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:
Vats Code
OHMS Resistance Value
Letter Codes
1
0.402k
None
4
0.887k
EJ or GP
7
1.870k
KH or UN
15
11.800k
U3 or UW
Mid America Motorworks Exclusive