GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

CXXXX

Diagnostic Trouble Code (DTC) List in Antilock Brake System

EBCM

P1554

DTC P1554

PCM

P1585

DTC P1585

PCM

PXXXX

Diagnostic Trouble Code (DTC) List in Engine Controls-3.4L

PCM