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U1255 Diagnostic Trouble Code Discussion for December 2017

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1255
Help Request Posted
2000 Chevrolet Express 3500 5.7L No Start VIN: 1GCHG35R7Y
U1255: class2 no pwoer. ... heads done put new egr, distributor, ignition control mod, crank sensor . no start eng will turn over but no start. no fuel pump, no fuel gage, no injectors. regular code reader will not work but my new gm scanner will tell me about the alarm system se...
December 29, 2017