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.

006

DTC 006

BCM

B0686

DTC B0686

VTD

B0687

DTC B0687

VTD

B0688

DTC B0688

VTD

B0689

DTC B0689

VTD

B2955

DTC B2955

VTD

B2960

DTC B2960

VTD

P1626

DTC P1626

PCM

P1629

DTC P1629

PCM

Pxxxx

Pxxxx other PCM DTCs

Refer to Diagnostic Trouble Code (DTC) List in Engine Controls - 3.1L (LG8) or Diagnostic Trouble Code (DTC) List in Engine Controls - 3.8L

PCM