exhaust system.
15. Connect the fuel feed (3), and EVAP (4) lines to the fuel tank lines (1, 2). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
16. Connect the EVAP vent solenoid hose on the tank to the EVAP vent valve solenoid hose.
17. Connect the EVAP vent pipe quick connect fitting to the fill pipe EVAP vent pipe quick connect fitting. «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
18. Install the fuel tank fill hose (2) onto the fuel tank (3). Install the hose over the orientation feature (4) on the tank until fully seated to the tank.
19. Tighten the fuel fill hose clamp (1) at the fuel tank. Tighten: Tighten the clamp to 2.5 N.m (22 lb in).
20. Lower the vehicle.
21. Add fuel and install the fuel fill cap.
22. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system) .
23. Inspect the fuel system for leaks by performing the following steps: Turn ON the ignition for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition. Inspect for fuel leaks.
24. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

Scheme 4

Note. Clean the fuel and evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the lines in order to avoid possible system contamination.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Remove the fuel fill pipe screws from the fuel filler pocket.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
4. Remove the fill pipe bracket bolt (4) from the underbody rail.
5. Remove the EVAP line (2) from the bracket (3).
6. Loosen the fuel fill pipe clamp (1) at the fuel tank.
7. Remove the fuel fill pipe hose (2) from the fuel tank (3).
8. Disconnect the vent pipe quick connect fitting from the fuel tank vent pipe quick connect fitting. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
9. Remove the fuel tank fill pipe.

1. Install the fuel tank fill pipe.
2. Install the fuel tank fill pipe hose (2) onto the fuel tank (3).
3. Connect the vent pipe quick connect fitting to the fuel tank vent pipe quick connect fitting. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Tighten the fuel fill pipe clamp (1) at the fuel tank. Tighten: Tighten the clamp to 2.5 N.m (22 lb in).
5. Install the EVAP line (2) to the bracket (3).
6. Install the fill pipe bracket bolt (4) to the underbody rail. Tighten: Tighten the bolt to 13 N.m (115 lb in).
7. Lower the vehicle.
8. Install the fuel fill pipe screws to the fuel filler pocket. Tighten: Tighten the screws to 2.5 N.m (22 lb in).
9. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

J 45722 Fuel Sender Lock Ring Wrench

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Disconnect the evaporative emission (EVAP) lines from the sender. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
3. Disconnect the fuel line from the sender. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
4. Reposition the fuel feed and EVAP lines in order to access the lock ring.
5. Use the J 45722 and a long breaker-bar in order to unlock the fuel sender lock ring. Turn the fuel sender lock ring in a counterclockwise direction.
6. Remove the fuel sender (2) from the fuel tank.
7. Remove and discard the fuel sender O-ring seal.
8. Clean and inspect the fuel sender assembly O-ring seal sealing surfaces.
9. Place the lock ring on a flat surface. Measure the clearance between to lock ring and the flat surface using a feeler gauge at 7 points.
10. If the warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
11. If the warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

1. Position the NEW fuel sender O-ring seal onto the fuel tank.
2. Install the fuel sender (2) into the fuel tank. Ensure that the align tab is in the proper location.
3. Push down the fuel sender and position the lock ring (1) onto the fuel tank.
4. Use the J 45722 in order to install the fuel sender lock ring. Turn the fuel sender lock ring in a clockwise direction.
5. Connect the fuel line to the sender. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
6. Connect the EVAP lines to the sender. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
7. Install the fuel tank. Refer to «Fuel Tank Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

1. Remove the fuel tank module. Refer to «Fuel Tank Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Using two flat-bladed tools, carefully pull both locking tabs (1) outward while simultaneously lifting the level sensor.
3. Using a small bladed tool, push in the electrical terminals (1) while simultaneously pulling out.

1. Push in the electrical terminals (1) and ensure the terminals are secure.
2. Carefully insert the level sensor until the locking tabs (1) snap into the locking position.
3. Install the fuel tank module. Refer to «Fuel Tank Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

Note. Clean the fuel connection and surrounding areas prior to disconnecting the lines in order to avoid possible system contamination.

