Question about 1987 GMC S-15 Pickup
First check to see if you have power at the fuel pump connector. If you dont have power check at the relay. depending on the motor there might be an oil pressure switch that is supposed to turn off the pump if your oil pressure bottoms out. I bypassed my relay and ran it to an ignition circuit on the fuse block. Not the safest way if you get in a crash because the pump will always be on when the ignition is on.
two ways to get to the fuel pump for replacement.
1. Drain and drop the tank then its pretty simple. I don't like to do this, working on your back under the truck with stuff thats going to come loose.
2. Or you can take the bed off, just 4 bolts and disconnect the rear wiring harness. get a friend to help pick it up and move it. then you can work on it from the top down.
just the pump will run $70, but a shop will tag you for $250 labor. give or take.
Always replace the sock filter in the tankwhile you are there. recommend you replace the fuel filter up front at that time too.
Posted on Oct 06, 2010
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Posted on Jan 02, 2017
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