Question about 2001 Chevrolet Tahoe

1 Answer

Truck will not start due to security system

The security light will not turn off in my 2001 chevy tahoe and now my truck will not start. How can I fix it?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 2,224 Answers

The security icon 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 misinterprets 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 explains it pretty well.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Dec 10, 2013

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
jsmes1027
  • 749 Answers

SOURCE: my chevy tahoe will not start and the security

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
.

Posted on Mar 08, 2011

tayjoejoe
  • 2224 Answers

SOURCE: 2001 tahoe truck stalls and

Normally if its a security issue, it would start back up right away. If the security light appears when this happens, then I'd say it IS most likely a security problem. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Jun 29, 2011

tayjoejoe
  • 2224 Answers

SOURCE: 1999 2dr chevy tahoe security light flashes truck won't start

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) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.



http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Jun 26, 2012

  • 645 Answers

SOURCE: security system will not disengage 1999 gmc tahoe

In order to get the radio code for your 4 door 1999 Saturn, press the preset buttons 2 and 3 down. It should be something like 6892.------------------------------------------------------------------------
tacho pro

Posted on Nov 29, 2012

ajauto57
  • 308 Answers

SOURCE: I have a 2001 chevy tahoe 5.3L but my truck will not turn on, security light does not flash, I get no power to the dash but battery is charged?

is your service soon light on when key is turned on?? if not main cluster problem.

Posted on Dec 16, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 2000 chevy tahoe turns over but wont start


if the security light stays on and is not blinking when the key is turned on , (but do not try to start the car). then you can do a key computor. communication .turn key on and off and[ on ]leave it on for exzactly 10 minutes.the security light will turn off, now take key back to off and now start the car.

Jul 10, 2014 | 2000 Chevrolet Tahoe

1 Answer

Where are all the ground connections on 2001 chevy tahoe


The main grounds wil be on the chassis and the transmission. There will also be some miscalanous grounds throughout the engine compartment. A lot of the grounds for the inside if you dash will be located on the underside of the dash connected to the metal frame that the dash mounts to

Aug 21, 2012 | Cars & Trucks

2 Answers

1999 2dr chevy tahoe security light flashes truck won't start


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) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.



http://vatspasslockpasskeysecurityhelp.yolasite.com/

Jun 23, 2012 | 1999 Chevrolet Tahoe

1 Answer

Service 4WD light is on in my 2001 Tahoe. Where should I start first?


why during the day i have headlights on and other chevys lights are only on the marker left

Mar 22, 2011 | 2001 Chevrolet Tahoe

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

2 Answers

No dash lights in 2001 chevy tahoe. i replaced the light switch. still no dash lights


check and see if you have power to your switch, it might just be a fuse. worse case is you'll have to change the actual lights. was it starting to get dimer and dimmer?

Jun 04, 2010 | 2001 Chevrolet Tahoe

2 Answers

2001 chevy tahoe starting problem.


The radiator bearing has gone bad n needs replaced . Easy fix remove the flux capacitor , fan shroud n fan . Remove and replace the bearing . Then check the fuel pressure with a gauge that u can rent at any auto parts store. Make sure your fuses, n rely
1_11_2016_4_50_57_pm.jpg

Nov 02, 2009 | 2001 Chevrolet Tahoe

Not finding what you are looking for?
2001 Chevrolet Tahoe Logo

438 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85020 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...