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International Automotive Technicians Network
Re: Intermittent electrical glitches when hitting rough road
Posted to Technical Discussion Forum on 6/8/2023

I've seen weird issues like that on a few GM trucks that were high mileage or beat to death.

I'd try a tap test on the underhood fusebox. I had many issues on an older 2500HD and a new box cured it. It was surprisingly inexpensive and something that the deal... Login to read more.