Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
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
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
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