Question about 2000 GMC Jimmy

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Alarm is going off not allowing me to start my truck or to reset

50 bellow 0 wind chill tryed to start my jimmy would start but would turn over. Now alarm system is going off and will not let me start my jimmy locked every thing up haven to unhook the battery to get it to stop. Rehooked battery back up but alarm still goes off . Any support you can tell me ? Is there any way you can tell me how to reset it ? Or do you think trying my spare key would work. Thanks.... Joanne

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  • joanne196439 Jan 17, 2009

    factory alarm sytem and havent check my book yet

  • joanne196439 Jan 17, 2009

    What is a keyfob ?

  • joanne196439 Jan 17, 2009

    Tryed both remotes nothen stops the alarm. But didnt try the 2nd key i got with th jimmy .Do you think trying the other set of keys might work ? I have 2 sets i'm useing the set that was least used because on the more used set letters were wearing off the remote.

  • Ron szarafinski May 11, 2010

    factory or aftermarket alarm

  • blueextc3221
    blueextc3221 May 11, 2010


  • blueextc3221
    blueextc3221 May 11, 2010

    while you're in there check to see if there is a fuse for the alarm. Some vehicles factory alarms can be disabled by removing the fuse.

    Does the keyfob not respond? Or you dont have one?

  • blueextc3221
    blueextc3221 May 11, 2010

    Factory alarm or aftermarket?

    Have you consulted your owners manual if it is factory?


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Cover your vehicle with a car cover or Tarp,,,put a heater under the cover or tarp and leave it plugged in,,,you need to thaw this vehicle out first,,it may just be frozen up and shorting out in the control box.

Posted on Jan 19, 2009

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I don't have a button and it wont start how to fix 1996 gmc jimmy

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Try resetting the alarm, using the instructions given at the link below. I'll also copy the text here.

  1. Insert the ignition/door key in the door lock on the driver's- side door of your Mountaineer.
  2. Turn the key to the lock position.
  3. Turn your key to the unlock position.
  4. Turn your key to the lock position.
  5. Turn your key to the unlock position. Your alarm is now disabled. If your key fob works, you can also press the unlock or alarm-disable button on the fob.
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If these instructions don't work, you can try resetting the car's computer by unplugging the battery for half an hour. However, that will reset the keyless entry code, as you can see in the fixya article I link to at the bottom

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