How do you replace the fuel pump on a 2001 Chevrolet Impala 3.4L?

Answer 1

You will have to drop the fuel tank to access the fuel pump module.

The 2001 Impala LS's fuel pump and fuel sending unit can be easily accessed through the trunk floor next to the back of the rear fold down seat. I know, because I just replaced mine. There is an oval access plate under the carpet secured by 7 aluminum nuts. Disconnect the fuel filler cap to release fuel line pressure. Then disconnect the negative cable to minumize lthe possibility of sparks while working near gasoline. Remove the plate and you will see the top of the fuel pump/sending unit with 2 wiring harnesses attached and 3 attached fuel hoses. Remove the wiring harnesses by first carefully disengaging the plug clips. Then remove each of the three small fuel hoses by pressing in the clips with a flat head screw driver . I had some difficulty with this and I would strongly advise purchasing an inexpensive fuel line removal tool from an auto parts store to avoid damaging the clips. After removing the wiring harnesses and the fuel hoses from the top of the fuel pump/sending unit, now remove the slotted metal lock ring by using a small chisel and hammer. Hit the ring at an angel to loosen it from the tabs. Once the ring is loosened, all that's left is to lift the the unit out of the tank. But first, wipe away the debris from the top of the unit to avoid contaminating your tank when you pull the unit out and when reinstalling. Also, have a small towel handy along with a bucket because the pump/sending unit will be spilling fuel as you pull it out.After pulling out the old fuel pump/sending unit, installation is the reverse of removal. However, getting the new fuel module back in that small oval opening proved to be the hardest part of what I considered a relatively straight forward repair. Push the disconnected hoses out of the way and patiently work the new pump in. Its spring loaded and once its in the tank, compress it by pushing down on its top until you have the nessesary room to resecure the locking metal ring. The ring will have to be resecure using the hammer and chisel to position the lock tabs back in the ring slots /