GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

B1000

DTC B1000

BCM, DIC, HVAC, IPC, SDM, MSM, VIU

B1004

DTC B1004

VIU

B1007

DTC B1007

VIU

B1009

DTC B1009

VIU