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Remove the brake master cylinder and reposition. Refer to «Master Cylinder Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical-hydraulic/#hydraulic-brake-system) .
3. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief (Without CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions__fuel-pressure-relief-without-ch-48027) or «Fuel Pressure Relief (CH 48027)»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Disconnect the fuel feed line (1) from the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
5. Open the fuel/brake pipe retainers (1).
6. Remove the fuel feed line from the fuel/brake pipe retainers (1).
7. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
8. Remove the fuel/brake line retainer bolt.
9. Remove the fuel feed line from the retainer.
10. Remove the fuel/brake line push in retainer from the underbody.
11. Remove the fuel feed line from the retainer.
12. Remove the fuel/brake line retainer bolts.
13. Remove the fuel feed line from the retainer.
14. Open the fuel/brake line retainer (1).
15. Remove the fuel feed line from the retainer.
16. Disconnect the fuel feed (3) and evaporative emission (EVAP) (4) lines from the fuel tank lines (1, 2). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
17. Remove the fuel feed line.

1. Position the fuel feed line.
2. Connect the fuel feed (3) and EVAP (4) lines to the fuel tank lines (1, 2). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
3. Install the fuel feed line to the retainer.
4. Close the fuel/brake line retainer (1).
5. Install the fuel feed line to the retainer.
6. Install the fuel/brake line retainer bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in).
7. Install the fuel feed line to the retainer.
8. Install the fuel/brake line push in retainer to the underbody.
9. Install the fuel feed line to the retainer.
10. Install the fuel/brake line retainer bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
11. Lower the vehicle.
12. Install the fuel feed line to the fuel/brake pipe retainers (1).
13. Close the fuel/brake pipe retainers (1).
14. Connect the fuel feed line (1) to the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
15. Position and install the brake master cylinder. Refer to «Master Cylinder Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical-hydraulic/#hydraulic-brake-system) .
16. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
17. Install the fuel fill cap.
18. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system) .
19. Perform the following steps to inspect for leaks: Turn ON the ignition for 2 seconds. turn OFF the ignition for 10 seconds. Turn ON the ignition. Inspect the system for leaks.
20. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

Fuel System Cleaning

Note. When flushing the fuel tank, treat the fuel and water mixture as a hazardous material. Handle the material in accordance with all local, state and federal laws and regulations. Whenever the fuel tank is cleaned, inspect the fuel pump fuel strainer. If the fuel pump fuel strainer is contaminated, replace the fuel pump fuel strainer and inspect the fuel pump. Always maintain cleanliness when servicing fuel system components.

1. Remove the fuel tank module. Refer to «Fuel Tank Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Inspect the fuel pump inlet for dirt and debris. If dirt and debris are found, replace the fuel pump.
3. Flush fuel tank with hot water.
4. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to ensure that the removal of the water from the fuel tank is complete.
5. Allow tank to dry completely before reassembly.
6. Install the fuel tank module. Refer to «Fuel Tank Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

An 8-digit identification number is stamped on the fuel rail. Refer to this number if servicing or part replacement is required.

Note. If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

1. Disconnect the fuel feed pipe from the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Disconnect any remaining electrical connectors.
3. Remove the upper intake manifold. Refer to «Upper Intake Manifold Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
4. Remove the fuel injector harness connector bracket bolt from the intake manifold.
5. Disconnect the camshaft position (CMP) sensor electrical connector.
6. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
7. Remove the fuel rail bolts.
8. Remove the fuel rail.
9. Remove the O-ring from the spray tip end of each injector.
10. Discard the O-rings if damaged.
11. Remove the fuel injector retaining clip (1), if required.
12. Remove the fuel injector (3) from the fuel rail, if required.
13. Remove the fuel injector upper O-ring (2), if required.

1. The fuel injector (1) is stamped with a part number identification (2).
2. Lubricate the NEW injector O-rings (2) with clean engine oil, if required.
3. Install the fuel injector upper O-ring (2), if required.
4. Install the fuel injector (3) to the fuel rail, if required.
5. Install the fuel injector retaining clip (1), if required.
6. Replace any damaged lower injector O-rings that were removed.
7. Lubricate the lower injector O-rings with clean engine oil.
8. Install the fuel rail assembly into the intake manifold. Tilt the fuel rail assembly slightly to install the injectors.
9. Install the fuel rail bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in).
10. Connect the CMP sensor electrical connector.
11. Disconnect the ECT sensor electrical connector.
12. Position the fuel injector harness connector bracket to the intake manifold.
13. Install the fuel injector harness connector bracket bolt. Tighten: Tighten the bolt to 8 N.m (71 lb in).
14. Install the upper intake manifold. Refer to «Upper Intake Manifold Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
15. Connect any remaining electrical connectors.
16. Connect the fuel feed pipe to the fuel rail. Refer to «Metal Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
17. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system) .
18. Inspect for fuel leaks with the following procedure: Turn ON the ignition for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition. Inspect for fuel leaks.

