Removal Procedure

Fig 1: Retrieving Percentage Of Remaining Engine Oil

Courtesy of GENERAL MOTORS CORP.

Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
Slide the lever lock to the up position in order to release the connector.
Disconnect the body harness electrical connector from the engine control module (ECM).

Fig 2: Sliding Lever Locks To Up Position
Courtesy of GENERAL MOTORS CORP.
Slide the lever locks to the up position in order to release the connectors.
Disconnect the engine harness electrical connectors from the ECM.

Fig 3: Removing ECM
Courtesy of GENERAL MOTORS CORP.
Release the retaining tab located in the battery box lower half using a small screwdriver or other suitable tool.
Remove the ECM by lifting upward after releasing the tab.