Question about 1992 Buick Roadmaster

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Why is my passkey light on? - 1992 Buick Roadmaster

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You likely have a bad ignition lock cylinder. You will have to replace it or bypass the security system.

Posted on Mar 02, 2009


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Programing passkey lll is not working security light just stays on....

Do you have a master key ?
With a master passkey III key (Black), turn ON the ignition, with the engine OFF.
Observe the Security telltale, after approximately 10 minutes the telltale will turn off.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes

Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
With a scan tool, clear any DTCs.

May 26, 2017 | Cars & Trucks

1 Answer

Dash light saying theft something,cant think of second word,but now car wont start

GM Passkey Security Systems: What You NEED To Know. Written by NEWROCKIES Inc., February 7, 2014, GM Passkey, GM VATS
Back in 1986 the GM Passkey security systems, also known as immobilizers, were introduced. In doing so, an expensive was implanted in each and every one of the affected vehicles. Given the impact of the GM Passkey systems in the years since they were introduced, it's not really clear whether the intention was really to provide additional security, or to generate a new revenue stream.

GM PASSKey goes by many names

Over the years, GM has come up with a number of catchy names for these systems:
  • Vehicle Anti-Theft System (VATS)
  • Personal Anti-theft Security System (PASSkey). To be precise, GM PASSkey I, PASSkey II, and - count them - PASSkey III.
  • PASSlock. After all, what good is a key without a lock?

The disabling effect of GM PASSkey Systems

In spite of the efforts to make the systems, generally known in the industry as PASSkey Systems, sound effective and ever more advanced, they are really all pretty much the same.
It doesn't really matter if the vehicle's PASSkey System is controlled by a resistor in the key, by the Theft Deterrent Module (TDM), or by the Body Control Module (BDM).
One of the key attributes that all the GM PASSkey Security Systems share is that they systematically end up immobilizing cars, alright, making it impossible for their owners to start them!
Yes, the many versions may all look different, but they are all based on the same simple idea - so simple, in fact, that you could argue it's not a suitable foundation for building a true security system.
Most importantly, they all end up immobilizing the host vehicle permanently and often before it is even 7 years old. In all cases, your friendly dealer will ask at least $1,000 to fix the problem - which will invariably strike again after some more time.
But wait a minute... what's a car dealership's core business? It's not repairing obscure, crippling vehicle problems, at a reasonable price. It's selling you a new vehicle, as often as humanly possible.
So even if your dealership were inclined to help you repair or replace the GM PASSkey Security System... well, what a coincidence, many of all those versions introduced over the years have been completely discontinued.
In the meantime, your car still won't start, and that won't change unless you have a way to disable or bypass the GM PASSkey System, and so far... you don't. Nor do you have time to figure it out. And your time is money. Money on top of the taxpayer-funded bailout of GM in both the USA and Canada.
So what do you do end up doing? Maybe you junk the lame Chevy. Then you take out yet another loan to buy another one. That's a perfectly happy ending to this story.... for the dealer, for GM, and for the bank.

Don't get me wrong! What I hate is Passkey, not GM!

Look, don't get me wrong. I love GM cars. Most of all, I love Buicks! I love the sound of the engine, the understated attitude, the size.... In fact, I love them so much, that I own two of them! You can even read about
how I saved my '95 Buick LeSabre from the PASSkey trap. And I was recently lucky enough to get my hands on a rich gold 1970 Buick Electra in mint condition, no GM PASSkey Security System in that one, thank you very much!

An ounce of prevention....

Is worth a ton of cure. You remember that saying.
Remove the GM PASSkey "Security" System before it gets a chance to take out your vehicle. Seriously! Even (or especially) if it's still starting every time, just do a full bypass of the PASSkey System with the NEWROCKIES Inc PRO Module and save yourself a great deal of money, time, and aggravation.
And if your vehicle is having trouble starting - trouble that cannot be traced to the usual easy suspects, like the battery or starter motor, get it

Apr 03, 2015 | Cars & Trucks

2 Answers


The Passkey anti theft system and the radio theft deterrent system are completely separate systems, so the answer is no the radio code does nothing to the Passkey. Passkey is a passive system, that is to say it disarms itself and arms itself just by inserting or removing the key from the ignition and locking the door of the car either with the key or the remote. If the Passkey is the source of any problem and is not working correctly then the Security light should be flashing in the dash to indicate a problem. The most common issue with the Passkey 1 and 2 is that the reader located in the ignition switch lock cylinder goes bad, this locks out the fuel pump and the engine will not start. The system can be bypassed but it is not easy.

Oct 15, 2011 | 1995 Oldsmobile Eighty Eight

1 Answer

Car shut down and security light is blinking

Try doing a Passkey security system reset (procedure below), if that is not successful then you will need the dealer to scan the VATS module with controls the security system.


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.

May 10, 2011 | 2000 Pontiac Bonneville

2 Answers

I have a 2000 monte carlo ss 3800 series. Sometimes the security light comes on and car will not start. When security light is not on, car always starts.Any ideas?

The passlock is having issues try this procedure and see if it helps. If it does not the passlock and ignition tumbler may need replaced.

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

Jan 12, 2011 | 2000 Chevrolet Monte Carlo

1 Answer

Se activa security en el tablero

A special security indicator light provides information about system operation and self diagnostics.

The security indicator is controlled directly by the PASSkey(R) decoder module. If there is a PASSkey(R) failure this indicator will be grounded by the PASSkey(R) decoder module with the ignition in RUN, BULB TEST, or START. When the ignition switch is first placed in RUN, BULB TEST, or START the indicator lights for about 2 seconds as a bulb check.

Some vehicles may show additional messages if equipped with Driver Information Center or Body control.


Nov 12, 2010 | 1993 Oldsmobile Eighty Eight

1 Answer

My passkey light is on. How do I turn it off?

have the security issue diagnosed and repaired..

Jun 20, 2010 | 1995 Chevrolet Impala

1 Answer

Passkey light always stays on in my roadmaster

the fuse is located in the fuse block on the far left side of the dash. open the drivers door and the left end of the dashboard pops off. Remove the fuse and reinsert it and it will turn the light off.

Feb 09, 2010 | 1994 Buick Roadmaster

1 Answer

Pass key light blinking car will not start passkey light flashing and my car will not start

Here is a great write-up on the subject. This will get rid of the entire Passkey system and the car will start like new. It was the only thing that saved my 94 Park Avenue: . I had the exact same situation.

May 30, 2009 | 1994 Buick Roadmaster

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