GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

B3127

DTC B3127

Body Control Module

B3132

DTC B3132 or B3133

Body Control Module

B3133

DTC B3132 or B3133

Body Control Module

B3137

DTC B3137 or B3138

Body Control Module

B3138

DTC B3137 or B3138

Body Control Module