1997 Pontiac Grand Prix Fuel Gauge Stuck

PONTIAC GRAND PRIX
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BRIAN IN OHIO
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  • 3 POSTS
I have a 97 Grand Prix GT. The fuel gauge does not move from the 3/4 position, regardless of the amount of fuel in the tank. The digital RANGE display inthe center of the dash does not change either.

What is causing this, and is it simple enough for me to fix it under the shadetree?
Dec 17, 2006 at 3:29 AM
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BOOTDOG
  • ✓Experienced Mechanic
  • 665 POSTS
the fuel sending unit or instrument cluster is bad. being a GM vehicle it's probably part of the fuel pump. in order to change, the fuel tank will need to come out and replace the fuel pump/ sending unit. to make sure, ask the parts store if the unit is available by itself. also drive the vehicle till you know it's almost empty before removing the tank. good luck :) Here is how to change the pump out in case you need it. Check out the images (Below). Please let us know how it goes


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Dec 19, 2006 at 4:17 AM
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Suggested Repair

The fuel sending unit or instrument cluster is likely bad. On this GM vehicle the sender is often part of the fuel pump, so the tank may need to come out to replace the pump and sending unit. Confirm with a parts store whether the sending unit is sold separately, and drive the car until it is nearly empty before removing the tank.

Conversation Summary

The owner of a 1997 Pontiac Grand Prix GT reports the fuel gauge stays at 3/4 and the digital range display does not change no matter how much fuel is in the tank. The expert says the fuel sending unit or instrument cluster is bad, and on a GM vehicle the sender is probably part of the fuel pump. Replacing it typically requires dropping the tank; the owner should check whether the sending unit is available separately and run the tank nearly empty first.

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