GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Attempt to operate the rear compartment lid release and the power door locks.

Are the rear compartment lid release and the power door locks operational?

Go to Step 2

Go to Cannot Enter BCM Diagnostics in Body Control Systems

2

Check for body control module (BCM) DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying in Body Control Systems.

Does the BCM flash any of the following codes:

    • DTC 21/31
    • DTC 22/32

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Step 3

3

Does the BCM flash any other DTCs?

Go to Diagnostic Trouble Code (DTC) List/Type in Body Control System

Go to Symptoms - Lighting Systems