GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

B1017

DTC B1017 or B3970

DDM/PDM

B1023

DTC B1023

DDM/PDM

B1550

DTC B1550

DDM/PDM

B1720

DTC B1720

DDM/PDM

B1721

DTC B1721

DDM/PDM

B1723

DTC B1723

DDM/PDM

B1724

DTC B1724

DDM/PDM

B3808

DTC B3808

BCM

B3809

DTC B3809

BCM

B3819

DTC B3819

BCM

B3820

DTC B3820

BCM

B3821

DTC B3821

BCM

B3822

DTC B3822

BCM

B3823

DTC B3823

BCM

B3824

DTC B3824

BCM