The History and Evolution of Transponder Chip Keys in Chevrolet
Transponder chip keys, also known as key fobs with integrated security systems, have revolutionized the vehicular security landscape. Chevrolet, one of the major players in the automotive world, began incorporating transponder chip technology in the mid-1990s. This move significantly enhanced the security of their vehicles, making it more challenging for unauthorized individuals to gain easy access or steal cars. This article explores the timeline and development of this technology in Chevrolet vehicles.
Introduction of Transponder Chip Technology: 1995 and Beyond
The journey of transponder chip keys in Chevrolet vehicles started in 1995 with the introduction of the first models that featured this innovative security feature. Prior to this, traditional keys were not only easier to duplicate but also posed a significant security risk. Transponder chip keys, on the other hand, employ a sophisticated security mechanism that involves the physical key transmitting coded signals to the vehicle's control module.
From 1997 to 1999: The Pass Lock System
General Motors (GM) did not immediately roll out the transponder chip technology across all their models. Instead, they introduced the Pass Lock system from 1997 to 1999. This system was designed to act as an anti-theft measure, ensuring that only authorized keys could start the vehicle. The Pass Lock system was also called the VATS/PASS (Vehicle Anti-Theft System/Pushbutton Access and Security System) system.
How the Pass Lock System Works:
The Pass Lock system involves a passive sensor mounted on the steering column. When a key with a transponder chip is inserted, the sensor sends a signal to a control module, which then communicates with the electronic control unit (ECU) in the engine compartment. If the key is legitimate, the ECU sends a signal to the fuel injector controller to activate the injectors and start the engine. If an incorrect key is used, no signal is sent, and the engine will not start.
Current Status and Future of Transponder Chip Technology in GM Vehicles
Today, General Motors has largely phased out the Pass Lock system and has adopted transponder chip technology on most of their modern models. This technology has become standard in the automotive industry, making it virtually impossible for thieves to start a car without a legitimate key.
Chevrolet's transition to transponder chip keys was a gradual process. While GM began incorporating this technology in the mid-1990s, it wasn't until 1997 that the Pass Lock system was officially launched. However, confusion can arise when differentiating between transponder chip keys and earlier VATS/PASS systems, which used a visible resistor pellet as an additional security measure. Modern transponder chip keys, on the other hand, rely on complex coding that is nearly untraceable.
Conclusion
The introduction of transponder chip keys in Chevrolet vehicles has significantly improved security measures. Initially introduced in 1995, they have evolved into standard technology that is now ubiquitous across the GM fleet. Understanding the history and function of these keys is crucial for both consumers and locksmiths who need to replace or duplicate these valuable pieces of equipment.