GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

U1000

DTC U1000 and U1255

BCM, EBCM, ECM, EPS, IPC, SDM, VCIM

U1016

DTC U1001-U1254

BCM, EBCM, EPS, IPC, SDM

U1040

DTC U1001-U1254

BCM, ECM, EPS, IPC, SDM

U1048

DTC U1001-U1254

BCM

U1064

DTC U1001-U1254

ECM, EPS, SDM

U1088

DTC U1001-U1254

BCM, IPC

U1096

DTC U1001-U1254

BCM, SDM

U1151

DTC U1001-U1254

BCM

U1255

DTC U1000 and U1255

BCM, EBCM, ECM, EPS, IPC, SDM, VCIM

U1300

DTC U1300, U1301, or U1305

BCM, EBCM, EPS, IPC, SDM, VCIM

U1301

DTC U1300, U1301, or U1305

BCM, EBCM, EPS, IPC, SDM, VCIM

U1305

DTC U1300, U1301, or U1305

BCM, EBCM, EPS, IPC, SDM, VCIM

U2100

DTC U2100

ECM, Radio, TCM

U2103

DTC U2103 or U2104

Radio

U2104

DTC U2103 or U2104

ECM, TCM

U2105

DTC U2105-U2199

ECM

U2106

DTC U2105-U2199

ECM

U2172

DTC U2105-U2199

Radio