GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

U1000

DTC U1000

BCM, HVAC Control Module, PCM (L61), SDM, VCIM

U1016

DTC U1001-U1254

BCM, HVAC Control Module, SDM, VCIM

U1064

DTC U1001-U1254

HVAC Control Module, PCM (L61), SDM, VCIM

U1088

DTC U1001-U1254

BCM, VCIM

U1096

DTC U1001-U1254

BCM, PCM (L61), SDM

U1151

DTC U1001-U1254

BCM

U1153

DTC U1001-U1254

BCM

U1300

DTC U1300, U1301, or U1305

BCM, PCM (L61), SDM, VCIM

U1301

DTC U1300, U1301, or U1305

BCM, PCM (L61), SDM, VCIM

U1305

DTC U1300, U1301, or U1305

HVAC Control Module

U2100

DTC U2100

ECM (L81)

U2103

DTC U2102 or U2103

ECM (L81)

U2104

DTC U2104

BCM, ECM (L81), TCM

U2105

DTC U2105-U2108

BCM, TCM

U2106

DTC U2105-U2108

BCM, ECM (L81)

U2107

DTC U2105-U2108

ECM (L81), TCM