The GMC Yukon is a full-size SUV first manufactured in 1992. Parts are easy to come by, and many maintenance tasks are simple and straightforward. Because of its location on top of the fuel tank, replacing the fuel pump is a bit challenging. It's a task you should be able to do yourself, however, saving you time and labor charges at the auto repair shop.
Relieve pressure in the fuel tank by removing the gas cap. Raise the hood and locate the fuse and relay box on the driver's side over the front wheel. Consult the legend on the inside of the cover and remove the fuel-pump relay fuse; pull it up and out of the retainer with your fingers. Turn the ignition and attempt to start the car; if it runs, allow it to stall. Turn off the ignition. Remove the negative terminal clamp from the battery with an adjustable wrench.
Remove the fuel from the fuel tank, using a siphoning kit. Pump the fuel into an approved container and store in a safe place away from sources of fire or spark.
Raise the rear of the car with a floor jack and place the vehicle on jack stands. Locate the EVAP canister next to the fuel tank. Remove the quick-connect hoses from the canister by squeezing the tabs together and pulling the hoses out. Remove the canister-mounting-bracket bolt with a socket wrench and then remove the EVAP canister.
Disconnect the fuel supply and return lines from the fuel tank, using a GM fuel-line-separator tool kit. Remove the fuel filler and vent hoses by unscrewing the clips with a flat-head screwdriver and pulling the hoses off.
Place a transmission jack under the fuel tank and raise the mechanism so it supports the fuel tank. Disconnect the fuel-tank straps by removing two bolts with a socket wrench. Lower the tank a few inches and remove the electrical connectors, fuel-level indicator and fuel-pressure sensor; squeeze the plastic tabs and pull the connectors out. Lower the jack and remove the fuel tank.
Release the locking tab from the fuel-pump module by prying it up with a flat-head screwdriver while turning the retaining ring counterclockwise with a pair of wide-mouth, groove-joint pliers. Carefully remove the fuel-pump module from the tank.
Install a new seal on the new fuel-pump module. Align the fuel-line fittings and seat the module in the tank. Engage the locking tab and replace the retaining ring by turning clockwise with the groove-joint pliers.
Follow the directions in reverse order to reinstall the fuel lines and fuel tank. Replace the fuse, fuel and battery clamp and start the car to test the new fuel-pump module.
