2009 Chevy Silverado 6.0 L. Gauges went crazy died wooden crank wouldn’t do much of anything cleaned up some grounds got it going again month and a half later alternator goes out and then now the truck won’t shift out of first gear and the gauges are going nuts so found more grounds cleaned all those up had it going good for a few days now it’s doing it again I have cleaned every single ground there is to be cleaned except the ones inside the cab The computer picks up so many codes that it’s definitely an electric issue I even got a different fuse panel for it didn’t help

 

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