First...this is where the pump is (gas tank) on the engines listed:
Illustrating fuel pump and sending unit sensor (3) on 1999-2005 4.8L, 5.3L, 6.0L Engines
Removal & Installation
replace fuel pump for 2002 gmc sierra 2500 - 8e4564e.gif/uploads/images/8e4564e.gif" alt="8e4564e.gif" class="h_mi" />
WARNING
Do not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.
NOTE
Always install a new fuel strainer when replacing the fuel tank fuel pump module.
NOTE
The fuel pump strainer must be in a horizontal position when the fuel sender is installed in the tank. When installing the fuel sender assembly, assure that the fuel pump strainer does not block full travel of the float arm.
SOURCE: REPLACE FUEL PUMP GMC 2002 SIERRa
the pump is in the gas tank siphon the gas out and remove the straps holding the tank(you will also need to remove the three screws holding the filler neck to the truck box under the filler door.)as you drop the tank you will also need to unplug the wiring to the top of the tank and the fuel lines they are usually plastic clips,but if this has been done before and the clips got broken from the first time they could have put clamps in place of the clips.I have found it much faster to remove the truck box itself and that way you don't have to drain the tank and it stays stationary while you RandR the pump with less chance of breaking anything.
Also did you double check the fuel pump relay under the hood in the relay box,I would start there first.
Hope this helps good luck.
SOURCE: replaceing fuel pump on gmc sierra
The fuel pump is located INSIDE the gas tank and is a combination fuel pump/sending unit for the fuel gauge. Be prepared for a large repair bill. About $600!
SOURCE: 03 gmc sierra 2500 hd
Regards,
Tony
SOURCE: 2002 gmc sierra wont start without useing jumper
Yes it has a rubber cover over it in the engine compartment.i would change the relay.good luck.
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