GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

DTC 041

DTC 041

Body Control Module (BCM)

DTC 042

DTC 042

Body Control Module (BCM)

DTC 043

DTC 043

Body Control Module (BCM)

DTC 044

DTC 044

Body Control Module (BCM)

DTC 045

DTC 045

Body Control Module (BCM)