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2014 GMC Sierra VVT stuck on 8 cyl Problem ???
I have a 2014 GMC Sierre with 5.3 engine. VVT has been working u until this 1200 mile trip and driving on table top flat prairie road with no wind it does not change .Mileage has gone from 26 mpg to 20 mpg, I suspect that the VVT solenoid is stuck in this position, HELP
