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1999 Chevrolet Suburban Repair Question


Topics covered: Fuel gauge, Frame, Fuel pump.
Mileage: 238,700 miles.

Asked on October 11, 2012

Fuel guage needle moving crazy jumping side to side?

The fuel gauge needle is jumping side to side. The fuel pump is new. I replaced the old one in 05/2011. When I'm driving, the fuel gauge jumps from "from full to empty to half gallon mark to full to 1/4 gallon mark to empty etc and so on", so is not giving me an accurate reading. It gives me a false reading so I don't know how many gallons I have. I know it's not the float (hope not) maybe an electrical issue. Need help! Thanks alot!
Avatar Asked by hellohiwelcome

Answer

Replied on October 11, 2012

I would be suspecting the tank sender unit, the gauge will not move about on its own like that, i would get the sender out of the tank and tested first.

Tiny Answered by mhpautos (expert)
27,079 answers provided
Replied on October 12, 2012

Mine does the same thing. Not wildly, but like a constant, very fast shaking side to side - the actual distance it moves is slight. The pump bit the dust so I replaced the whole assembly (including the sender). The fuel gauge still does the same thing.

Tiny Answered by dmccrack
1 question asked
Replied on October 12, 2012

I haven't checked mine, but there is a frame ground back there by the tank. I doubt it is the problem, but it wouldn't cost anything to make sure that connection is good!

Tiny Answered by dmccrack
1 question asked