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U0100 Diagnostic Trouble Code Discussion for February 2023

Lost Communication With ECM


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Trouble Ticket Help Requests for DTC U0100
Help Request Posted
2007 Chevrolet Silverado 1500 LTZ 5.3L Hesitation, Cuts out, Stall VIN: 3GCEK13M07
U0100: communication loss with ecm/tcm. u0100 is the code no other codes at all Truck came to me from another shop to me after engine rebuild it will not rev over 3500 without cutting out and going into a limp mode if you keep it under 3500 it runs fine no issues at all tried reflashing ...
February 24, 2023