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

B3031

DTC B3031

VTD

B3055

DTC B3055

VTD

B3060

DTC B3060

VTD

B3935

DTC B3935

VTD

P1630

DTC P1630

PCM

P1631

DTC P1631

PCM

Pxxxx

Pxxxx other PCM DTCs

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

PCM