1986-1989 C4 VATS Bypass Module - Anti-Theft Override Kit
Restore Reliable Starting by Bypassing Faulty Vehicle Anti-Theft System
The factory VATS System (Vehicle Anti-Theft System) was effective at deterring theft of 1986–1989 C4 Corvettes, but age, wear, and electrical faults can leave owners stranded. Our VATS Bypass Module lets you bypass the failed system—ensuring a reliable start while avoiding expensive towing and repair costs. This easy-to-install solution allows the continued use of copied or replacement keys, eliminating the dependency on factory VATS resistance chip keys.
Fits the Following Corvette Models
Fits all 1986–1989 C4 Coupes and Convertibles.
Features
• Permanently bypasses factory VATS for a reliable start
• Simple, no-splice installation – module tucks neatly under dash
• Enables use of non-chipped or duplicated keys
• Quick removal restores original VATS security function
• Also compatible with 1986–1989 Camaro models
Tech Notes
• Specify ignition key code – 1 through 15 – when ordering
• Key code can be obtained from any GM dealer using your original key
• Instructions included for safe, reliable installation
Because Details Matter
Avoid unexpected no-start situations caused by VATS system failure. This module restores control to the driver and provides a smart solution for owners of 1986–1989 C4 Corvettes dealing with intermittent anti-theft lockout issues. Enjoy reliable starting while preserving your Corvette’s original wiring integrity.
Codes 1 through 15 have the following resistance values:
NOTE: This VATS bypass is designed for 1986-1989 Corvettes equipped with the original Pass-Key I system that used a simple starter relay circuit. For 1990-1991, GM revised the wiring and relay design, requiring a slightly different bypass that was the precursor to Pass-Key II. Starting in 1992, GM introduced Pass-Key II, which routes the key’s resistor signal through the Body Control Module (BCM) and communicates digitally with the ECM. Because of this added complexity, a simple resistor-based bypass will not work on 1992-1996 models. To bypass these later systems, you will need a data transponder or more advanced module that can replicate the resistor signal and correctly interface with the BCM.
Also known under these part numbers: (For reference only)
- 601116001
- 601116002
- 601116003
- 601116004
- 601116005
- 601116006
- 601116007
- 601116008
- 601116009
- 601116010
- 601116011
- 601116012
- 601116013
- 601116014
- 601116015
- 686420326809
- 686420326816
- 686420326823
- 686420326830
- 686420326847
- 686420326854
- 686420326861
- 686420326878
- 686420326885
- 686420326892
- 686420326908
- 686420326915
- 686420326922
- 686420326939
- 686420326946
- 686420326953