How many different values of resistance are present in GM VATS factory anti-theft systems?

In GM VATS (Vehicle Anti-Theft System) factory anti-theft systems, there are a total of 15 different resistance values used to determine the vehicle's key presence and to differentiate between authorized and unauthorized keys. This resistance is measured in ohms and is crucial because it is a part of the system's security protocol to prevent vehicle theft. Each resistance value corresponds to a specific key, and the system will only start if the correct resistance value is detected.

This method of employing varying resistance values adds a level of security by creating a range of key types, making it more difficult for unauthorized individuals to replicate or bypass the system without the correct key. Understanding this aspect of GM VATS is important for both diagnostics and security system installations, as it helps in identifying the proper key and its corresponding resistance when working with these vehicles.