Question about 1999 GMC Jimmy

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Why my 99 gmc jimmy will crank all day long but wont start until I give it a jump

I have changed the crank position sensor, cam sensor, fuel filter, checked the starter, alternator, new battery, ecm, cap and rotor

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  • 260 Answers

The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hot wired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well. http://vatspasslockpasskeysecurityhelp.com/

Posted on Feb 03, 2015

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  • Contributor
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Sounds like not enough voltage to run the ECM from your battery, (but enough to crank it over). With a jump, power is going directly to the terminals. Could be as simple as a film of corrosion on the battery post(s). Can test for that by cranking for 10 seconds, then feel both terminals. ANY heat means resistance (poor contact).
Pull both terminals, clean posts and terminals. Apply a bit of lithium or silicone grease and tighten, try a start.

Posted on Feb 02, 2015

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Not munch left to do, ground wire ,coil, plug wire, fuel pump connection, all wire. That is a real problem

Posted on Nov 17, 2014

  • Denis Mercier Nov 17, 2014

    Not munch left to do, ground wire ,coil, plug wire, fuel pump connection, all wire. That is a real problem

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  • Expert
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Wow, big problem. This may not help because you may have already checked it, but have you checked the ignition coil? If you have, then ignore this. Good luck.

Posted on Nov 17, 2014

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SOURCE: 1999 Yukon cold start problems.

1999 Yukon Start Issue - I have replaced the octopuse, battery, fuel filter, fuel pump, still having problems starting in cold weather, sometimes after a heavy rain.

Any suggestions?

Thanks

Posted on Dec 08, 2008

  • 1118 Answers

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"

  • 1 Answer

SOURCE: 1995 gmc jimmy, bogs down, rpms jump up and down

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Posted on Mar 01, 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

  • 1 Answer

SOURCE: 2006 gmc sierra 1500 stalled and will not start.

i have a 06 sierra that done the same thing and it was the distributer gear stripped

Posted on Dec 08, 2009

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2 Answers

1992 gmc jimmy died while driving now turnsover but wont start


Sounds like you fuel pump may be going out or your line is clogged. Change the inline filter..if that does not do it ..have the fuel pressure tested...good luck..

Mar 02, 2015 | 1992 GMC Jimmy

1 Answer

Starting issues


Yes, the crank shaft position sensor tells the engine when to send fuel and spark to the cylinders in conjunction with the camshaft position sensor. If the crank sensor isn't working properly, the engine doesn't know when do do anything. Depending on what the other codes where, I'd highly suspect the CPS. It's not terribly hard to get at nor expensive of a part, but you will need a diagnostic scanner capable of doing a Crankshaft Learn procedure.

Jan 13, 2014 | 1999 GMC Jimmy

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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

2 Answers

I have replaced my fuel pump, filter, throttle position sensor, and relay on my 1992 jimmy. it runs but everytime it hits idle speed it cuts off. what could that be


It should have an idle air control valve which lets air into the intake to control the idle speed. The valve could be faulty, or dirty, or the throttle body could be dirty. The computer opens and closes the valve to regulate idle speed.

Jul 16, 2012 | 1992 GMC Jimmy

1 Answer

2000 GMC Jimmy, starts up every time, but only runs for 10 seconds then dies. Restarts every time but will not stay running. Replaced fuel pump, fuel filter, CAM position sensor, crank position sensor,...


you say fuel pressure is good, but what is it? what is the fuel pressure when it stalls out? Spec is 60-66 psi and it wont run if its 55 psi. the fuel pump relay should be good if the pump runs. Make sure the ground for the pump is good , G402 should be on left frame rail. you may have had it off to replace the pump? maybe? it may be time to stop guessing and have a repair shop diagnose it for you. You sure have replaced a lot of good parts.

Sep 07, 2011 | 2000 GMC Jimmy

1 Answer

My 99 jimmy will crank but wont start, after a day or two sitting the battery drains. The alternator and battery are only a year old.


it sounds like a fuel problem, cheapest option is to replace fuel filter first if that doesnt work do a bleed test on the fuel line to make sure the fuel pump is working.

Aug 30, 2010 | 1999 GMC Jimmy

1 Answer

1987 gmc jimmy wont start


yea you have no fuel and sound like a bad harness and the gm's are know for there fuel pump harness's! did you change it when you changed the pump? there is a lose connection somewhere in the fuel delivery system and it's pretty simply! i would check the fuel pump relay on the left hand side of the engine compartment and maybe even put power to the pump at the relay position "b" on the fuel pump relay harness and there should be a one pin connector to put power to also connected to the same position on the relay "b" the wire should be tan and white! good luck

Sep 18, 2009 | 1987 GMC Jimmy

1 Answer

1994 GMC Jimmy hard to start and runs rough when first started


did you do a fuel pressure test? if you havent do it its cheep an at least you can elimanate that. if thats not an issue, then there is only two other things crank sensor, and if there is one cam sensor.

Feb 02, 2009 | 1994 GMC Jimmy

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