Question about 1984 GMC K3500

1 Answer

Replace fuel pump 1984 gmc k3500i can't get the pump to seat properly

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 5,081 Answers

Parts needed:
1 Can P.B. Blaster
1 Fuel Pump
1 Fuel pump strainer : (some pumps come with this already if not you will have to purchase, do NOT reuse the old one)
1 Fuel Filter : every time I replace a pump, I always replace this part because it is the number one reason for pump failure. FYI its recommended replacement is every 3 oil changes)
1 Multi-pack of fuel hose connectors
***optional 1 Fuel gauge sending unit: (not needed but while you are in there u might as well replace this especially if you have issues with your fuel gauge

On the 1984 gmc. the fuel pump is located within the tank. I recommend syphoning all fuel from the tank prior to dropping it. Also you may want to raise the vehicle on jack stands just to make your life a little easier. There will be two straps holding it in place prior to doing anything, I would soak the threads of the bolts real good with some P.B. Blaster multiple times before removal. You will have to disconnect the fill neck hose, (given the amount of room) it is usually easier to loosen it at your fuel door. MAKE SURE that the fuel pump wire harness IS DISCONNECTED from the top of the pump assy. On some of the models that I have worked on there may be a cross-member that will have to be removed due to it being in the way, if so soak those bolts with the P.B Blaster as well. Go ahead and remove the nuts from the fuel tank straps, you will have to bend the strap back just a little bit to get the tank to fall, when it does disconnect the fuel lines from the assy and make sure all other lines connected to the tank are removed from the tank. You should be able to slide the tank out from under the vehicle. Although there is not too much to it, just labor intensive, your best bet is getting a Haynes manual to walk you through the process step by step if you have never pulled a fuel tank. The manual usually sells for about 15.00 at any local parts store. Also a second set of hands will make this job a lot easier. I hope that I have answered your question to its fullest.

Posted on Oct 07, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Can you access the fuel tank from inside the cab of gmc jimmy 1984 full size

The tank is mounted under the truck, there is no access plate that I know of.
The pump has a sock filter on the end of it in the bottom of the tank.

Aug 21, 2012 | 1984 GMC K3500

1 Answer

Fuel filter replacement?

i would also check the fliud in my transmission because it may not be letting it go into over drive give these websites a try and wish you the best of luck Michigan Man

Feb 15, 2010 | 1991 GMC K3500

1 Answer

Where are both thermostats located on a 1998 gmc k3500 6.5 diesel , im trying to replace them

Follow the upper radiator hose to the thermostat housing at the front of the engine. Its just above the fuel injector pump.

Dec 17, 2009 | 1998 Chevrolet K3500

1 Answer

Electric fuel pump stills runs when car is turned off

Find the fuel pump relay which might be under the drivers side seat its possible its sticking. Also check the fuel pump reset switch should be located in your trunk sometimes these stick open. Its one of the two and I think its the fuel pump relay. Check both.

May 08, 2009 | 1984 Ford Crown Victoria

2 Answers

Truck just shuts off

I own the same 3500 GMC 6.5 diesel truck with the same problem. We replaced the brain under the upper turbo hood and it fixed it pronto. No more shutoffs

Dec 07, 2008 | 2000 GMC Sierra 3500

1 Answer


You don't need to take either the turbo or the fuellines of to replace the glowplugs. I do not believe you.

May 19, 2008 | 1993 GMC Sierra K3500

Not finding what you are looking for?
Cars & Trucks Logo

114 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

76846 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides