GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

B1000

DTC B1000

Audio Amplifier, BCM, DDM, DSM, DVD-Player, EGM, FPDM, HVAC Control Module, HVAC Control Module-Auxiliary, LGM, IPC, PRM, Radio, SDM, VCIM, VTD

B1004

DTC B1004

VCIM

B1007

DTC B1007

VCIM, VTD

B1009

DTC B1009

VCIM, VTD

B1397

DTC B1397

BCM

B1440

DTC B1440

BCM

C0550

DTC C0550

EBCM, TCSCM