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U1800 Diagnostic Trouble Code Discussion for February 2017

Lost Communication With Fuel Injector Control Module


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Trouble Ticket Help Requests for DTC U1800
Help Request Posted
2002 Chevrolet Silverado 3500 6.6L MIL Lamp on VIN: 1GCJC33152
... this truck that sets U1800, U2104 and U2105 every time you drive it. Sometimes takes several miles. Sometimes just idling. Also illuminates the MIL. Symptom are showing up in the transmission shift quality. It is harsh but not all the time. I believe it t...
February 28, 2017