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1998 GMC two wheel drive 5.7 my fuel gage went crazy an now stuck on full..how to repair an where sensor located?

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The sensor is on the fuel pump in the gas tank

Posted on May 09, 2014

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I WOULD START BY UNPLUGGING THE FUEL PUMP HARNESS ON TOP OF THE FUEL TANK, DOES THE FUEL GAGE GO DOWN TO EMPTY, YES REPLACE FLOAT IN FUEL TANK, NO, REPLACE GAGE.

Posted on May 09, 2014

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6ya6ya
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Posted on Jan 02, 2017

bryant329
  • 125 Answers

SOURCE: TPS in a 1998 GMC Jimmy

the tps is ususally at the side of the throttle body opposite where the throttle cable / tv cable mount.
sometimes it won't start, run, or run erratically. there are ways of testing this unit (by output voltage) before you commit to buying a new one. to test it you will need a dvom (digital volt ohm meter).

just a note: straight from the book... "a broken or loose tps can cause intermitten burst of fuel from the injector and an unstable idle because the ecm thinks the throttle is moving."

Posted on Sep 22, 2008

Richie_asg1
  • 1036 Answers

SOURCE: Gas gage doesn't work

It is possible the sender has failed, and can be replaced.

This sits in the fuel tank, so access has to be gained, usually be removing rear seats, access cover, and removing rivets and fixings.

It would be worthwhile to gain access to it and check first for any corrosion on electrical connectors. With a meter, you can check if it is working or not. If not - order a replacement before replacing it.

Please observe all safety precautions when working on fuel systems.

Posted on Dec 31, 2008

dgjtex
  • 405 Answers

SOURCE: fuel gauge stuck on half full

I can tell you almost for certain your fuel level sending unit is bad, I have been able to fix them though. It requires removing the gas tank and then the fuel pump. You can if your inclined, bend the brushes on the small circuit board over more so they will make better contact on to it. Other wise its a new fuel pump assembly, check all plugs and wiring by unpluging and repluging them to insure no bad connect. It is possible it could be the guage itself, but in thirty years of fixing cars never had a bad guage

Posted on Jan 07, 2009

  • 1986 Answers

SOURCE: fuel sencer location /repair or replace/ fuel gage malfuction

I assume you're talking about the sensor that controls the gauge to tell you how much fuel is left... if so, that sensor is located in the gas tank. It can be quite costly / time consuming to have it replaced as you can't fix the bad sensor... You could also just reset your tripmeter every time you fill up and estimate how much fuel you have left based on what the tripmeter says...

Posted on Aug 11, 2009

Testimonial: "Thanks, I will do just as you said. I thought the same if it ment to remove the tank. How big a deal is it to remove the tank myself."

honeymokey
  • 3113 Answers

SOURCE: 1998 gmc 2500 wont keep running

The anti thieft system is keeping it from running.

Posted on Dec 13, 2009

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It is possible the sender has failed, and can be replaced.

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It would be worthwhile to gain access to it and check first for any corrosion on electrical connectors. With a meter, you can check if it is working or not. If not - order a replacement before replacing it.

Please observe all safety precautions when working on fuel systems.

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