The fuel pump on a 1997 Chevrolet Suburban pumps the fluid from the gas tank to the engine. These fuel pumps are mounted in the gas tank and use the gasoline to cool itself. If you run the vehicle low on fuel frequently, you run a risk of overheating the pump. It's a critical component of the fuel injection system, and if it fails, there is no way for the gasoline to get from the tank to the engine--and when that happens, the engine won't be able to run as well.
Lift up the driver's side of the truck using the jack and put it onto jack stands. Crawl underneath the truck and locate the connection between the gas filler neck and the gas cap. Unscrew the hose clamps on the hoses using the flathead screwdriver and pull away the hose.
Put the wood block on the head of the jack. Lift the jack until it contacts the base of the tank. Unbolt the gas tank from the frame using the 3/8-inch ratchet, extension and sockets. Lower it with the jack slowly until you can access the top of the gas tank. Remove the hose clamps on the fuel lines using the flathead screwdriver, then unplug the fuel pump from the tank. Lower the tank all the way and then slide it out from under the frame.
Remove the locking cam mounted around the fuel pump using the brass hammer and brass drift. Lift up the old fuel pump and discard it. Set the replacement fuel pump into the tank and reinstall the locking cam using the brass hammer and drift.
Lift the tank into the frame using the jack. Reattach the electrical connection to the pump and then reinstall the fuel lines with the flathead screwdriver. Attach the pump to the frame using the 3/8-inch ratchet, extension and sockets, then reattach the fuel filler neck to the tank.
