GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

B1000

DTC B1000

Audio Amplifier, BCM, DDM, FPDM, HVAC, IPC, LGM, MSM-Driver, Radio, RSA, SDM, VCIM, VTD

B1004

DTC B1004

VCIM

B1007

DTC B1007

VCIM

B1009

DTC B1009

VCIM

B1397

DTC B1397

BCM

B1420

DTC B1420

BCM

B1440

DTC B1440

BCM