Question about 2000 GMC Jimmy

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Changed thermostat, now jimmy won't start???

Hey guys it's been a while, Jimmy's been running great until now...... My thermostat was finished so I changed it, went off without a hitch, so I thought! Now she starts for about a second then dies??? I don' understand? Does anyone have any idea what could could be the issue? Any help will be greatly appreciated. Thanks.

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  • 40 Answers

If you unhooked your battery you should check your cables and make sure they're tight, it could just be a loose ground cable.
other possible problems are:
1. something wasn't plugged back in
2. coolant levels are low
3. or the worst possible scenario is that the timing belt broke which would cause the engine to over heat and depending on the year of the engine you've destroyed the top of the engine and it will all have to be replaced.

Posted on Dec 31, 2013

  • 4 more comments 
  • Dave
    Dave Dec 31, 2013

    Well I checked my coolant levels, they are good, didn't unplug anything so I don't think that's it. And nothing broke the truck was running great just didn't have any heat so I don't think the top engine is destroyed.

  • Dave
    Dave Dec 31, 2013

    Any other ideas???.?.

  • stitches0718
    stitches0718 Dec 31, 2013

    what year is the vehicle?

  • Dave
    Dave Dec 31, 2013

    What could I have accidentally unplugged that would cause this???

  • Dave
    Dave Dec 31, 2013

    2000 and I checked the terminals their on there good. Side terminals so they are either on or not lol. Still don't understand what could be the problem?

  • stitches0718
    stitches0718 Dec 31, 2013

    it could be the coil spark sensor. other than that i'd suggest just unplugging the battery for a few seconds and hooking it back up.

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Posted on Jan 02, 2017

csmock132
  • 4669 Answers

SOURCE: My 2000 gmc jimmy will not start. It will turn

Have you hooked up a fuel pressure gauge to the test port on the rear of the intake, drivers side. You can get a fuel pressure tester for about 40 dollars at a part store. It is a real good tool to have in your toolbox. If your Jimmy can't build 55 psi, it won't start.

Posted on Mar 07, 2009

Suraido
  • 195 Answers

SOURCE: 97 gmc jimmy will not start.

Did you also check the ignition system?? Best trick to find out if you have fire on the plugs is to pull one out, put the wire on it like if it was still sitting in the engine, hold it with the threaded part touching the engine so it will be grounded and able to make a spark, and have a friend turn the key inside and try to start it. If it does fire up, ignition should be OK and the problem should reside in the electronics side of the engine. Which means check the Idle Air Control, Throttle Position Sensor, Mass Air Flow/Pressure sensor, and last but not least, the onboard computer.

Posted on Jul 07, 2009

dennymulford
  • 1055 Answers

SOURCE: 2001 GMC Jimmy 4x4 turns over but doesn't start - Fuel pump works

check the fuesable link!!

Posted on Sep 05, 2009

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