Question about 2003 GMC Yukon Denali
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Posted on Jan 02, 2017
SOURCE: 2003 GMC Yukon - fuel pump
Check your ECM fuse. There should be 2 fuses for your ECM. It's the ECM that controls the function of the fuel pump. Good luck friend and it's also common for the wire harness from the frame to the fuel pump to go bad due to corrosion from the bad weather we get in the winter and rainy spring and fall.
Posted on Sep 04, 2009
well i hope its not full of fuel, remove the filler neck from the car should be 3 bolts by the fuel door, there will also be a ground cable up by thefuel door to remove, next you will have to remove the two straps that hold the fuel tank up slowly lower it as you will have fuel lines and elctrical plugs that need to be detached, the fuel lines have quick fittings, you can buy a tool at auto stores to make removing them easier, un plug the wires., once the tank is out there is a snap ring holding hte fuel pump in the tank. taking a hammer and small drift turn the ring this will release the sending unit, so that you can instull the new one, now reassemble
Posted on Sep 27, 2009
I suppose that you mean it starts but doesn't continue to run. And if you try to start it right away it'll just crank. The fuel pump is on in crank but not in run ( maybe ). Find the fuel pump relay in the underhood fuse relay panel and use a test light to cheak the pins for power and ground. First with the test light hooked to a good ground, check to see if it works first ( touch the battery positive ) then touch all the pins of the relay ( removed ) One should be hot all the time ( if not the fuel pump fuse is blown) another should be hot with the key on. one of the others will be hot only in crank ( this is the fuel pump) The last other is ground with the engine running after started. The one thats hot in crank put power to it with a jumper wire and start the engine ( it'll run ) the fuel pump also gets turned on by the oil pressure switch and the fuel pump fuse is blown it'll also not run the engine. But it'll run right after it's cranked and quit
Posted on Nov 16, 2009
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