LaCrosse V6-3.6L VIN 7 (2006)
Engine Control Module: Service and Repair
ENGINE CONTROL MODULE (ECM) REPLACEMENT
REMOVAL PROCEDURE
NOTE: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.
1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
IMPORTANT: 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.
2. Turn the ignition OFF.
3. Use a DVOM in order to measure the main relay circuit voltage at the engine control module (ECM) fuse in the underhood fuse block.
IMPORTANT: Ensure that there is no main relay circuit voltage (ECM Fuse).
4. Disconnect the battery negative cable.
5. Remove the ECM fuse in the underhood fuse block.
6. Remove the TCM/IPC fuse in the underhood fuse block.
7. Remove the ECM/TCM fuse in the underhood fuse block.
8. Unlock the body side (outboard) ECM electrical connector.
1. Depress the ECM electrical connector lever lock (1).
2. Simultaneously rotate the ECM connector clamp lever and depress the lock slide (2).
9. Remove the body side (outboard) ECM connector.
