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.

B2734

DTC B2734

VTD

B2947

DTC B2947

VTD

B2948

DTC B2948

VTD

B2955

DTC B2955

VTD

B2960

DTC B2960

VTD

B3031

DTC B3031

VTD

B3055

DTC B3055

VTD

P1630

DTC P1630

PCM

P1631

DTC P1631

PCM

Pxxxx

Pxxxx other PCM DTCs

Refer to Diagnostic Trouble Code (DTC) List in Engine Controls - 4.6L

PCM