The gas gauge on my 99 goes down to half a tank if it goes down that far, then starts going back up again. I'm just filling up when I get to 500 miles on the trip odometer. Is there a fix for this without dropping the tank?
Its seems to be a popular prob with 99 trucks in general for GM. My 99 Savanna flickers but I've seen the symtoms like yours on one of our other Savannas and tank had to come down to get at ground strap. People have posted here with same probs before(From Suburban to C/K)...I know that sucks.:neutral:
My 96 did it when I first bought it, found out it had been doing it since it was new...he was just too damn lazy to check it out. I also had an erratic speedometer...actually reminded me of the old days when you would have to lube the speedo cable...it would jump around sometimes, or just plain not work. Found out from a GM tech buddy of mine that it wasn't too common of a problem, but it did happen on some of the trucks. Turns out the gauge went bad, no ground or fuel pump problem. I replaced my cluster and it has worked fine ever since.
Not saying that would solve your problem, but that's exactly what mine was doing, and it solved it.
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