Question about 2000 Pontiac Grand Prix
Should be a grey wire going to the top of fuel tank connects to fuel guage / when the guage in the tank reads grounded it shows full , no ground it shows empty. if you ground that grey wire and the guage jumps to full then faulty guage if nothing maybe bad ground on the tank itself. the guages are a reostat like a tyco race car gun the more it moves the more it grounds .. good luck
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
SOURCE: gas gauge on a 2000 grand prix
I have a 2000 grand prix and had the same problem. I got it tested and everything tested fine. Then someone told me to replace the gas cap. I replaced it for about $10 and it worked. Might want to start there before you put too much money into it.
Posted on Sep 09, 2008
Hello - you will need to replace your sending unit - which is attached to the fuel pump in the gas tank.
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Posted on Nov 02, 2009
The fuel guage sender on this model is faulty. Some were recalled when new. You need to replace it with a new one. It's attached to the fuel pump just outside the tank. It's a good idea to replace the pump while you are at it since you have to drop the tank to do this. The sender is part of a wire harness that comes with the OEM pump assembly. I strongly urge you to use the AC Delco OEM part for this repair. There are much cheaper after market pumps out there but they come with many complaints of Hard Starting and poor performance.
Posted on Jul 16, 2010
the temperature sending unit on a 97 grand prix 3800 gt(which is also the coolant temperature sensor) is not accurate. the sending unit part of this sensor only sends info to the guage on the dash. the coolant sensor part sends info to the computer of the car. it is located under thermostat and somewhat difficult to get at. i had put a brand new one in and my temperature on my dash is all over the place---even with good thermostat and properly bled system. when i hook up a scanner to my computer, the coolant sensor is sending the computer(ecu??) what seems to be the right temp. anywhere from 194 degrees to 217 when hot. the guage however on dash go from 160 to 260 in less than 2 minutes.
Posted on Mar 13, 2011
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