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U1000 Diagnostic Trouble Code Discussion for April 2009

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2000 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12K9Y
U1000: class 2 serial comm. problem. ... engine. it came in with the key stuck in the ignition and could not shut the car off. we replaced the igntiion switch and the key would come out of the ignition but the dash and the parking lights stayed on with the key off. we tested and replaced the engi...
April 22, 2009
2002 GMC Envoy SLE 4.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1GKDT13S62
U1000: class 2 serial communication problem. Ok, this is going to be long... vehicle came in with the complaint that the speedometer quit working. I conducted a gauge sweep test and all gauges worked fine. Then I started retreiving codes. The BCM, IPC, ABS and air bag controllers all gave me a code U1016...
April 27, 2009