Alarm won't stop. Think alternator is bad but I don't want to change it. The truck won't start. lights flash and the horn blows. What can I do?


Asked by Jan 09, 2014 at 07:29 PM about the 1998 GMC Jimmy 4 Dr SL 4WD SUV

Question type: Maintenance & Repair

10 Answers


Your antitheft has been set off. Do you have a key fob to unlock the doors?


got the key trying something i saw on fix it.


That's why I wanted to know.You should be able to reset it.

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can I know


can someoneokbe telekinesis to fix this?


First step is to try your spare key. If the theft light is flashing with the key you've always used, it can only be one of two things. Either there is a problem with the chip in the key or there is a problem with the PATS system. There is no way to start it with any kind of reset. If it doesn't start with your spare key, 90% of the time it's the PATS transponder which receives the code from the key. There will be codes stored in the PCM related to this problem. Put your spare key in, turn key on for 4 seconds, see if it will start.


it tries to start. git a new key about a month ago no chip on it. it ran fine till alternator started going. it sarted two weeks till I got the part now it won't start and the alarm goes off.


Instructions 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.

1 of 1 people found this helpful.

tied it no go


Disconnect the battery for an hour then try the last instructions I gave you.

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