GM VATS (Vehicle Anti-Theft System) Bypass module

(For PASSkey I and II type VATS)

The VATS bypass module is intended for use when installing a GM engine equipped with PASSkeyII type VATS (Vehicle Anti-Theft System) into a vehicle missing the BCM (Body Control Module), permanently bypassing a failing VATS, or for momentarily bypassing the VATS for a remote start system.
The bypass module generates the signal normally sent from the BCM to the PCM/ECM when the proper key is detected. Without this signal, the fuel injectors will not work. Normally it costs between $150 and $300 to have this feature deleted from the PCM. By using our module you will accomplish the same function for less and you won't have to ship your PCM/ECM to have it reprogrammed.
This module will work for all PASSkeyII type engine computers made from 1986 to 2002. See our VATS FAQ page for a list of vehicles that used the PASSkeyII type VATS.
PLEASE NOTE: Any GM vehicle made from 86 to 93 may or may not need the 30 Hz version of our VATS bypass. For engine computers made from 86 to 93 we highly recommend that you purchase, or upgrade too, our DFVATS bypass (Dual-Frequency VATS), which has both the standard VATS signal type as well as the 30 Hz signal type, all in one module.

The VATS bypass module uses a simple three-wire interface (power, ground, signal).
A quick disconnect connector upgrade is available, so that the module can be easily remove to re-enable the factory anti-theft system and protect your car over night or at the car show. YOU CAN'T DO THAT IF YOU HAD YOUR VATS PROGRAMMED OUT OF YOUR PCM/ECM.

This module comes equipped with a status LED that indicates that it is functioning. Available LED colors are red , yellow , green , blue and  white . If a color is not specified you will receive red .

Other Features include:

  • Microcontroller based for reliability and accuracy
  • Waterproof
  • Reverse voltage protection in the event of incorrect power connections
  • Short circuit protection on all outputs to 12V or ground
  • Light weight (31g)
  • Small package (5.4cm x 3.5 cm x 1.5cm)
  • 12 Month Warranty
  • Older 30 Hz version available upon request
  • DFVATS upgrade for $10 more (The DFVATS has both the standard and 30 Hz signals, all in one!)


If you wish to purchase 4 or less modules, you can purchase via Credit Card or PayPal by using the buttons below.  Your order will ship to you via USPS Priority Mail.
If you want to purchase 5 or more modules or would like a different shipping method, please email us (at for a quote. Please include the following in your email - your module selection, quantity and your full shipping address.
For technical questions please email us at


The VATS bypass module was $35 + S&H

Please note: If your vehicle (or engine's PCM/ECM) was made from 1986 to 1993 it may or may not need the 30 Hz version of our bypass module.  Unless you know which you need we recommend that you purchase the DFVATS module which has both the standard as well as the 30 Hz signal types.


Options and Upgrades:
Add The DFVATS Upgrade For $10 More 
Add The Quick Disconnect Upgrade For $10 More 
Add Translucent Color Box Option For $5 More