2009 GMC Sierra 3500 issue
This may be a long shot but I just developed an issue with the above Duramax. I am currently in the Seattle area and everybody is closed. Truck has been perfect until today, has 70000 miles on it. Ju...
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Just an update, took the truck to a GM dealer in Sumner after 2 independent shops did not want to even look at it and another said they were "stumped".
Dealer said I need a TCM.
Dealer said I need a TCM.