Note. If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

1. Remove the fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Remove the fuel injector retaining clip (1).
3. Remove the fuel injector (3) from the fuel rail.
4. Remove the fuel injector upper O-ring (2).
5. Remove the fuel injector lower O-ring (4).

1. The fuel injector assembly (1) is stamped with a part number identification (2).
2. Lubricate the new injector O-rings (2, 4) with clean engine oil.
3. Install the fuel injector upper O-ring (2).
4. Install the fuel injector lower O-ring (4).
5. Install the fuel injector (3) to the fuel rail.
6. Install the fuel injector retaining clip (1).
7. Install the fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Disconnect the evaporative emission (EVAP) canister purge solenoid electrical connector (1).
3. Disconnect the chassis EVAP pipe from the EVAP canister purge solenoid. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Remove the EVAP canister purge valve bolt.
5. Remove the EVAP canister purge valve.

1. Remove the EVAP canister purge valve.
2. Remove the EVAP canister purge valve bolt. Tighten: Tighten the bolt to 16 N.m (12 lb ft).
3. Connect the chassis EVAP pipe to the EVAP canister purge solenoid. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Connect the EVAP canister purge solenoid electrical connector (1).
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

Note. Clean the evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the line in order the avoid possible system contamination.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the EVAP canister vent solenoid valve electrical connector.
3. Disconnect the EVAP canister vent solenoid valve from the EVAP emission canister hose.
4. Remove the EVAP canister vent solenoid valve bracket bolt.
5. Remove the EVAP canister vent solenoid valve.

1. Install the EVAP canister vent solenoid valve.
2. Install the EVAP canister vent solenoid valve bracket bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
3. Connect the EVAP canister vent solenoid valve to the EVAP emission canister hose.
4. Connect the EVAP canister vent solenoid valve electrical connector.
5. Lower the vehicle.

Note. Clean the evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the line in order the avoid possible system contamination.

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Remove the brake master cylinder and reposition. Refer to «Master Cylinder Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical-hydraulic/#hydraulic-brake-system) .
3. Disconnect the EVAP (2) line from the purge solenoid. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Open the fuel/brake pipe retainers (1).
5. Remove the EVAP line from the fuel/brake pipe retainers (1).
6. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
7. Remove the fuel/brake line retainer bolt.
8. Remove the EVAP line from the retainer.
9. Remove the fuel/brake line push in retainer from the underbody.
10. Remove the EVAP line from the retainer.
11. Remove the fuel/brake line retainer bolts.
12. Remove the EVAP line from the retainer.
13. Open the fuel/brake line retainer (1).
14. Remove the EVAP line from the retainer.
15. Disconnect the EVAP (4) line from the fuel tank EVAP line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
16. Remove the EVAP line.

1. Position the EVAP line.
2. Connect the EVAP (4) line to the fuel tank EVAP line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
3. Install the EVAP line to the retainer.
4. Close the fuel/brake line retainer (1).
5. Install the EVAP line to the retainer.
6. Install the fuel/brake line retainer bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in).
7. Install the EVAP line to the retainer.
8. Install the fuel/brake line push in retainer to the underbody.
9. Install the EVAP line to the retainer.
10. Install the fuel/brake line retainer bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
11. Lower the vehicle.
12. Install the EVAP line to the fuel/brake pipe retainers (1).
13. Close the fuel/brake pipe retainers (1).
14. Connect the EVAP (2) line to the purge solenoid. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
15. Position and install the brake master cylinder. Refer to «Master Cylinder Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical-hydraulic/#hydraulic-brake-system) .
16. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Disconnect the evaporative emission (EVAP) line (3) from the canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
3. Reposition the EVAP canister hose clamp.
4. Remove the EVAP canister hose.
5. Disconnect the canister EVAP line from the fuel sender. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
6. Squeeze the small retainer in front of the canister in order to disengage the canister.
7. Remove the EVAP canister.

