GM Service Manual Online
For 1990-2009 cars only

Description

Module

DTC U1000 and DTC U1255 Class 2 Communication Malfunction

SDM, PCM/VCM, ATC

DTC U1016 Loss of PCM/VCM Communications DTC U1001-U1254 Loss of XXX Communications

ATC, SCM

DTC U1026 Loss of ATC Communications DTC U1001-U1254 Loss of XXX Communications

PCM/VCM, SCM

DTC U1041 Loss of EBCM Communications DTC U1001-U1254 Loss of XXX Communications

PCM/VCM, ATC, IPC, SDM

DTC U1056 Loss of SCM Communicatioins DTC U1001-U1254 Loss of XXX Communications

PCM/VCM

DTC U1064 Lost Communication with Body Control System (BCM) DTC U1001-U1254 Loss of XXX Communications

SDM, PCM/VCM, and IPC

DTC U1088 Loss of SDM Communication DTC U1001-U1254 Loss of XXX Communications

DTC U1096 Loss of IPC Communications DTC U1001-U1254 Loss of XXX Communications

PCM/VCM, and SDM

DTC U1000 and DTC U1255 Class 2 Communication Malfunction

BCM, SCM

DTC U1152 Loss of HVAC Communications DTC U1001-U1254 Loss of XXX Communications

DTC U1300 Class 2 Data Link Low

PCM/VCM, HVAC

DTC U1301 Class 2 Data Link High

PCM/VCM, HVAC, SCM and BCM