Why does GM security system lock cars? - Cars & Trucks

This is a very common problem on GM vehicles. The security system is known to fail. Basically when you insert your key, the system checks for certain signal. If the system cannot get the correct signal from the key, it assumes the key is incorrect and goes into SECURITY lockout mode. (prevents hotwiring) This has been happening with GM's for a very long time. There are ways to bypass this now. Read through this page for info, solutions as well.
http://www.diy-gm-security.com/

The security, antitheft or lock picture/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://www.diy-gm-security.com/

The security, antitheft or lock picture/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://www.diy-gm-security.com/

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


If you need further help, reach me via phone at https://www.6ya.com/expert/cynthia_0eebb7da17b33b5e

bet a new key made at the dealer,yours is too worn

The security, antitheft or lock picture/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://www.diy-gm-security.com/

Do It Yourself GM Security bypass

Security failure is a very common problem on GM vehicles. This link may help you out. Good info and possible fix.

http://www.diy-gm-security.com/

The system is automatic and disarms as soon as the key is used or the remote. If it is locking you hurt then it has a fault in the system and you need to have the security system scanned by the GM dealer to see what is locking you out.

You have just fortin stung by GM's antitheft security system. The most failed system ever on GM vehicles. Go to this link for help and info. http://vatspasslockpasskeysecurityhelp.yolasite.com/

The security transmitter in the key could be bad, or the passlock system is bad. try taking it to a GM dealer, so they can reprogram the system