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there are a couple of reasons it could be, it is possible that the sending unit is bad. It could also be the instrument panel cluster or the PCM, there are some reflashes for the pcm for this issue but you would have to find a dealer or an independent repair shop that has the snap on online programming set up. most of the sending units go bad in these and if it is this there is a newer design from GM for some models
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Does the 1997 GMC Yukon fuel gauge have a controller under the dashboard?
no
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it's in the fuel tank.
Why is my fuel gauge on my 1998 gmc 4.3 liter sierra not working properly?
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how to re & re fuel level module on 1997 jimmy
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how do i remove the fuel pump from the gas tank of a 1997 1500 GMC pickup truck .The trucki has a 4.3 gasengine?
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If you are have fuel gauge problems I would suspect the sending unit in the fuel tank to be at fault. Rarely the gauge is the problem.
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Built into the fuel pump
Your fuel gauge on your 1988 gmc half ton is stuck on 3 4 full how do you fix this?
More than likely the fuel gauge sending unit inside the fuel tank is shot.
What should the fuel pressure be on a 1997 gmc sierra 5.7?
45lbs
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