Remove gastank straps and drop tank remove ring around sendingunit carefully remove the sending unit dont bend the float or gas gauge will be off change your tank and it goes back like it came out
Sounds like you need a new fuel sending unit. It is a big job because the device is located inside the gas tank. You have to drain it, drop the tank, replace unit and reinstall the tank.
It's possible that the sending unit in the tank went bad, or the gauge in your cluster stuck. You can begin by testing the sending unit and seeing if its sending a proper signal.
If it's fine, then I would look into having the cluster checked or replaced. This is all assuming the wiring harness hasn't been tampered with.
Goodluck and please rate
when the fuel pump was installed the gas tank sending unit was either jammed when put back in the tank, is defective, or the sending unit was no reconnected.
U have 2 seperate problems, the gas gauge issue is caused by a defective sending unit in the gas tank, the cutting out will require u take the car in and have the electronic engine control system tested for trouble codes. Does this car have the 5.7 L engine?
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