Question about 1995 GMC Jimmy

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I can run a hot wire to driver side to red wire and fuel pump will come on but when i take the wire off the punmp stops but the gmc want start with or with out the wire could u please tell me the most commuing probems for that year think u verry much

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You can try the fuel pump relay. Replacing this may solve your problem.

Posted on Mar 21, 2011


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Does anyone have any idea where the fuel pump relay is at on a 1987 GMC Sierra EFI pick up truck and how to know if it's the relay or the fuel pump that's gone bad? Any help will be appreciated!

It's in the engine bay somewhere. Here are the 5 wire colors to it: 1) tan & white, 2) orange, 3) black & white, 4) dark green & white, 5) red.

The surest way to test the fuel pump is to hook up a voltmeter or test light on the pump wire at the fuel tank connector-on the harness side, not the tank side. Then see if the pump wire has power with the engine cranking over. If it has power, but won't make the pump work when connected, then most likely your pump is bad. Turning the key to ON will also make the pump come on for 2 seconds (to prime the system), but it is easy to miss that signal, so check for power with the engine cranking.

Look around in the engine compartment, and up around the firewall on driver's side. Look for a red wire with I think a green connector on it. This wire will not be connected to anything. It is the pump prime, for test purposes. If you put 12 volts battery juice into the connector, it should make your fuel pump come on.

Dec 11, 2017 | GMC Cars & Trucks

2 Answers

Is there a fuse or shut off for the fuel pump, can't get it to pump fuel to the engine?

In this diagram, the asd relay supplies voltage to fuel pump. See the red wire, hot all the time, protected by fusible link. Use a test lite check for voltage on that wire? If it is hot, unplug the asd relay use a jumper wire on load side of relay, the load side is that line with arrowhead. Use a jumper wire between red and dark green wire terminals, if the pump runs, hopefully it is ok. The problem would be on control side of relay, right side in picture. The control side of relay needs both voltage and ground.
Any applicable trouble codes?
asd relay-t0ipf1pjp5q14wy0jhyzzx1m-3-0.jpg

Apr 09, 2017 | Cars & Trucks

3 Answers

Just changed fuel pump in 95 gmc jimmy now it wont start where is the gas kill switch

when the key is turnned on do you hear the fuel pump run? if not find the ground wire or wires coming off the fuel pump they are bolted to the frame with a wire brush and or sand paper clean the frame and the wire eyelet for the ground and try restarting it If I'm not mistaken the fuel pump is in the gas tank and you should replace the sending unit as well as the fuel pump... Then check to make sure your getting fuel to your engine... If you are then it has to be spark/fire...lack of that is...Good Luck

Oct 05, 2011 | 1995 GMC Jimmy

2 Answers

Where is the fuel pump fuse located on a 2001 gmc sierra 1500 ? i replaced my fuel pump and now i do not know where the fuse for the fuel pump is .

The underhood fuse panel is marked and the fuel pump relay is there as well and they fail as the pumps fail tooand they need to be replaced if the pump does any way. The ground wire for the pump is sometomes overlooked when putting the tank back in as its on the top of the frame rail on the drivers side nearthe tank. It can be dirty too. Lesten for the pump running by having someone cycle the key with your ear against the tank it should come on and shut off a few seconds later. if its working. some can be put in wight the wires backwards and they run backwards but make no presure. Chaek for fuel pressure at the fuel rail. and many pump failures are because the filer is stopped up or theres somthing other than gas in the tank water) ( sugar ) some new pumps don't make enought pressure. Below 50 Lbs. it won't start. Adding gas or even carb spray to the air inlet may get it stasrted. The air in the system may get out then and it'll be OK. Sometimes the battery will be too low to turn the pump on but the engine will still crank

Feb 07, 2010 | 2002 GMC Sierra 1500

6 Answers

MY 1997 GMC sierra 2500 diesel stalls. you can be doing 70mph and it stalls sometimes restarts right away sometimes not.. You can be driving around town and it stalls also. sometimes it restarts right...

Purchased a new gray Standyne Fuel Solenoid Driver kit with heat sink and extended wire harness. Mounted on left fender well and was able to do the work myself in about an hour. No need for injector pump work. Solved stalling issues and it starts up easier as well. These are all over ebay. Very common issue with this engine, and the GMC knuckleheads knew about it and didn't do anything to educate dealerships on a permanant fix.

Jan 25, 2010 | GMC Sierra 2500 Cars & Trucks

4 Answers

OK i have a 1999 gmc Yukon i just changed the fuel pump spark plugs ing coil control module wires but she still wont crank she starts then shuts off whats wrong HEPL ME PLZ

I suppose that you mean it starts but doesn't continue to run. And if you try to start it right away it'll just crank. The fuel pump is on in crank but not in run ( maybe ). Find the fuel pump relay in the underhood fuse relay panel and use a test light to cheak the pins for power and ground. First with the test light hooked to a good ground, check to see if it works first ( touch the battery positive ) then touch all the pins of the relay ( removed ) One should be hot all the time ( if not the fuel pump fuse is blown) another should be hot with the key on. one of the others will be hot only in crank ( this is the fuel pump) The last other is ground with the engine running after started. The one thats hot in crank put power to it with a jumper wire and start the engine ( it'll run ) the fuel pump also gets turned on by the oil pressure switch and the fuel pump fuse is blown it'll also not run the engine. But it'll run right after it's cranked and quit

Nov 14, 2009 | GMC Yukon Cars & Trucks

1 Answer

Fuel pump fuse keeps popping

You have a short to ground or the pump is starting to go bad. You can run a seperate wire from the hot side of the fuse to your pump to see if it is the pump or if you use an ohm meter to check the wire and the pump. Get's a little technical though.

Jun 02, 2009 | 1996 GMC Sonoma

1 Answer

1998 4.3 1500 sierra gmc

check fuel pump relay outside under hood there is also a pump jumper on driver side single red wire with plug on end where harness comes out of firewall hook up to bypass and see if pump is working also check to see if you plugged pump back in when replaced

May 24, 2009 | 1999 GMC Sierra

2 Answers

Won't start after being shut off in hot weather

Replaced Fuel Pressure Regulator. So Far SO Good

Aug 04, 2008 | 2002 GMC Yukon XL

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