GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

U1000 and U1255

DTC U1000 and U1255

BCM, DIC, EBCM, HVAC Control Module, IPC, MSM, MMM, PCM, SDM, Suspension Control Module, Theft Deterrent Control Module, Transfer Case Shift Control Module, VIU

U1016

DTC U1001-U1254

BCM, IPC, MMM, Suspension Control Module, SDM

U1026

DTC U1001-U1254

PCM, Suspension Control Module

U1041

DTC U1001-U1254

IPC, PCM, SDM

U1056

DTC U1001-U1254

EBCM, IPC

U1064

DTC U1001-U1254

IPC, MMM, MSM, PCM, SDM

U1088

DTC U1001-U1254

BCM, PCM, VIU

U1096

DTC U1001-U1254

BCM, SDM

U1097

DTC U1001-U1254

IPC

U1151

DTC U1001-U1254

BCM, SDM

U1152

DTC U1001-U1254

BCM, DIC, IPC

U1166

DTC U1001-U1254

MMM

U1169

DTC U1001-U1254

MSM

U1300, U1301, and U1305

DTC U1300, U1301, or U1305

BCM, DIC, EBCM, HVAC Control Module, IPC, MSM, MMM, PCM, SDM, Suspension Control Module, Theft Deterrent Control Module, Transfer Case Shift Control Module, VIU