1. Install the EVAP canister.
2. Squeeze the small retainer in front of the canister in order to engage the canister.
3. Connect the canister EVAP line to the fuel sender. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
4. Install the EVAP canister hose.
5. Position the EVAP canister hose clamp.
6. Connect the EVAP line (3) to the canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
7. Install the fuel tank. Refer to «Fuel Tank Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

Tools Required

J 41413-200 EVAP Pressure/Purge Diagnostic Station

Inspection Procedure

1. Turn OFF the ignition.
2. Remove the EVAP canister purge solenoid. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
3. Lightly tap the EVAP canister purge valve on a clean hard surface.
4. Inspect for carbon particles exiting either of the vacuum ports. If no carbon particles are found reinstall the EVAP canister purge solenoid and continue with the EVAP cleaning procedure. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) . If carbon particles are found during the inspection procedure, replace the EVAP canister purge solenoid and continue with the EVAP cleaning procedure. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) . If you were instructed to replace the EVAP canister purge solenoid, and no carbon particles are found, return to the EVAP diagnostic procedure. Do not perform the EVAP cleaning procedure.

EVAP Cleaning Procedure

1. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Turn OFF the main valve on J 41413-200 .
3. Disconnect the hose from the diagnostic station pressure regulator.
4. Using a section of vacuum hose, connect one end to the diagnostic station pressure regulator.
5. Connect the other end of the vacuum hose to the canister side of the purge pipe.
6. Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
7. If the nitrogen does not dislodge the carbon particles, replace the purge pipe.
8. Return the EVAP pressure/purge diagnostic station to the stations original condition.
9. Install a new EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
10. Connect all previously disconnected EVAP pipe connectors.
11. Lower the vehicle.
12. Continue with the published service manual diagnostic DTC procedure.

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Disconnect the manifold absolute pressure (MAP) sensor electrical connector (1).
3. Disconnect the ignition coil electrical connector (6).
4. Disconnect the left side spark plug wires from the ignition coil.
5. Disconnect the right side spark plug wires from the ignition coil.
6. Remove the ignition coil bolts/nuts.
7. Remove the ignition coil.
8. Remove the ignition coil studs, if necessary.

1. Install the ignition coil studs, if necessary. Tighten: Tighten the studs to 25 N.m (15 lb ft).
2. Install the ignition coil bolts/nuts. Tighten: Tighten the bolts/nuts to 25 N.m (15 lb ft).
3. Connect the right side spark plug wires to the ignition coil.
4. Connect the left side spark plug wires to the ignition coil.
5. Connect the ignition coil electrical connector (6).
6. Connect the MAP sensor electrical connector (1).
7. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

Spark Plug Wire Inspection

Spark plug wire integrity is vital for proper engine operation. A thorough inspection will be necessary to accurately identify conditions that may affect engine operation. Refer to the list below for items to be inspected.

1. Inspect for correct routing of the spark plug wires. Improper routing may cause cross-firing. Refer to «Spark Plug Wire Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Inspect each wire for any signs of cracks or splits in the wire.
3. Inspect each boot for the following conditions: Tearing Piercing Arcing Carbon Tracking Corroded terminal

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

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Disconnect the left side spark plug wires from the spark plugs.
3. Disconnect the left side spark plug wires from the ignition coil.
4. If replacing only one plug wire, open the retaining clips and remove the spark plug wire.
5. Remove the left side spark plug wire clips from the intake manifold bracket and heater inlet and outlet pipe.
6. Remove the spark plug wire assembly.
7. Disconnect the right side spark plug wires from the right side spark plugs.
8. Disconnect the left side spark plug wires from the ignition coil.
9. If replacing only one plug wire, open the retaining clips and remove the spark plug wire.
10. Remove the right side spark plug wire clip from the ignition coil bracket.
11. Remove the spark plug wire assembly.

1. Install the spark plug wire assembly.
2. Install the right side spark plug wire clip at the ignition coil bracket.
3. If only one plug wire was replaced, install the plug wire and close the retaining clip.
4. Connect the right side spark plug wires to the ignition coil.
5. Connect the right side spark plug wires to the right side spark plugs.
6. Install the spark plug wire assembly.
7. Install the left side spark plug wire clips at the intake manifold bracket and heater inlet and outlet pipe.
8. If only one plug wire was replaced, install the plug wire and close the retaining clips.
9. Connect the left side spark plug wires to the ignition coil.
10. Connect the left side spark plug wires to the spark plugs.
11. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

