Question about 2003 Chevrolet TrailBlazer

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U1000 My 03 trailblazer would not turn over, I replaced the starter and now it starts but runs bad. Dealer siad it needs new flywheel? It has a dtc U1000. What should I do?

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  • Anonymous Mar 12, 2014

    Nissan Altima DTC U1000

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It is a communication error with the ecm from the ignition switch here is the code description

GM Number U1000

Type Network - Manufacturer Controlled DTC - Manufacturer Controlled

Description Class 2 Communication Malfunction Conditions
Cause
DTC B1327, U1300, U1301 and U1305 not current (any particular device on the Class 2 serial data circuit will support some subset of these codes), the ignition switch position requires serial data communication to occur, then at least one operating parameter has not been associated with an identification number within 5 seconds after beginning serial data communication (a default value is used)

Posted on Nov 14, 2008

  • melissa
    melissa Dec 26, 2013

    how can i fix this on my own

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