Question about 1999 Pontiac Sunfire

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PASS LOCK ON 1999 PONTIAC SUNFIRE

How do I replace the Ingition Cylinder on a 1999 pontiac sunfire that has a passlock system

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  • yadayada
    yadayada May 11, 2010

    this is a dealer repair, if u do it u will be unable to start the car and will end up taking it to the dealer for re-programing of the module to accept the new key.

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You need to get rid of passlock or spend a lot of money in the new cylinder and key that only a dealer would make. There is a detailed write-up for bypassing passlock here: http://newrockies.ca . The guy is great, and this was the only way I was able to save my Park Avenue.

Posted on May 01, 2010

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Posted on Jan 02, 2017

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I installed a new steering column in my 2004 Pontiac sunfire and now it will not start. It tries then I beta back fire.


Anti-theft system isn't allowing it too .
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)

Feb 05, 2017 | 2004 Pontiac Sunfire

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Pontiac Sunfire Questions - car won't start - CarGurus

www.cargurus.com > Questions > Pontiac > Sunfir

CarGurusAug 16, 2011 - car won't start - replaced ignition lock on 2002 pontiac sunfire antitheft light is ... system goes into fail safe mode and you won't have any more problems. ...lock cylinder on 2003 pontiac sunfire....when new lock cylinder was ...

Sep 10, 2015 | Pontiac Cars & Trucks

1 Answer

( 1998 Pontiac sunfire ) Is it possible just to remove the vtd on a 1998 pontiac sunfire and how can I find out if it does have the vtd on this 1998 pontiac sunfire ...car is not starting ...ruled out...


Security light lit on the instrument cluster ? It should have anti-theft system . No , can't just remove it . It has componets - key lock cylinder housing , software programmed into control modules etc... If you just removed or disconnected the pass lock sensor the pcm -engine computer would not see a coded message ,so it would disable fuel injectors an maybe starter . Your best bet ,have a qualified repair shop diagnose it .

Sep 11, 2017 | 1998 Pontiac Sunfire

1 Answer

Is it possible just to remove the vtd on a 1998 pontiac sunfire and how can I find out if it does have the vtd on this 1998 pontiac sunfire ...car is not starting ...ruled out everything else ! Any help...


Is the security light lit on the instrument cluster ? The vehicle has spark ? Does it have fuel pressure ? Did you check with a fuel pressure gauge ? The passlock anti-theft system use's a sensor in the ignition lock assembly .
The Passlock™ lock cylinder is a locking cylinder that turns a rotating magnet past a stationary hall effect sensor. The rotating magnet creates a resistance code (R-Code) that the cylinder sends to the instrument cluster. The Passlock™ lock cylinder interfaces with the instrument cluster through a 3 wire connection. The 3 wires have the following functions:
Plus software programmed into the instrument cluster and PCM/ECM engine computer .
There is nothing you can do if the anti-theft system is not working , taking out parts won't do any thing , the software in the computers still won't let it start . Your best bet ,take it to a GM dealer .

Oct 19, 2017 | Cars & Trucks

1 Answer

How do you by pass or turn off passlock on canadian 2000 pontiac sunfire ? engine died and passlock light started started flashing


Here's a link that will help you out. This is a pretty common and expensive problem in GM vehicles.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Jan 24, 2012 | 2000 Pontiac Sunfire

1 Answer

My 1999 pontiac sun fire wont start,i noticed the anti theft warning light is blinking..what should i do? hope to hear from you guys tnx!


Usually this is a problem with the passlock sensor which is part of teh ignition key cylinder. The ignition cylinder will have to be replaced the initialized before the car will start

Oct 16, 2010 | 1999 Pontiac Sunfire

1 Answer

I have a question about my 1999 Pontiac Sunfire. I have a key, that has a hole,with a black center. is that black center for the anti theft system?? and if that key is not used, will that cause problems?...


there is nothing special about your keys , no transponder . Has a hall effect sensor that is part of the ignition lock cylinder housing . You could get a key made at hardware store . woludn't make a difference .
The Passlock™ lock cylinder is a locking cylinder that turns a rotating magnet past a stationary hall effect sensor. The rotating magnet creates a resistance code (R-Code) that the cylinder sends to the instrument cluster. The Passlock™ lock cylinder interfaces with the instrument cluster through a 3 wire connection. The 3 wires have the following functions:
• Power
• Ground
• Data

Is the security light lit on the insturment cluster ? Does the vehicle start an run ?

Sep 10, 2017 | 1999 Pontiac Sunfire

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my 1999 pontiac sunfire drivers door latch is broke can not close the door. i have it pulled shut? how much will a used latch cost, or even 3 bolts for it? all the auto stores/ jumk yards are closed for me to call

Jan 26, 2009 | 2003 Pontiac Sunfire

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