Question about 1999 Buick LeSabre

2 Answers

The security light comes on then it takes 3 min to go off started doing every 2 times a month now almost every time i start it do you no what the problem is

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 355 Answers

The resistors will only bypass the key and the lock, while the core security module will remain in the loop.
There is an easy DIY way of bypassing the VATS system entirely, including the TDM (that goes faulty very often with the age of the car). You can find the write-up here:

Posted on Jun 17, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 87 Answers

You have resistor in your key that some people call a chip, but it is simply a resistor. The ignition switch reads the resistance and enables the starter and fuel pump if it is correct and all 1990s GM products with the VATS (vehicle anti theft system) sooner or later have trouble reading the key resistance due to wear on the key and the ignition switch.
Your solutions are relative to your abilities and finances.

1. Most expensive, take it to a dealer or mechanic and have them replace the ignition switch and keys. Cost from $250 to $400 but leaves the VATS system in original condition.

2. Aftermarket VATS bypass modules are available in the $70 to $130 range but then a mechanic will want about the same to install it. All it really is is a box containing enough resistors that you can switch it to match the combination of the 12 different resistor levels produced in the original keys.

3. Requires a small bit of ability but is relatively easy and extremely cheap. (Cost less than $5 for me to do my '97 Riviera) There are 2 small wires leading from the ignition switch that are usually inside of a small rubbery covering somewhat like heat shrink tubing. They feel different than ordinary wires and come off of the ignition switch seperately from the normal ON/OFF/Accessory/Start wires. You will need to remove the lower steering column cover to gain access. Be sure to disconnect the battery and leave the big yellow wire alone, that's the airbag! I took my key to Radio Shack and measured the resistance of the 'chip' then bought 2 resistors that added up to that amount +5% and a pair of bullnose wire connectors. I soldered them in line with each other and a connector on each end of about a 3" piece of wire and put shrink wrap around them. Then I clipped the two 'reader' wires leaving the switch dead ended and put the matching bullnose ends on the two wires going to the VATS, plugged my wire with resistors in line, zip-tied it in place and now the car thinks the proper resistance is in the 'reader'. All other functions of the VATS system are unaffected. The car starts everytime.

Certainly cheap and effective, but if you wallet outweighs your confident as a do-it-yourselfer, please refer to solutions 1 or 2.

The only other option is to continually wait that 3 minutes for the VATS reset which is not only aggravating, it continues to get worse and more often with time.

Hope this helps!

Posted on Nov 13, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

2002 Trailblazer security light on, will not crank, replaced steering column

Did you use the original key and lock cylinder? They are coded for the security system.

Dec 31, 2016 | 2002 Chevrolet TrailBlazer

1 Answer

How can I reset the anti-theft system?

Car Won't Start Because of Anti-Theft System ... - RepairPal > Problems > Cadillac > Eldorado
Problems with anti-theft systems using the raised-chip key can prevent the car ... Car Won't Start and Security Light is On how to fix it what 3 min 2 min 1 min start car. Upvote (34). Flag inappropriate · 1995 Cadillac Eldorado111,257Visitor .... theft systemtrouble on digital read says theft system problem car may not restart ...

BMW EWS II security bypass on 1995 M3 by froggy - YouTube

? 17:46
Jun 28, 2012 - Uploaded by froggy
I show how to bypass the EWS II security system on a 1995 BMW ... froggy 3 months ago .... not ,what i can .

Nov 25, 2015 | 1995 BMW 3 Series

1 Answer

Someone attempted to steal my 1998 Savana Conversion van, I had the steering column replaced and now it still won't stay started, and a security light is on the dash board. Is there a fuel pump reset...

Hi, the security system has to learn the new key resistor in the new column. If you try to start it, leave the key on for 10 mins, the security light will go off. Turn the key off, try to start it again, and release the key. The light will come back on again. Wait another 10 mins, intill the light goes out again. (leaving the key on). This has to be done 3 times total of 30 mins. When the light goes out a 3rd time, the vehicle should start, and run. Remember to turn off the headlamps, heater, radio, etc... as they consume power, and you do not want to kill the battery. Good luck...Coop

Dec 24, 2010 | 1997 GMC Savana

1 Answer

Just bought this 1999 tahoe from my brother in law and out of curosity i went through the fuse box and realized a 10amp fuse was missing from the fuse box which read security so the person that i am i put...

