2000 Chevrolet S10 Replace a Fuel Pump

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The fuel pump on your 2000 Chevrolet S-10 truck uses high pressure to deliver fuel to the fuel injection system, which is a major improvement on the carburetor systems once used for most trucks. The first sign that you may need to replace it comes whenever you notice it slowing down and sputtering even though the gas tank is full. Be sure to change the fuel filter first, and if there is still no major improvement, you can safely assume that the fuel pump needs replacing. Because of its simple construction, it is easily replaced, though the fact that it is contained within the fuel tank means that you will need to remove the gas tank to access it.

Tools Used[edit]

Ratchet and socket set
Gas siphoning kit
Two jack stands
Hammer and punch
New fuel pump assembly

Replace a Fuel Pump[edit]

  • Open the hood, open the fuse panel located under the hood, and remove the fuse for the fuel pump using your hands.
  • Depressurize the fuel system by starting the truck, and letting it run until it dies, then reinsert the fuse.
  • Disconnect the negative ("-") battery cable from the battery using a ratchet and socket.
  • Siphon the gas from the tank using a siphoning kit. Insert the tube into the tank far enough to touch the bottom. Pump the handle on the tube to start the flow of gas to the storage tank, and wait for the flow to stop when the S10's tank is empty.
  • Raise the truck with a jack, place jack stands under the frame rails at the rear of the truck, and lower the jack until the truck rests on the jack stands.
  • Place a jack beneath the fuel tank, and raise the jack until it sits flush with the bottom of the tank.
  • Unbolt the holding straps from the tank using a ratchet and socket. Check to ensure the jack is holding the tank securely.
  • Remove the wiring connections on the upper side of the tank by lifting each wire tab with your hands and pulling it away from its connector. Remove the fuel lines by following the same procedure.
  • Unscrew the hose clamp from the fill hose at the back of the tank with a screwdriver, and pull it off with your hands.
  • Lower the tank with the jack, and gently slide the tank from under the truck.
  • Loosen the retainer ring from the top of the tank by gently tapping it with a hammer and punch in a counterclockwise fashion, then reach in and remove the fuel pump assembly from the tank with your hands.
  • Remove the O-ring in the retaining ring. Replace it with a new O-ring, which should have come with your new fuel pump assembly kit, then insert the new fuel pump assembly into the tank.
  • Secure the fuel pump assembly by tapping the the retaining ring with a hammer and punch in a clockwise fashion until tight, then put the tank back on the jack, slide the jack under the truck and lift the tank with the jack to just a few inches from the top.
  • Reconnect the wires and fuel lines by pushing their individual connectors together with your hands, then reconnect the fill hose to the back of the tank, and tighten the hose clamp with a screwdriver.
  • Raise the tank to the top with the jack, and reinsert and screw in the holding straps with a screwdriver, then raise the rear of the truck with the jack, remove the jack stands and lower the truck with the jack.
  • Refill the gas tank, and reconnect the battery to finish.