GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

Important: Unless otherwise directed by the Diagnostic System Check diagnose all Bxxxx codes prior to diagnosing any Pxxxx codes

B2960

DTC B2960

BCM

B2945

DTC B2945

BCM

B3031

DTC B3031

BCM

B3055

DTC B3055

BCM

P1626

DTC P1626

PCM

P1630

DTC P1630

PCM

P1631

DTC P1631

PCM

Pxxxx

Pxxxx other PCM DTCs. Refer to Diagnostic Trouble Code (DTC) List in Engine Controls - 3.8 L

PCM