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U1000 Diagnostic Trouble Code Discussion for February 2012

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2004 Cadillac CTS 3.6L See Text VIN: 1G6DM57744
U1000: In all other modules on Bus except RIM. ... could type for hours. Car was towed in because shifter won't come out of Park and now key won't release to take out, stays in accessory , but will crank and run. Has U1300 in ECM, and U1000 in all other modules except Rear Integration Module, which does no...
February 09, 2012
2003 Chevrolet Tahoe LT 5.3L Stall, MIL Lamp on, Loss of power VIN: 1GNEC13Z83
U1000: Class 2 data link fault. Vehicle came in with a loss of power complaint, customer said after a short drive ,3-5 miles , ses lite would come on and dash would say reduced power. Could turn off ignition and restart, it would be ok agin for a few more miles. We scanned ecm and found only...
February 22, 2012
2004 Cadillac CTS 3.6L See Text VIN: 1G6DM57744
U1000: In all other modules on Bus except RIM. ... could type for hours. Car was towed in because shifter won't come out of Park and now key won't release to take out, stays in accessory , but will crank and run. Has U1300 in ECM, and U1000 in all other modules except Rear Integration Module, which does no...
February 09, 2012
2003 Chevrolet Tahoe LT 5.3L Stall, MIL Lamp on, Loss of power VIN: 1GNEC13Z83
U1000: Class 2 data link fault. Vehicle came in with a loss of power complaint, customer said after a short drive ,3-5 miles , ses lite would come on and dash would say reduced power. Could turn off ignition and restart, it would be ok agin for a few more miles. We scanned ecm and found only...
February 22, 2012