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U0140 Diagnostic Trouble Code Discussion for January 2015

Lost Communication With BCM


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Trouble Ticket Help Requests for DTC U0140
Help Request Posted
2008 Chevrolet Silverado 1500 WT 4.3L No Start, MIL Lamp on VIN: 1GCEC14X48
U0140: Lost communication with bcm. ... crank condition. Found no C.E.L. illumination on dash. Scanned vehicle and no communication with ecm but can communicate with all other modules. checked B+ and grounds all good. Installed new ecm and C.E.L. now flashes on dash. I can communicate with ecm (...
January 08, 2015
2008 Chevrolet Silverado 1500 WT 4.3L No Start, MIL Lamp on VIN: 1GCEC14X48
U0140: Lost communication with bcm. ... crank condition. Found no C.E.L. illumination on dash. Scanned vehicle and no communication with ecm but can communicate with all other modules. checked B+ and grounds all good. Installed new ecm and C.E.L. now flashes on dash. I can communicate with ecm (...
January 09, 2015