Bonneville V8-4.6L VIN Y (2004)
Engine Control Module: Service and Repair
POWERTRAIN CONTROL MODULE (PCM) REPLACEMENT
REMOVAL PROCEDURE
NOTE: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery
cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.
1. Record the Transaxle Fluid and Engine Oil Life Indexes.
2. Turn OFF the ignition.
3. Disconnect the battery negative cable.
4. Remove the screw retaining the intake air duct/resonator (3) to the powertrain control module (PCM) housing.
5. Unsnap the air filter housing clamps on top of the air cleaner housing assembly.
6. Pull the intake air duct/resonator assembly (2) up enough to remove the air cleaner cover (3) and the PCM.
7. Slide the air cleaner element assembly toward the fender to separate the air cleaner element assembly from the air inlet assembly.
8. Loosen the PCM connector attaching bolts.
9. Disconnect both PCM connectors.
10. Remove the PCM (1).
INSTALLATION PROCEDURE
IMPORTANT: If the PCM is being programmed using the Off- Board method, perform the programming before continuing with the steps listed
