2000 Jimmy will not start after battery replacement - suspect security system


Asked by Jul 03, 2014 at 10:24 AM about the 2000 GMC Jimmy 2 Dr SLS 4WD SUV

Question type: Maintenance & Repair

I had my Jimmy;s  battery die after sitting a long while. So I replaced it with a new one go to start but it will only crank. When I turn the key to RUN I can hear the fuel pump prime but no idiot lights aluminate except for a Blinking Security light and a Red Battery Indicator. I tried to spray ether in to the throttle body but did not have but a little in the can. What I did manage to get in did cause the engine to almost catch but then not catch. I am thinking that maybe the OEM security system is not disengaging and will not allow the truck to start??? I also tried to reset the security system by following
the 30  Minute Learn Procedure. After 15 mins the security light kept flashing and the only other idiot light active was the red battery light.. All fuses were physically removed and checked both under the hood and in the cab. Could it be the ECM? From what I can tell it already has a remanufactured one installed.. Thanks in advance for your time and assistance.

6 Answers


You need to check for spark to the plugs.then make sure you have fuel to your injection line up top.if those are good check connection of cables.also clean your throttle bodie b carefull with the finns.still more to check but those are good starting point DO NOT SPRAY INTO THROTTLE BODIE CAN DO MORE DAMAGE & prob not pcm.let me know if still wont start


OK I now think I have eliminated the ATD being the issue. I performed the following reset: 1 Open the driver's door. 2 Press the power door-lock switch to lock all the doors, with the driver's door still open. The "SECURITY" light will come on. 3 Close the driver's door. The "SECURITY" light will go off after about 30 seconds. The system has been reset. Source: http://www.ehow.com/how_7529821_do-system-2000-gmc-jimmy.html I tested the ATD by opening the drivers side window and activating the ATD. I waited until the Security light goes off then I unlocked and opened the door. The result was the car horn started to honk and did so until I unlocked the door with the FOB key. Hence now I think this is not an issue related to the anti theft device. So where do I go from here....?

5 out of 5 people think this is helpful.

Thanks BREAK... I will do these tests and report back

2 out of 2 people think this is helpful.
Holly Young

my 2000Jimmy when I put the key into the ignition is turned it over it will not start it does not even make a spark I change the fuel pump its is runing i change the fill falter but the car will not start the lock button on the driver side door was clicking every time you drive it or every time you do something with the car it clicks it will not start onconnect the battery we did everything it will not start the pump is running everythings good but it just won't turn over its not making no sound when you turn ducky over it seems like its not getting enough fluid into the system that's what we think it was and now we fixed everything else your missed dunks not starting it has gas we don't know what's wrong

3 out of 3 people think this is helpful.
Holly Young

I tried to lock thing to where you push the button but my driver side door will not shut

1 out of 1 people think this is helpful.

As it turns out there was a huge short in the wireing harness located UNDER the abs system on the drivers side engine compartment. I was lucky the truck did not start to burn just sitting there in the driveway. I traced the problem back from the ECM fuse 2 which was not getting power at all. You may want to check ECM fuse 1 and 2 for power. If they don't have any power look for a short and check under the ABS block.

1 out of 1 people think this is helpful.

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