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  1. #1

    Angry Fuel pump problems

    i just got done rebuilding my engine on my 1994 silverado k1500 not to long ago and when it was ready to start her up that didnt happen. The truck would crank but not start. So we bought a new battery made sure there was gas still nothing. We disconected the fuel lines to the throttle body to see if it was getting gas and it wasnt so then we dissconnected it from the fuel filter to iff if it might be clogged, turns out it wasnt. The fuel pump isnt even pumping gas, i never touched the gas tank or anything so im stumped. i am hoping i dont have to buy a new fuel pump. I know on some fords there is a reset switch behind the kick panal and i was wondering if there was anything like that on my truck, that i have to reset? A friend gave me the idea to run a wire straight from the battery to the pump but im a little hessitant on that. Everything worls fine it just doesnt pump gas.

    any ideas would greatly help me out.

    thanks tyler.

  2. #2


    Check your fuel pump relay before you get too far into tearing it apart.

    Have you tried pouring gas in the throttle body to see if it will start on that?

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

  3. #3


    yeah ive tried that and when i do it seems to need more gas.

    where is the relay located? under the hood?

  4. #4
    Sr. Mechanic raisor87's Avatar
    Join Date
    Jul 2008
    the nasti nati
    Blog Entries


    Is your truck equipped with any kind of factory anti theft devices? You may try holding the key forward in the ACC on position for 10 minutes and then turning it off and then trying to start it. I had this problem on a 2000 chevy malibu, replaced every thing under the sun (battery, fuel pump, relays, filters) and determined it was the ignition. After talking to a dealership service center manager for an hour he reluctantly told me this tip to reset the anti theft

  5. #5
    Jr. Engineer Rumpamuro's Avatar
    Join Date
    Apr 2007
    Mississauga, Ontario (Canada)


    i coulda sworn i posted something in this thread not too long ago. Check the inline fuse grey wire from the relay goes and splices to the fuel pump oil pressure switch, then to a inline fuse, then to splices once more, one to the fuel pump one to the ecm.
    --> Rocco "Rumpamuro"

    --> Apprentice Mechanic (Cars and Trucks)

    --> Mississauga, Ontario (Canada) eh!

    --> Vehicles on the driveway:

    -2008 GMC Acadia SLE AWD

    -2007 Silverado Classic Reg cab, long box.

    -2008 Pontiac Vibe (my dads fuel efficient way to go to work)

    -1996 Pontiac Sunfire GT

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