Question about Cars & Trucks
The passlock light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterperates this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle.
This link may help you find ways to bypass this or fix it yourself.
Posted on Apr 26, 2013
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Posted on Jan 02, 2017
I believe it is the 3 and 5 buttons on the radio it will bring up the #'s keep pushing them until you get your code all typed in.
Posted on Nov 03, 2008
on the ignition key you have to change the ignition baril put new one in try to start it wont leave the key on theft light will flash for 20 minute turn key off and start it thanks pierre
Posted on Nov 30, 2008
SOURCE: HOW DO I RESET THE ANTI-THEFT
If its a factory installed radio and not an aftermarket radio, only dealerships can reset the radio for you. The reason for being is dealerships needs to be sure that his or her radios are not stolen.
Posted on May 18, 2009
SOURCE: theft deterrent
call 1888mitsu2001, choose option #4, then hit * (star). give the operator the last 8 numbers in your vin and they will provide the radio code for FREE!
DO NOT PAY FOR THE CODE ONLINE OR GO TO THE DEALER (they will also charge you).
Posted on Jul 02, 2009
SOURCE: pass lock problems
Your Passlock may need to relearn the ignition keys, if the
ignition lock has gone bad like my in-laws Grand Am Gt, here is what i
did so they will not get stranded any more. Buy a Passlock by pass
module for around $70.00. You can order one from GMPASSLOCK.COM in the
mean time try resetting the Passlock. Good luck
Ignition keys relearn takes about 30 min to do. 30-Minute Learn Procedure
1.) Turn ON the ignition, with the engine OFF.
2.) Attempt to start the engine, then release the key to ON; the vehicle will not start.
3.) Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF.
4.) Turn OFF the ignition switch, and wait 5 seconds.
5.) Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6.) Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.
7.) With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.
Without a scan tool you may have momentary starter interruptions while history clears itself.
Posted on Jan 18, 2010
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Feb 18, 2016 | Cars & Trucks
Instrument Cluster and Powertrain control module (PCM)
If the theft light is on there is a problem and a code set. You can try to do reset . Turn the key on , don't try an start the car . Let key on for 10 min. till the light goes out, if it goes out turn ignition off an wait a couple of min. then start the car
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