The passlock system installed on most GM vehicles for more than a decade has helped to deter vehicle theft. However, sometimes the special passlock system, known as VATS (Vehicle Anti-Theft System), malfunctions, ages, or is damaged and prevents the vehicle's legitimate owner from starting the vehicle. It is potentially very expensive to take the vehicle to a dealer or auto repair shop to have
. the system fixed, as it involves a computer chip inside the key and extensive electronics inside the ignition. However, there are ways to repair or override the system. Keep in mind that if an individual decides to override the system instead of repairing it, that person is at a higher risk of becoming a victim of auto theft. Before attempting to bypass the system, first make sure to try various alternatives to make sure there is not a simple fix available that allows the vehicle to start that was not tried yet.If the security light is flashing, try to cleaning off the computer chip that is on the key. Also, try a different key for the car and see if it works.Several models of GM cars have problems with the security light coming on and flashing or coming on and staying on, and this is an issue caused by the security module, which is part of the ignition lock module. If this happens, check the owner manual for tips on how to handle this. For many models, the manual states that if the security light is flashing or staying lit, wait 10 minutes with the key in the ignition in the on position until the light goes off, then turn the key to the off position, and then try to start the car again. This is generally only a temporary fix.To bypass the passlock system in order to use a remote starter, there are two methods available. One method is to permanently bypass this system, and this method is the simplest. The other is to temporarily bypass the system by putting in relays that maintain all of the system's features but allow the car to start. This is for General Motors vehicles made from 1996 and later.There are step-by-step instructions to bypass the GM passlock on quite a few websites, but one of the best, with high quality pictures and details, is at http://vats.likeabigdog.com/. Remember that bypassing the passlock system makes the vehicle much more vulnerable to theft.More reference links: http://www.bergerweb.net/AleroSecurity/ http://www.jaycorptech.com/tech/passlock.htm
