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Discussion Starter #1
Have a 06 4500 4wd that I'm having some electrical issues with. The speedometer will read speed up to 40 and then crash out and it also won't switch into 4wd. There's no orange indicator light when all this is going on. I read vss while driving down the road on the autocal and everything appears to be working. When the orange indicator light lights up, the speedometer works. Has thrown a p0502 code in the past, but nothing currently. Anybody else had these issues?

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