GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Modules

U1000

DTC U1000 and U1255

CVRSS

U1016

DTC U1001-U1254

BCM, CVRSS, EBCM, HVAC Control Processor, IPC, MMM, MSM, RCDLR, VIU

U1040

DTC U1001-U1254

CVRSS, IPC

U1056

DTC U1001-U1254

EBCM

U1064

DTC U1001-U1254

CVRSS, EBCM, HVAC Control Module, HVAC Control Processor, IPC, MMM, MSM, PCM, Radio, RCDLR, SDM, VIU

U1088

DTC U1001-U1254

BCM, IPC

U1096

DTC U1001-U1254

BCM, HVAC Control Module, HVAC Control Processor, PCM, Radio, SDM

U1128

DTC U1001-U1254

VIU

U1151

DTC U1001-U1254

Radio

U1152

DTC U1001-U1254

CVRSS, HVAC Control Module, PCM

U1153

DTC U1001-U1254

BCM, HVAC Control Processor, IPC

U1169

DTC U1001-U1254

BCM, HVAC Control Processor, MSM, Radio

U1255

DTC U1000 and U1255

BCM, EBCM, HVAC Control Module, HVAC Control Processor, IPC, MMM, MSM, Radio, RCDLR, SDM, VIU

U1300

DTC U1300, U1301, or U1305

BCM, CVRSS, EBCM, MMM, MSM, Radio, RCDLR, SDM

U1301

DTC U1300, U1301, or U1305

BCM, CVRSS, EBCM, Radio, SDM