GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

U1000

DTC U1000 and U1255

EBCM, BCM, SDM, Radio

U1016

DTC U1001-U1254

BCM, SDM, RCDLR

U1040

DTC U1001-U1254

PCM, BCM

U1064

DTC U1001-U1254

PCM, SDM, Radio, RCDLR

U1088

DTC U1001-U1254

BCM

U1128

DTC U1001-U1254

BCM

U1176

DTC U1001-U1254

BCM

U1255

DTC U1000 and U1255

BCM, PCM, SDM, EBCM, Radio, RCDLR

U1300

DTC U1300, U1301, or U1305

PCM, EBCM, SDM, Radio

U1301

DTC U1300, U1301, or U1305

PCM, EBCM, SDM, Radio

U1305

DTC U1300, U1301, or U1305

BCM, PCM, SDM, EBCM, Radio, RCDLR

U2000-U2007

DTC U2000-U2007 in Body Control System

BCM