GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

B1327

DTC B1327

Body Control Module (BCM), Onstar (ONS)

B1507

DTC B1507

Body Control Module (BCM)

B1508

DTC B1508

Body Control Module (BCM)

P0560

DTC P0560

Powertrain Control Module (PCM)

P0620

DTC P0620

Powertrain Control Module (PCM)