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How to reset passlock - 2001 Chevrolet Silverado 2500

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Posted on Apr 27, 2015

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How to bypass passlock on 1999 chevy blazer


The most common repair is to replace the ignition lock cylinder due to broken wires inside the steering column. Most common problems related to the Passlock family involve the Passlock sensor. The sensor is part of the ignition lock cylinder on Passlock I and Passlock II systems. ( Where the key goes ), Good-Day!

Aug 27, 2014 | 1999 Chevrolet Blazer

1 Answer

What to do to reset whne driver unknown come up


it looks like a failure in the theft deterrent system, but Trailvoys contain Passlock security, not PassKey. Passlock consists of a hall-effect sensor and tamper resistor within the ignition cylinder housing, while the PassKey system uses a transponder in the ignition key head.

Passlock isn't affected by contamination of the key, but there are a number of things that can cause it to fail - high or low voltages, problems with the Passlock circuits, module communication failures...
Your best bet is to have the diagnostic trouble codes pulled - there are at least eight associated with Passlock failure

Jul 20, 2014 | 2003 GMC Envoy

2 Answers

How do you reset passlock?


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.

Apr 15, 2014 | 2003 GMC Sierra

1 Answer

If I put in a new ignition switch do I have to reset something?


You will probably have to reset the passlock (security) system with the new switch/key. The aftermarket switches come with instructions to reset the passlock code.

Nov 04, 2013 | 2000 Chevrolet Astro

1 Answer

Replaced ignition car wont start


Here is a link that can help you with the bypassing of your Passlock antitheft system. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 25, 2012 | 2000 Oldsmobile Alero

1 Answer

My chevy tahoe will not start and the security system light is on on the dashboard


If the light is flashing it may be an issue with the passlock sensor.Here is a process you can try to reset the passlock. If this process does not work you may need to replace the ignition tumbler and passlock.
PASSKEY LOCKOUT RESET ALL GM CARS 1999 AND UP
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
.

Mar 08, 2011 | 2001 Chevrolet Tahoe

1 Answer

2003 GMC Yukon with new lock cylinder. Passlock won't relearn


un hook the battery cables then try to reset it if that dont work then you will need to take it to a shop to have the passlock code reset

Jan 22, 2010 | 2003 Chevrolet Tahoe

2 Answers

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.

Jan 20, 2009 | 2004 Pontiac Grand Am

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