Question about 1984 GMC K3500

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

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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

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Posted on Jan 02, 2017

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