I have a 99 Yukon that the fuel pump is about to give up.. Im fixing to change it.. I have an idea how to but if there is any tips, hints, or secrets someone can give me please do.. ThanksWhat%26039;s the best way to change a fuel pump on a 99 Yukon?
The only fuel pump is in the tank...
First, drain the tank. Easiest is to siphon into some gas cans and pour it in to your lawn mower and other vehicles. This wont get the tank empty, but the less it weighs the easier it is to handle.
Get you a floor jack ready, it will help. Loosen the front strap as much as you can, then remove the rear strap. Use the floor jack to help hold the rear of the tank to keep from binding and pulling on the hoses. You can reach up on the tank from the passenger side and access the plug and the pressurized and return fuel line. I cannot remember the size wrench that you need to remove the fuel lines. Watch yourself closely when you go to remove the fuel line fittings, They can be sticky, and you can twist the metal line from the sending unit (I tore up mine but luckily it was the return line so I was able to use a hose clamp over the pipe that I cut and cleaned up, if you mess up the pressurized side you will need a new sending unit because the fuel pressure is 60psi, no hose clamp gonna work on that).
Once you get all that mess loose, go ahead and finish removing the front strap and remove the fuel tank from under the vehicle. Take a wire brush and scrub the area around the sending unit to bust free any dirt and gunk build-up. Then blow away with some compressed air. Take a flathead screwdriver and remove the keeper ring that holds the sending unit in place (righty tighty lefty loosy). Put the flathead against one of the vertical tabs and smack the butt of the screwdriver with a hammer or something heavy.
When you remove the sending unit, disconnect the fuel pump, and replace with the new one. Your pump should also come with a new screen that connects to the bottom of the sending unit. When you look in your tank, you can see the baffels and some sand on the bottom is to be expected. Tilt the tank to the sides and you can remove some of the crap on the bottom.
After you get the new pump mounted to the sending unit, you are ready to replace. Getting it back together is just opposite of removal, place sending unit in tank (don't forget the rubber o-ring) and tighten the keeper ring. Muscle the tank back under the Yukon, and hang the front tank strap. Connect your fuel lines, and electrical connection. Then hand your rear tank strap, then tighten them. Pour a few gallons of fuel in the tank and you are ready to fire.What%26039;s the best way to change a fuel pump on a 99 Yukon?
Some vehicles have two fuel pumps... One in the tank and the other is located along the frame. Naturally the one that has to go is the one that is located inside of the gas tank. As far as changing it well there really aren't any tips hints or secrets. You just have to dig in with both hands. The only thing that may help is if your gas tank is almost empty... This will aid in your removing of the tank when the time comes because you won't have all the extra weight to deal with as in a full or partly full tank. So drain the tank if at all possible. Otherwise it is pretty general as to removing the tank. Start by unbolting the tank straps and removing the hose that goes from the tank up to where the hose attaches to the body. Undo any wires that will need to be undone and undo the gas line at the tank or where ever the best spot will be to reach it. Then the tank should be ready for removing. Now the fuel pump is inside of the tank... To remove it there is usually some kind of ring that must be unscrewed to gain access to the pump. Once you have the ring off the pump should lift out as a assembly. When it comes to replacment everything goes back together just the oppsite. You'll probably have to get new hardware for the gas lines cause they aren't made to reuse anymore. Good luck and hope this helps you some.
