Question about 2000 GMC Sierra

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Whats the best way to replace fuel pump ? drop the tank or the bed

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According to the factory service manual, you should drop the tank, there are pictures and diagrams with these in the manual.

  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure.
  3. Drain the fuel tank. .
  4. Remove the fuel tank.
  5. Remove the fuel sender assembly.
  6. Note the position of the fuel strainer (2) on the fuel sender.
  7. Support the fuel sender assembly with one hand and grasp the strainer (2) with the other hand.
  8. Pull the strainer off the fuel sender. Discard the strainer after inspection.
  9. Inspect the strainer. Replace a contaminated strainer and clean the fuel tank.
  10. Disconnect the fuel pump electrical connector (5).
  11. Remove the electrical connector retaining clip (6) from the fuel level sensor.
  12. Disconnect the sensor electrical connector (7) from under the fuel sender cover.
  13. Remove the fuel level sensor retaining clip (4).
  14. Squeeze the locking tangs and remove the fuel level sensor (3).
  15. Remove the fuel pressure sensor (1).
A good place to get an inexpensive service manual is from Promanuals it's a complete factory manual.

Posted on Sep 26, 2009

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If you have help its easier and faster to take bed off

Posted on Jul 24, 2010

  • swinada Apr 09, 2011

    For sure way easier to lift the box then to drop the tank. If I remember correctly there is only 4 bolts on each side, take them out than just lift the box on the drivers side, tilt it and support with a few 4x4's or what ever you have laying around. Make sure you prop it up with more thn one thing so if one slips you still got some more to hold it up. Its best to do this with some help but it can be accomplished by one person, I know i've did it a few times and it looks like i'm goinfg to do it again as my fuel pump again will not work. This is pump number 4 for this 2000 GMC and I only have 140'000 km's on it.



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Posted on Jan 02, 2017

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SOURCE: 1999 2500 Chevy 4 x 4 Silverado 4 Fuel Pump

before all that do a pressure test and see if the pump is working..
the tank has to be drained and removed.i would not cut a hole in the box.
disconnect the battery,and ground the pump assembly if you are worried about static.

Posted on May 26, 2009

  • 246 Answers

SOURCE: Is there an easy way to check a fuel pump without dropping tank?

perform a presure test at the engine,but there are two pumps on this models,one low pressyre pump in the tank and a high pressure one mounted on the vehicle frame that is the one that go bad more often,so its not a pain to replace, also you can perform a volume test(this one all you need to do is unhook the line to the fuel rail and place the line in a container,at idle it should pump about a pint in 20 seconds.for the pressure test you need a presure gauge the pressure should be between 40 to 50 pounds and hold it for about 10 min.

Posted on Sep 09, 2009

  • 212 Answers

SOURCE: need to replace fuel pump on 2004 crew cab dodge

It's a lot less work to drop the tank,not that hard of a job if you make sure tank is empty.

Posted on Feb 24, 2010

  • 84 Answers

SOURCE: what is the easiest way to replace fuel pump on

take off the bed and slide it 3 to 5 feet back..and you will have a clear vision of the fuel pump..make sure u disconnect all the light wiring on the rear and the fuel cap and filler hose before removing the bed good luck

Posted on Apr 21, 2010

  • 834 Answers

SOURCE: What is the easiest way to repalce a fuel pump on

Drop the tank.

Posted on Apr 22, 2010

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The fuel pump is in the gas tank, the best way to do this is to get some friends and remove the bed from the frame. There is i believe 8 bolts that hold the bed to the frame, and don't forget to remove the hardware to the gas tank filler neck. Once the bed is off the frame, you can get to the fuel tank. Disconnect the wire harness and might as well replace the harness since there only $12.00 last i looked, disconnect the fuel line and return line. Remove the fuel pump retainer ring and lift up on the fuel pump sending unit. To install replace the rubber O ring and oil it before installing the new fuel pump sending unit. Install the fuel sending unit retaining ring, gas lines, new wire harness, and filler tube. Good lime also to check the hose to the EVAP since you can inspect them, look for any dry rot to the vacuum lines and replace if needed. Reinstall the bed and use lock tight to the bed bolts or replace them with stainless bolts. Good luck and hope this helps, oh and you might as well change the fuel filter while your have the bed off. The other way is to drop the gas tank which means draining the tank and raising the truck. 

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