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Passlock on 2005 trailblazer - 2005 Chevrolet TrailBlazer

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Posted on Jan 02, 2017

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SOURCE: does a 2005 chevy trailblazer have an overide if there is a problem with passlock system

Not that I know of. The purpose of the system is to keep it from being stolen.

Posted on Apr 14, 2013


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2009 trailblazer wont start. lights on dash flicker like theres a short and battery keeps dieing. I believe the passlock mag has been removed. how can I bypass so the car can be started.

passlock mag ?????? magnet ???? If so , your vehicle doesn't have this . Your best bet , take it to a qualified GM service center .

Jul 09, 2017 | Cars & Trucks

1 Answer

How to bypass passlock system

Passlock sensor Problem 2001 Chevy Suburban/Truck ...

? 8:04
Jan 29, 2013 - Uploaded by nightbandit007 Passlock sensor issues with 2001 Chevy Suburban. This is not how to bypass the system completely or .

Sep 08, 2015 | 2002 Chevrolet TrailBlazer

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I just installed a new key switch in my 2006 trailblazer it is a napa part now when I start it it will only run for a few seconds and die ?

That is because of the vehicle theft deterrent system ! Do you have a security light lit on the instrument cluster ?
The Passlock?"¢ System is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. If starting is attempted without authorization from the Passlock?"¢ System, the powertrain control module (PCM) will disable engine starting. Start disable may be in the form of fuel disable or starter disable, depending on engine application.
The components of the Passlock?"¢ System are as follows:
The ignition lock cylinder and key

The ignition lock cylinder case, including the Passlock?"¢ sensor

The ignition switch

The body control module (BCM)

The security indicator on the instrument cluster

The powertrain control module (PCM)

Ignition Lock Cylinder Case, Including the Passlock?"¢ Sensor
The ignition lock cylinder fits inside the ignition lock cylinder case and operates the ignition switch when turned by a key with the proper mechanical cut. When the ignition key is used to turn the ignition lock cylinder to crank, start, a magnet on the lock cylinder passes close to the Passlock?"¢ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlock?"¢ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle.
If a magnet from outside of the ignition lock cylinder case is used to attempt to steal the vehicle, the tamper hall effect sensor will be activated. This completes a circuit from the security sensor signal circuit through a tamper resistor to the security sensor low reference circuit bypassing the security resistor. If the ignition switch is forced to rotate without the correct key, or if the ignition lock cylinder is removed by force, the Passlock?"¢ sensor will be damaged and will not operate.

Feb 22, 2015 | 2006 Chevrolet Trailblazer

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It's a 2005 Chevy trailblazer Ls i'm retired on a

You can bypass the passlock system but its not easy and not for someone that is not good with their hands. Look up bypass GM passlock to see if you think you can handle that.

Oct 19, 2014 | 2005 Chevrolet TrailBlazer

1 Answer

How to disable gm passlock

You could build a square wave box to bypass the system. It is much more simpler to replace the passlock transponder.

Jul 01, 2014 | 2005 Cadillac CTS

1 Answer

Why won't my 2005 Trailblazer start and why is The security passlock warning light coming on on the dash ?

I f the light is blinking leave car in run position wait for it to stop takes mine around ten minutes when it stops turn key all the way off then should start right up hope this helps not sure its the same problem I have.

Mar 25, 2014 | Cars & Trucks

1 Answer

Does a 2005 chevy trailblazer have an overide if there is a problem with passlock system

Not that I know of. The purpose of the system is to keep it from being stolen.

Apr 14, 2013 | 2002 Chevrolet TrailBlazer

1 Answer

How do I reset the passlock on a 2005 Ion

Go to this link for a few ways to get thru the infamous Passlock problem.

Nov 07, 2011 | 2005 Saturn ION

2 Answers

My trail blazer 2006 wont start and it has a light on of a car with a lock what does this mean heeelp please as soon as possible emergency

You have now experienced GM's terrible anti theft security system. These systems are known for failing and will cost you an arm and a leg to fix. Anywhere from $350 - $700 plus labor. Most mechanics wont even touch these "PASSkey" security systems.You'll have to go to a Dealer mechanic. The good news is that you can bypass these systems permanently. And you're vehicle is one of these lucky ones that CAN be bypassed. This link should help you find what you need and help inform you of how this system works. TRAILBLAZER 2002 2003 2004 2005 2006 2007 2008 Effected by Passlock/PASSkey Failure. tayjoejoe_17.jpg

Jul 11, 2011 | 2006 Chevrolet Trailblazer

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