Question about 2000 GMC Sierra

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2010 gmc won't start

Security light on

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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alicantecoli
  • 22246 Answers

SOURCE: 1998 GMC Sierra won start security

try the spare key and if that doesnt work then call breakdown truck and have taken to dealer

Posted on May 02, 2011

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tayjoejoe
  • 2194 Answers

SOURCE: my security light stays on & won't let my 99 gmc 6.5 diesel sierra start any solutions

Yes, the system is called Passlock, and malfunctions regularly. Go to this link for an explanation of how it works, plus some tricks and tips on how to reset it, or bypass it.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Mar 27, 2012

tayjoejoe
  • 2194 Answers

SOURCE: 2002 gmc sierra won't start, security light came on

The security 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. Remember too, the TDM controls the security light. Sometimes you can have ALL the symptoms and no lights.
This link may help you.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Sep 25, 2012

tayjoejoe
  • 2194 Answers

SOURCE: how do i reset 2010 GMC Yukon XL security system

30 MINUTE RELEARN PROCEDURE

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON, vehicle will not start.
  3. Observe the SECURITY telltale. After approximately 10 minutes, the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
  6. Important: The vehicle learns the password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
  7. Start the engine. The vehicle has now learned the password.
If this doesn't work, it is possible to bypass the security http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Mar 24, 2014

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1 Answer

How do i reset 2010 GMC Yukon XL security system


30 MINUTE RELEARN PROCEDURE
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON, vehicle will not start.
  3. Observe the SECURITY telltale. After approximately 10 minutes, the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
  6. Important: The vehicle learns the password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
  7. Start the engine. The vehicle has now learned the password.
If this doesn't work, it is possible to bypass the security http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 24, 2014 | GMC Yukon XL Cars & Trucks

1 Answer

2002 gmc sierra won't start, security light came on


The security 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. Remember too, the TDM controls the security light. Sometimes you can have ALL the symptoms and no lights.
This link may help you.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sep 15, 2012 | 2002 GMC Sierra

1 Answer

I have a 2010 Nissan Altima and my car won't


either you have alarm system activated,or the fob key needs reprogramming.

Sep 03, 2012 | Cars & Trucks

1 Answer

1998 GMC G 3500 Security lock, Won't start


Will need to re-synchonized the computer with the security module, in order to parirty.

Aug 23, 2012 | GMC G3500 Cars & Trucks

1 Answer

How to get 99 gmc safari to start when the security light on steady and it won't start


I dont have an answer but the vatspasslockpasskeysecuirtyhelp.yolasite.com/ is not a real site its unavailable.

Aug 03, 2012 | 1999 GMC Safari

1 Answer

Truck stalled wouldn't start.


I can understand you being frustrated.
There really is no way to tell if the fuel pump was the problem at this point.
If the security system fails, you should see "security" light up on the cluster.
The key lock has a sensor that reads the chip in the key. If the sensor fails or the chip fails the computer won't let the vehicle start.
Most of the time when the security system is at fault, the vehicle won't start, but it won't cause the engine to stall.
You might want to have someone check the fuel pressure and spark at the plugs if you don't see the security light on the cluster.
Could be the fuel pump relay and a list of other things.
I would probably check the computer for trouble codes too.

Jul 21, 2012 | 1996 GMC Sierra

1 Answer

My security light stays on & won't let my 99 gmc 6.5 diesel sierra start any solutions


Yes, the system is called Passlock, and malfunctions regularly. Go to this link for an explanation of how it works, plus some tricks and tips on how to reset it, or bypass it.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 27, 2012 | 1999 GMC Sierra 3500

1 Answer

I BOUGHT A GMC JIMMY THAT'S MY PROBLEM! JUNK!


A malfunctioning antitheft system can turn off injectors causing just such a problem. Look for a light on the dash that says SECURITY or ANTITHEFT. If this light is present, go to this link for help.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Dec 20, 2011 | 2001 GMC Jimmy

1 Answer

My car alarm went off now car won't start.security light flashes on dash.I HAVE a 2001 GMC jimmy


Try putting the key in the driver's door and locking/unlocking it. This will often reset the onboard security.

Hope this helps

Sep 25, 2011 | 1999 Ford Escort

1 Answer

1998 GMC Sierra won start security light flashes


try the spare key and if that doesnt work then call breakdown truck and have taken to dealer

May 02, 2011 | GMC Sierra Cars & Trucks

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