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U1000 Diagnostic Trouble Code Discussion for March 2010

Class 2 Communication Malfunction


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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
U1000: Class 2 Communication Malfunction. This vehicle will have a no-start condition usually after 30 min. drives but it will do it any time it chooses. There is a GM TSB for this symptom (and codes) that has a repair or checking the ground at the transmission to engine case bolt. I installed shake...
March 20, 2010
2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
U1000: Class 2 Communication Malfunction. This vehicle will have a no-start condition usually after 30 min. drives but it will do it any time it chooses. There is a GM TSB for this symptom (and codes) that has a repair or checking the ground at the transmission to engine case bolt. I installed shake...
March 21, 2010
2005 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NE52E85
U1000: Class 2 Communication Malfunction. after battery replaced last week.car started and ran perfect.customer called a few day later saying car will not start.cranks but no run.car came in on hook today,tow man says it started for him.no start when i tried it.checked for pcm codes.none found.checked...
March 25, 2010
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NW52E02
U1000: Class 2 Communication Malfunction. ... start condition. Found vehicle had security light flashing during no start. Descovered P1631, Incorrect password detected for Passlock system, codes B3128, B3133, and B3138, all related to door lock circuitry (vehicle has aftermarket anti-theft system inst...
March 30, 2010
2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
U1000: Class 2 Communication Malfunction. This vehicle will have a no-start condition usually after 30 min. drives but it will do it any time it chooses. There is a GM TSB for this symptom (and codes) that has a repair or checking the ground at the transmission to engine case bolt. I installed shake...
March 20, 2010
2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
U1000: Class 2 Communication Malfunction. This vehicle will have a no-start condition usually after 30 min. drives but it will do it any time it chooses. There is a GM TSB for this symptom (and codes) that has a repair or checking the ground at the transmission to engine case bolt. I installed shake...
March 21, 2010
2005 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NE52E85
U1000: Class 2 Communication Malfunction. after battery replaced last week.car started and ran perfect.customer called a few day later saying car will not start.cranks but no run.car came in on hook today,tow man says it started for him.no start when i tried it.checked for pcm codes.none found.checked...
March 25, 2010
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NW52E02
U1000: Class 2 Communication Malfunction. ... start condition. Found vehicle had security light flashing during no start. Descovered P1631, Incorrect password detected for Passlock system, codes B3128, B3133, and B3138, all related to door lock circuitry (vehicle has aftermarket anti-theft system inst...
March 30, 2010