Question about 1999 GMC Jimmy

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99 gmc jimmy wont start has spark, have fuel, wont catch

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Posted on Jan 02, 2017

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SOURCE: will not start

have you tested the fuel pump yet? you do not need to remove it to do so.
if you have not tested the fuel pump yet, test for fuel pressure at the fuel test port on the fuel rail. if you have no fuel pressure, then test for voltage at the fuel pump fuse and relay. if all is well, and your final test for voltage at the weather pac terminal above the tank is good, then you should replace the fuel pump assy, or the wire leading to the pump itself in the tank. 99-01 gm vehicles have a poorly constructed fuel pump wire which tends to cause intermittent connectivity.

to get to the fuel pump, you will need a fuel line tool ( cheap and redily avail) used to diconect the snap over lines from the pump assy. there are two large straps holding the fuel tank in the vehicle, and the tank will need to be removed in order to get the pump assy out. there are two weather pac terminals on the top of the pump assy, and two fuel lines that will need to be removed. finally, the pump is held in the tank by a snap ring. after removal of the snap ring, the unit should lift easily out of the tank.

Posted on Jan 21, 2009

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SOURCE: 2001 gmc jimmy not starting

Did they do a fuel pressure pressure test to determine that its fuel pump? And if so what was the p.s.i.?It should be around 55 to 60 p.s.i. a few pounds under 55 p.s.i. Pump needs replaced, Your shop should have chk. this when it was there the first time. Did they by chance chg. the fuel filter, that can hinder it from starting too.

Posted on Feb 14, 2009

Testimonial: "it was the fuel pump thank you"

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SOURCE: remove airbag 99 gmc jimmy

I actually just took mine out today on a 1998 Gmc Jimmy. Its kind of simple now that ive done it. There are four ten millimeter bolts holding the passenger module in. you will need to drop your glovebox down so it is upside down to see these. It is easier if you take it right off. just take a shop light and look at the bottom of the module you will see two silver bolts (the only two ten mm down there) take them out. Then if you look up underneath you will see another up at the top left. To get this out you can hand wrench it or you can use a mini impact with an ajustable extension. to get the next the easiest way I found was to take off the trim aroung your speedometer get in the drivers seat and there is another ten millimeter nut on the top right (right by the vent holes) take that out then you are unbolted. Without going into tons of details when you start doing it you will quickly realsie how to do it it just takes some patience. Dont forget to pull the fuse before you do anything its a 15 amp fuse second row 3rd up in the panel inside the car. Hope this helps

Posted on Mar 04, 2009

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SOURCE: GMC JIMMY NO START BUT GOT SPARK AND FUEL

try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.

Posted on May 29, 2009

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SOURCE: 2000 GMC Jimmy won't start

i had the same problem and replaced the fuel pressure regulator. Cost about $45 at advance auto store or about $90 at napa auto stores. Once i replace that my truck started right yup and runs like a champ

Posted on Jul 13, 2009

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1 Answer

Gmc jimmy turns over but wont start


Are you getting spark to the plugs when it won't start ?
Injector pulse ?
It sounds like something is shorting out when its hot or wet which could be a number of things, including a wiring harness issue.

Jul 19, 2013 | Cars & Trucks

1 Answer

I have a 99 jimmy with the 4.3 vortec. I have spark, and 61 pounds of fuel pressure. when turned over it act like it starves for fuel and is so close to starting but wont even with starting fluid. I d


It can take 70psi to start a vortec engine cold. It should start on starting fluid tho.
You might want to look at a couple of spark plugs to see if they are in good enough condition to run. The spark could be weak under compression if the plugs are worn.

Aug 05, 2012 | 1999 GMC Jimmy

1 Answer

1992 gmc Jimmy won't start without spraying


check the fuel filter first , then the fuel pump

Jul 15, 2011 | 1992 GMC Jimmy

1 Answer

2004 gmc jimmy, tried to start fired twice didnt catch now just turns over,i can here fuel pump and smell gas.replaced ignition coil??? still wont fire


Check the ECM/BAT fuse. this fuse controls the ECM and the fuel injection circuit. If the fuse is ok, you need to check for voltage at the spark plug. Pull the #1 spark plug. If the cylinder is getting fuel the plug will be wet with gasoline. Put the spark plug wire back on the plug. Now crank the starter and look for a spark from the spark plug electrode. If you can let me know what you find from these tests, I can help you determine the next course of action.

Jan 02, 2011 | 2001 GMC Jimmy

1 Answer

My 99 jimmy died doing 60 mph now it well crank but wont start why?


You have either lost fuel to the engine or spark.You have to check fuel pressure and if that is good then check for spark to the spark plugs.If you don`t have a pressure tester to check fuel pressure then just remove the air cleaner boot to the throttle body and spray some brake cleaner or carb.cleaner into it and if it starts and runs for a few seconds then your fuel pump is probably bad.If no spark then check to see if you have spark from the coil to the distributor.If no spark then you could have a bad coil or ignition module.The ignition module is mounted with the coil.Hope this helps.Good luck.Let me know what you find or if you have anymore questions.

Aug 18, 2010 | 1999 GMC Jimmy

1 Answer

2000 GMC Jimmy wont start. Seems to crank just fine but wont turn over. Sprayed starting fluid in and it didnt chug or do anything but keep cranking so I dont think it is fuel related. Any suggestions?


check for a spark if no spark and no fuel to feed bar for injectors ,then try spare key if that doesnt work then its dealer only to look at immobilisor

Nov 21, 2009 | 2000 GMC Jimmy

2 Answers

What would make my 1999 gmc jimmy turn over but not start


What size engine? You need spark while cranking and fuel pressure thats the basics we can work from there.

Aug 20, 2009 | 1999 GMC Jimmy

2 Answers

My 99` jimmy will not turn over.I had the fuel pump replaced. It seem like it`s not getting in gas. I was wondering do jimmy trucks have a fuel shutoff valve in the back.


your statement is "my jimmy won't turn over"
why are you concerned about the fuel pump?
the fuel pump only supplys fuel to the injectors while the engine is cranking over & runing. You should be looking at a dead battery or faulty starter. Its also possible the engine is locked up. But I would start by trying to jump the battery. If the starter is starting to fail, sometimes you can use a small hammer and lightly hit the starter while someone else is turning the key, this method can be dangerous to the person under the car so be carfull, but it can cause the starter to rotate enough to catch and crank the engine over properly.

If your concern is that the engine is cranking over & wont start, that a different issue.
Your truck does not have a fuel shut off like some Ford products. You can simply depress the shreader valve in the fuel line while the key is on & you should get a lot of fuel to spray out. This would indicate the pump is working and the problem maybe electrical, no spark.

Jul 08, 2009 | 1998 GMC Jimmy

2 Answers

I have a 99 jimmy that wont start


not a lot of help in what you have put was their any noise of it loss of power or anything if it turns over and dosent fire up could possibly be a fuel problem or its not getting a spark to start it

Mar 30, 2009 | 1999 GMC Jimmy

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