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1999 sierra cluster and radio cutting in and out

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I just bought a 99 sierra regular cab short bed 2 wd. I literally just brought it home. When I test drove it everything was fine. I went home to pick up my wife and when I returned it was blizzard conditions. I started driving and the gauge cluster and radio cut in and out, with all the idiot lights, message center blinking on and off as if the key was going from acc. to on. When all the lights come on, the speedmoeter and tach go to zero.


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I had many similar symptoms with my used '99. The cause was a busted fog light: water had built up inside. As the truck moved, water would make contact with filaments of broken bulb. Dash lights would flicker/disappear, power windows wouldn't operate, etc. Once I replaced the fog light assembly (about $40) everything was fine.




If that didn't help, maybe you could ask the moderator to move this thread to the "Ask a GM Technician" area where one of the GM techs might help you troubleshoot it.

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