Spark Plug Usage

1. Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to «Ignition System Specifications»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-specifications__ignition-system-specifications) for the correct spark plug.
2. Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions: Spark plug fouling-Colder plug Pre-ignition causing spark plug and/or engine damage-Hotter plug

Spark Plug Inspection

1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
2. Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
4. Inspect for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. Refer to «Ignition System Specifications»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-specifications__ignition-system-specifications) . An excessively wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Refer to «Ignition System Specifications»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-specifications__ignition-system-specifications) . Insufficient torque can prevent correct spark plug operation. An over torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug. A rattling sound indicates internal damage. A loose center electrode (4) reduces the spark intensity. Inspect for bridged electrodes (3, 4). Deposits on the electrodes (3, 4) reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4) If equipped. Inspect for excessive fouling.
5. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

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

1. Remove the air cleaner outlet duct, if required. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Remove the intake manifold cover, if required. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
3. Remove the left side spark plug wires from the spark plugs, if required.
4. Remove the right side spark plug wires from the spark plugs, if required.
5. Remove the spark plugs.

1. Gap the NEW spark plugs. Refer to «Ignition System Specifications»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-specifications__ignition-system-specifications) .
2. Install the spark plugs. Tighten: Tighten the plugs to 15 N.m (11 lb ft).
3. Install the right side spark plug wires to the spark plugs, if required.
4. Install the left side spark plug wires to the spark plugs, if required.
5. Install the intake manifold cover, if required. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
6. Install the air cleaner outlet duct, if required. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

1. Remove the power steering pump. Refer to «Power Steering Pump Replacement (LZ4/LZE/LZ9)»(/chevrolet/impala/ix-2006-2016/remont/manual-power-steering/#power-steering-system) .
2. Disconnect the camshaft position (CMP) sensor electrical connector.
3. Remove the CMP sensor bolt.
4. Remove the CMP sensor.
5. Inspect the sensor O-ring for wear, cracks, or leakage if the sensor is not being replaced.

1. Replace the O-ring if damaged, lubricate the NEW O-ring with clean engine oil.
2. Install the CMP sensor.
3. Install the CMP sensor bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
4. Connect the CMP sensor electrical connector.
5. Install the power steering pump. Refer to «Power Steering Pump Replacement (LZ4/LZE/LZ9)»(/chevrolet/impala/ix-2006-2016/remont/manual-power-steering/#power-steering-system) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the crankshaft position (CKP) sensor electrical connector (4).
3. Remove the CKP sensor stud.
4. Remove the CKP sensor.

1. Lubricate the CKP sensor O-ring with clean engine oil.
2. Install the CKP sensor.
3. Install the CKP sensor stud and tighten to 10 N.m (89 lb in).
4. Connect the CKP sensor electrical connector (4).
5. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the catalytic converter. Refer to «Catalytic Converter Replacement (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/exhaust/#engine-exhaust-system) .
3. Disconnect the knock sensor electrical connector (1).
4. Loosen and remove the knock sensor (1).

Note. DO NOT apply thread sealant to the sensor threads. The sensor threads are coated at the factory. Applying additional sealant affects the sensors ability to detect detonation.

1. Install and tighten the knock sensor (1). Tighten: Tighten the sensor to 25 N.m (18 lb ft).
2. Connect the knock sensor electrical connector (1).
3. Install the catalytic converter. Refer to «Catalytic Converter Replacement (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/remont/exhaust/#engine-exhaust-system) .
4. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the radiator air lower baffle and deflector. Refer to «Radiator Air Lower Baffle and Deflector Replacement»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disconnect the knock sensor electrical connector (2).
4. Loosen and remove the knock sensor (2).

1. Install and tighten the knock sensor (2). Tighten: Tighten the sensor to 25 N.m (18 lb ft).
2. Connect the knock sensor electrical connector (2).
3. Install the radiator air lower baffle and deflector. Refer to «Radiator Air Lower Baffle and Deflector Replacement»(/chevrolet/impala/ix-2006-2016/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Lower the vehicle.

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .
2. Release the spring clamps on top of the air cleaner housing.
3. Remove the air cleaner housing cover.
4. Remove the air filter element.

1. Install a NEW air filter element.
2. Install the air cleaner housing cover.
3. Engage the spring clamps on top of the air cleaner housing.
4. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-39l-repair-instructions) .

