GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module

U1000

Class 2 Data Link Malfunction. Refer to DTC U1000 and U1255 .

BCM, EBCM, IPC, SDM

U1016

Loss of PCM Communications. Refer to DTC U1001-U1254 .

BCM, EBCM, IPC, SDM

U1040

Loss of EBCM Communications. Refer to DTC U1001-U1254 .

BCM, IPC, SDM

U1064

Loss Communications with Body Control System. Refer to DTC U1001-U1254 .

EBCM, IPC, SDM

U1088

Loss of SIR/SDM Communications. Refer to DTC U1001-U1254 .

IPC

U1096

Loss of IPC Communications. Refer to DTC U1001-U1254 .

SDM

U1153

Loss of HVAC Communications. Refer to DTC U1001-U1254 .

BCM

U1300

Class 2 Data Link Low. Refer to DTC U1300 .

BCM, EBCM, SDM

U1301

Class 2 Data Link High. Refer to DTC U1301 .

BCM, EBCM, SDM