GM Service Manual Online
For 1990-2009 cars only

Description

DTC U1000 Loss of Communications

DTC U1016 Loss of Communications with PCM

DTC U1040 Loss of Communications with TCS

DTC U1056 Loss of Communications with RTD

DTC U1064 Loss of Communications with BCM

DTC U1088 Loss of Communications with SDM

DTC U1096 Loss of Communications with IPC

DTC U1128 Loss of Communications with RADIO

DTC U1160 Loss of Communications with LDCM

DTC U1161 Loss of Communications with RDCM

DTC U1166 Loss of Communications with SCM

DTC U1176 Loss of Communications with RFA

DTC U1255 Serial Data Line Malfunction

DTC U1300 Serial Data Line Short to Ground

DTC U1301 Serial Data Line Short to Voltage