GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Modules

B1000

DTC B1000

SDM, Theft Deterrent Control Module

B1652

DTC B1652

IPC, IPM

B1656

DTC B1656

BCM, DDM, IPC, MSM

B1657

DTC B1657

IPC

B1658

DTC B1658

BCM, IPM, MSM, Theft Deterrent Control Module