Question about 1998 GMC Jimmy

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My security light is on and my 98 gmc jimmy will start up then die pleace tell me what to do

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If you have a remote lock on the truck then you just hit the unlock button on the remote and that should fix it.

Posted on Apr 24, 2009

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Hi: If you replaced any of these parts what you are describing will occur... 1 - computer, 2 - body control module, 3 - ignition switch in column. In order for the vehicle to run all 3 items have to be from the same vehicle. The only other condition is that the vehicle has gone into theft mode if original parts are being used. To release from theft mode put key in on position... leave on for 1/2 hour, take key out for 5 minutes then start... problem solved. Hope this helps... please rate suggestion... ty

Posted on May 21, 2009

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definitely sounds like timing after reading over your other posts. I had a pontiac die unexpectedly on me in the same way, but luckily i knew an expert mechanic who filled me in. Passing it on to you as the likely culprit. about 800 to pay someone to do it, or it is actually not hard to do yourself with a socket set, screwdriver, gear puller and a weekend. Did mine with absolutely no experience at all (I was 16) and it worked perfect afterwards.

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Remove the cover off of your ignition switch. On the top there is a small wire connector that, once the truck is running, should be disconnected. This will turn on the 'SECURITY' light. All will be better, except the security light will be on at all times, much cheaper than replacing the ignition switch, however.

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