You need to reset the Passlock security system to your Tahoe.

1. Attempt to start the car, let it stall, but DO NOT turn the key off! Leave it in RUN.
2. Wait 10 minutes or until the Theft System light glows steady instead of blinking.
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.

Good luck and thank you for using Fixya.

If that does not work then your may have to do the 30 min relearn. You do basically the 10 min thing with the security light trick instructions above. Here goes this only works if your secuity light is on.

Put key in ignition don't start the car but you want to turn the key all the way on and release it back to the on position wait 10 mins or till the security light stops flashing repeat this the exact same way two more times( dont take key out) ending in about 30 mins total time. this should reset the code to the computer and you should have no more problems with it.

Nov 24, 2010 | Chevrolet Tahoe Cars & Trucks

1 Answer

My security light in my car is on what does that mean?

There is a problem with the theft system. This is the system that pervents the car from starting if the ignition lock cylinder is damaged when someone trys to steal the car.
You can try and do a relearn, it may let the car start after this relearn. The most common cause for this concern is the ignition lock cylinder, it has a computer sensor inside that goes bad, you have to replace the cylinder and program it.
To reprogram/relearn, put on the parking brake(this will keep the headlights from comming on and draining the battery), try to start the car, leave the key in the "on" position. The security light should no be flashing. Wait for tem mins, the light should turn off. At this time, turn the key off for 2 seconds and try to restart. At this point, the car may start, if not let the key stay in the "on" position again for tem mins untill the light turns off. Again turn the key off and try to start the car. It may take 3 times for the system to relearn, if you try 3 times and still no start, you will have to replace the ignition lock cylinder.

Jun 04, 2010 | 1995 Buick LeSabre

1 Answer

I was checking the fuses on my Venture and now it wont start up.

You may have removed the fuse for theecurity system. When you turn the key to start, does the security light start to flash? If it does the security system will need to be reset. Most GM's reset is to leave the key in the run position after you try to start it. It usually takes 30 min in this position to reset. Some times you need to try to start it and leave the key in the run position for 10 min, off and back to the run position for a total of 3 times and on the last time its off go straight to start it position. I have found it by googling resetting security system venture van. Good luck.

Dec 29, 2009 | 2001 Chevrolet Venture

1 Answer

Starting problem

yeah, once the anti-theft light turns on you may have to wait from 3 min. to 10 on other vehicles. This happens due to the ignition switch not recognizing the key, there for setting off the light(alarm). Over time the tumblers inside the switch get stuck or worn out with time. The solution is very expensive because you gotta replace the ignition switch, key lock tumblers and reprogram the key.

Sep 19, 2009 | 1996 Buick Riviera

2 Answers

How do i reset the security system on my 2003 chevy impala

Are you reffering to the alarm or the pass lock system that put the theft light on.....If its the alarm the put the key in the door and unlock it. If its the pass lock system put the key in the ignition and turn it on and try to start the vehicle. After it shuts itself off leave the key on for ten min until the theft light stops flashing the turn key off and try to start it again. This may take a few times....

Jul 24, 2009 | 2003 Chevrolet Impala

2 Answers

Car wont start

Put your key in turn it on dont start wait 10 mins remove key wait 10 seconds repeat this a total of 3 times. If that dont work try a different key do the same thing. If that dont work a dealer needs to probably replace and reprogram your ignition switch and keys

Apr 07, 2009 | 2003 Chevrolet Impala

2 Answers

Security light

no you might need to replace the ignition switch

Apr 04, 2009 | 2005 Saturn ION

Not finding what you are looking for?
1999 Buick LeSabre Logo

181 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8210 Answers

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

Answer questions

Manuals & User Guides