VATS Bypass Module for GM Vehicles — 15 Selectable Key Values (19876–2005)

VATS Bypass Module for GM Vehicles — 15 Selectable Key Values (1986–2005)

Bypass the VATS chipped‑key circuit on many Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. This complete kit includes a 15‑position VATS bypass module and installation materials so you can restore starting without the original VATS key decoder.

Kit contents:

• VATS bypass module with 15 selectable ignition key values
• Solder (1 tube)
• Heat shrink (assorted sizes)
• Wire ties (pack)
• Complete printed instructions

Most common VATS bypass vehicles (1986–2002)

These models are the most frequently serviced with VATS bypass modules. Verify your year/model in the full fitment list before purchase.

• Chevrolet — Camaro (1988–2002); Corvette (1986–2004 C4 & C5); Caprice (1994–1996); Impala SS (1994–1996); Lumina (1995–2001); Monte Carlo (1995–1999)
• Pontiac — Firebird / Trans Am (1988–2002); Bonneville (1992–1999); Grand Prix (1994–1996)
• Cadillac — DeVille (1990–1999); Seville (1990–1998); Eldorado (1990–2002); Fleetwood (1993–1996); Allante (1989–1993)
• Buick — Park Avenue (1991–1996); Roadmaster (1994–1996); Regal (1994–2004 early models); Riviera (1990–1999); LeSabre (1992–1999)
• Oldsmobile — Aurora (1995–1999); Cutlass Supreme (1994–1997); 88 / Ninety‑Eight (1992–1999)

Vehicles most frequently needing bypass due to broken key‑reader wires in the column:

• Camaro / Firebird (F‑body)
• Corvette (C4 & C5)
• Cadillac DeVille / Eldorado / Seville (1990s models)
• Impala SS / Caprice 9C1
• Buick Roadmaster

Key specs & notes:

• 15 selectable resistor/key values via dip switches
• Bypasses the VATS chipped‑key detection only; a properly cut mechanical key is still required to turn the ignition
• Basic wiring and soldering required; kit includes solder and heat shrink
• Not a replacement for immobilizer systems that use separate transponder modules beyond GM VATS
• Before you buy: Verify your vehicle uses the GM VATS system (black pellet/resistor key) and confirm your year/model is listed above

Installation notes: This kit requires basic wiring and soldering skills. Follow the included instructions exactly. Two safe setup workflows are provided:

• If you can measure your key’s resistor value: Use the included switch‑setting chart to set the dip switches to the matching value before installation.
• If you cannot measure the key value: Install the module and test each dip‑switch setting in sequence. When testing dip‑switch settings, allow the VATS delay (about 3–4 minutes) between attempts as the vehicle’s system resets; this prevents repeated lockouts and preserves the vehicle’s VATS behavior during setup.

Limitations: Does not alter or reprogram PCM/ECM; intended to bypass the VATS key detection circuit only. If your vehicle uses a different anti‑theft system (such as a transponder key system), this kit may not apply.

Also see GM VATS Resistor Key Bypass Module Key Value Matched 1986-2004