Question about 1996 Pontiac Sunfire

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How to remove or bypass the factory installed anti theft vehicle immobilizer.

I bought a 1996 Pontiac Sunfire from an auction that had no keys.I had my uncle try to hot wire it but that didnt work. It has a factort anti theft system that I cant seem to bypass even though I went to the junkyard and got another ignition and lock cylinder from a nother Sunfire. How can I get my car to start and not shut off immedietly?

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  • eyeofshera May 11, 2009

    Im not trying to install a remote start system. I called Pontiac and asked them if that year and model had keys that were"chipped" and they said no they just had a normal key.

  • Anonymous May 22, 2009

    what is the correct key pellet resistance on a 1995 pontiac boniville?

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In the 1996 sunfire GM uses an anti theft lock system. It can be triggered by all sorts of things. In order to relinquish this you must have a key to turn the ignition. These are not coded just plain cut keys. Once you attain this you put the key in and turn the ignition to the ACC position and wait ten minutes (theft lock light will turn off), turn off and take key out. You MUST do this 3 times and then the theft lock will be disarmed.

Posted on Jun 02, 2009

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I'm going to assume this has the VATS system with the pellet in the key. You need to know the correct resistant of the factory pellet and bypass the system using that value. A quick google search will result in many articles on how to bypass the VATS system, as it's required when installing a remote start system in most late 80s-mid 90s GM vehicles.

Posted on May 10, 2009

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Related Questions:

1 Answer

I took my ignition out of my 1998 Pontiac Sunfire how do I get past the anti theft system


Tip & How-To about Cars & Trucks
Want to bypass your vehicle security system?

The short answer is you can't! You have to fix the parts that don't work. You reset by disconnecting the battery for 2 hours and reconnect the battery making sure the key is in the ignition.

All modern cars have alarms and immobilizers. There is a chip in the key and a chip in the ignition lock. If both are present, the ECM (engine control module) releases power to the ignition circuit. When you turn the key, the starter spins the engine and you get a spark. If any one of those three items are not in the chain, you get the engine to turn, but no spark. There is no way to beat the system.

The immobilizer is in place to stop exactly what you are trying to do.

Posted by Andrew... on Mar 26, 2016

Oct 06, 2016 | Pontiac Cars & Trucks

1 Answer

Remote start works but shuts off right away


When you say right away....it is as soon as the vehicle starts....or is it 10-15-30 seconds later? Is this a factory remote start? If not, and you installed an aftermarket one, what is probably occurring is that your factory anti-theft system is seeing the vehicle running without the key in the ignition and activates the immobilizer which shuts down the vehicle. Aftermarket remote starts require adapter electronics to bypass the immobilizer until the operator enters the vehicle and inserts the key. This is why most aftermarket alarm systems are installed by trained pros.

Nov 05, 2013 | Dodge Grand Caravan Cars & Trucks

1 Answer

Fob lost and antitheft wont let me start pontiac sunfire


Locate the immobilizer unit. This is a black box, usually situated under the dash close to the steering column. Trace the wires from the immobilizer to the vehicle's wiring harness, and where the original harness was cut, remove the immobilizer wires, and reconnect the original wires. Most fitters simply disable the ignition or starter circuit at the ignition lock wiring and this can easily be reversed.
A professional repair centre or auto electrician may only take less than half an hour for a job like this.

Oct 31, 2012 | 1996 Pontiac Sunfire

1 Answer

Car shut off, will not boost. help me please!


Check around the dash for a light that says "security". GM vehicles are notorious for the anti theft security systems to fail, and immobilize the starter. Of you see this light, go to this link for info and "do it yourself" solutions. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Jun 16, 2011 | 1996 Pontiac Sunfire

2 Answers

Have a 2001 sunfire , replaced complete steering colum will not start,, anti theft system cuts in.can you help


NEED TO RE FLASH ANTI THEFT . TRY THIS LEAVE KEY ON FOR 10 MIN DONT START.CLCLE KEY OFF THEN BACK ON DO NOT TRY TO START. WAIT 10 MORE MIN , REPEAT PROCESS AGAIN, THEN TRY START....

Apr 14, 2011 | 2001 Pontiac Sunfire

1 Answer

I changed the steering column on my 95 sunfire and will start but due to the anti theft system the fuel injectors are almost instantly making my car die. how do i change or reset passcode on the...


I'm going to assume your Sunfire has the VATS system with the pellet in the key. You need to know the correct resistant of the factory pellet and bypass the system using that value. A quick google search will bring up results in many articles on how to bypass the VATS system, as it's required when installing a remote start system in most late 80s-mid 90s GM vehicles.

Dec 25, 2010 | 1995 Pontiac Sunfire

1 Answer

Why the theft system light is on and the car wont start


The key is not being recognized by the anti theft immobilizer. Take to dealer to have problem solved and to maybe have the keys coded to the computer.

Aug 03, 2010 | 1999 Pontiac Sunfire

2 Answers

I have a 1997 pontiac sunfire and the anti theft light blinks as I try to start the car and the car will not start. I have to wait 20-30 minutes before the anti theft lifht goes out and then the car will...


Pass Lock sensor is preventing the car from starting. You need to override it. I used a remote start module. Having this installed bypasses the pass lock sensor.

Nov 25, 2009 | 1997 Pontiac Sunfire

1 Answer

Car won't start - anti-theft light flashing


it sounds like the immobilizer is faulty. this will shut off the electrical feed to the starter motor. you will need to take it to a garage to get this fixed.

hope this helps.

Mar 18, 2009 | 1997 Pontiac Sunfire

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