Question about 2000 GMC Sierra

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The fuel gauge doesn't read right, makin' low fuel light flash

The fuel gauge doesn't read correctly making the low fuel light come on and off. The light comes on many times while driving even if I have a full tank of gas. Is my fuel pump going out? My last car was a 1990 Camaro so I don't know much about the truck yet.
thanks for any help or suggestions, Harley

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If the fuel pump is all in-tank; the sending unit built in to the fuel pump is most likely malfunctioning; if so, this will require removal and replacement of the entire fuel pump, sometimes expensive, others not so much

Posted on Oct 06, 2009

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Yes it is your fuel pump going out. I had the same problem with my truck.

Posted on Oct 12, 2009

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My truck was doing the same thing, and that's what it was. It was the pressure sensor inside the pump. I took it to a dealer and they said it was going to be real expensive to fix so I did it myself. It was a real pain in the *** but you have two options if your looking into doing it yourself, take the bed off or drop the tank because the fuel pump is inside the tank. I just took the bed off it was easier then dropping the tank and was less of a hassle.
Austin

Posted on Oct 08, 2009

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I apologize for the Poor design of the GM "in the tank" fuel pump.
It saved them money on manufacturing - but costs owners a small fortune in repair.
Might be wise to redesign the fuel system... and put an in-line fuel pump in... and disable the GM design.

Ford Mo Co or a novice car owner can improve on this design - but to compete with the higher quality cars coming in from Korea and Japan, GM had to cut costs and do some unwise things... Just continue to own this vehicle and you will be shocked at the difficulity to maintain... (ie - look up replacing the (sure to fail) heat exchanger in the dash of your GM vehicle)

Posted on Oct 18, 2009

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The best way to fix the problem is to get a new fuel sending unit and the problem will be gone

Posted on Nov 01, 2009

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