Question about 2003 GMC Sierra

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How do you reset passlock?

Reset passlock?

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Thru a dealership.This is a government controlled system.Like they control everything else.But any passlock change must be done thru a dealership.Ya gotta have your paperwork,too.

Posted on Apr 15, 2014

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Turn the key to run position (engine not running) theft light will flash a few times and stay on. Leave for approximately 10 minutes (may take up to 20 min.) And the theft light will turn off. Repeat these steps 3 times. After the third turn the key off and attempt to start.

Posted on Apr 15, 2014

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1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the PASSKEY system to recognize your key

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1 Answer

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.

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2004 pontiavc grand am will not start

Try to reset the passlock first. It's free and won't cost you anything to try. My car did the exact same thing and I didn't see the security light on..I'm not even sure it was on but, reseting the passlock fixed the problem. Look at dvj2a's solution.

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