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U1000 Diagnostic Trouble Code Discussion for December 2005

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2003 Buick Rendezvous CX 3.4L MIL Lamp on, radio locks, VIN: 3G5DA03E62
U1000: No class 2 response. Customer had the battery change, and then started to act up --- when starting the vehicle the Driver's message center at instrument panel reads"service engine soon"Not the MIL, the radio screen reads LOCKED,while engine running, and when we turn the ca...
December 14, 2005