Question about Cars & Trucks
The bolt heads are under the front wheel innner fender plastic cover now be aware this is a common problem for the gm fuel pump and it usually falls to a wire harness fault around the gas tank
Posted on May 15, 2014
I don't know of a fault in the fuse block, if there is I would by pass it with a inline fuse. Check the wiring from the relay to the fuel tank for a short to earth, the insulation may have rubbed through some place.
Posted on May 28, 2015
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Posted on Jan 02, 2017
SOURCE: 2000 S10 4.3L
At the fuel pump relay you should have 1 full time hot wire. 1 hot wire when you turn on the switch. 1 ground, and the other wire goes to the pump. Test the ground to be sure it is good. If so then jump a hot to the one that goes to the pump and see if it runs.If it does then you have a bad relay or ECM. You can swap the relay with another of the same # from tour fuse box to test it.There is also a ground on top of the frame near the filler neck, check it too. Good Luck
Posted on May 06, 2009
SOURCE: 2000 S10 4.3L
Did you verify that the relay terminals have the appropriate signals to them?
ECM fuse B (20-amp) should provide power at all times to the orange wire of the fuel pump relay. The relay coil receives ground via the black wire, and relay coil gets power from the dark green/white wire. When the relay is closed, you should have battery power on the gray wire.
The relay trigger wire should have power from the dark green/white wire in terminal 1 of the Vehicle Control Module (VCM) connector for the first couple of seconds after they key is turned to run (to prime the system) and when the truck is running. Checking for all the appropriate signals at the relay is where I would start. That is after I checked for diagnostic codes.
Believe the fuel relay is the middle relay out of the three in the left rear of the glove box. Last thing is to hot wire the fuel pump if you can not get it scanned, see if the pump is bad unless your going to have a shop work on changing the fuel pump.
Good luck and hope this helps. keep me posted.
Posted on May 12, 2009
You may have power there, the PCM will cut power to the pump relay after a few seconds if the motor isn't running. Check it when the keys first turned on - you may have to have to have a helper. If you don't have any power then, check the ecm1 &2 fuses.
Posted on Jan 17, 2011
I would replace the fuel pump and the fuel pump connector, both have problems in this year that cause excessive current draw and blow the fuse and overheat the system. If the relay socket terminals are discolored from heat that must be replaced as well. Of course before replacing any parts have a GM dealer confirm the problems i have guessed are to the cause.
Posted on Jul 09, 2012
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