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .
2. Remove the left inner fender brace. Refer to «Front Fender Upper Diagonal Brace Replacement»(/chevrolet/impala/ix-2006-2016/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
3. Loosen the air cleaner outlet duct clamp at the throttle body.
4. Remove the air cleaner outlet duct from the throttle body.
5. Disconnect the positive crankcase ventilation (PCV) tube from the air inlet duct. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
6. Disconnect the mass air flow (MAF) sensor electrical connector.
7. Remove the upper air cleaner housing from the lower housing. Disengage the tabs on the upper housing from the slots on the lower housing.
8. Without disconnecting the powertrain control module (PCM) connectors, remove the PCM and the harness from the lower air cleaner housing.
9. Without disconnecting the transmission control module (TCM) connectors, remove the TCM and the harness from the lower air cleaner housing.
10. Loosen the air cleaner outlet duct clamp at the air cleaner assembly.
11. Remove the air cleaner outlet duct from the air cleaner.
12. Remove the lower air cleaner housing by pulling the housing from the 2 rubber grommets on the inner rail.
13. Inspect the air cleaner housing assembly for signs of damage and replace if necessary.

1. Install the lower air cleaner housing by pushing the housing down, into the 2 rubber grommets on the inner rail.
2. Install the TCM and the harness to the lower air cleaner housing.
3. Install the PCM and the harness to the lower air cleaner housing.
4. Install the air cleaner outlet duct to the air cleaner assembly.
5. Tighten the air cleaner outlet duct clamp at the air cleaner assembly. Tighten: Tighten the clamp to 3 N.m (27 lb in).
6. Install the upper air cleaner housing to the lower housing. Engage the tabs on the upper housing to the slots on the lower housing.
7. Connect the MAF sensor electrical connector.
8. Connect the PCV tube to the air inlet duct. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
9. Install the air cleaner outlet duct to the throttle body.
10. Tighten the air cleaner outlet duct clamp at the throttle body. Tighten: Tighten the clamp to 3 N.m (27 lb in).
11. Install the left inner fender brace. Refer to «Front Fender Upper Diagonal Brace Replacement»(/chevrolet/impala/ix-2006-2016/remont/exterior-body-panels/#bolted-exterior-body-panels-and-closures) .
12. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/chevrolet/impala/ix-2006-2016/remont/mechanical/#engine-mechanical-39l-repair-instructions-on-vehicle) .

1. Disconnect the positive crankcase ventilation (PCV) tube from the air inlet duct. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .
2. Loosen the air inlet duct clamp at the throttle body.
3. Remove the air inlet duct from the throttle body.
4. Loosen the air inlet duct clamp at the mass air flow (MAF)/intake air temperature (IAT) sensor.
5. Remove the air inlet duct from the MAF/IAT sensor.

1. Install the air inlet duct from the MAF/IAT sensor.
2. Tighten the air inlet duct clamp at the MAF/IAT sensor. Tighten: Tighten the clamp to 3 N.m (27 lb in).
3. Install the air inlet duct to the throttle body.
4. Tighten the air inlet duct clamp at the throttle body. Tighten: Tighten the clamp to 3 N.m (27 lb in).
5. Connect the PCV tube to the air inlet duct. Refer to «Plastic Collar Quick Connect Fitting Service»(/chevrolet/impala/ix-2006-2016/remont/testing-diagnostics/#engine-controls-and-fuel-35l-repair-instructions) .

See also:
• Battery Negative Cable Disconnection and Connection (LGD/LZE)
• Front Fender Upper Diagonal Brace Replacement
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• Cooling System Draining and Filling (9C1, 9C3 Static Fill)
• Intake Manifold Cover Replacement
• Fastener Caution
• Heated Oxygen and Oxygen Sensor Caution
• Lifting and Jacking the Vehicle
• Instrument Panel Insulator Panel Replacement - Left Side
• Throttle/Idle Learn
• Gasoline/Gasoline Vapors Warning
• Relieving Fuel Pressure Warning
• Electrical Center Identification Views
• Fuel Pressure Relief (Without CH 48027)
• Fuel Pipe Fitting Warning
• Safety Glasses and Compressed Air Warning
• Master Cylinder Replacement
• Cover and Plug Openings Caution
• Ignition System Specifications
• Power Steering Pump Replacement (LZ4/LZE/LZ9)
• Catalytic Converter Replacement (LGD/LZE)
• Air Cleaner Assembly Replacement