JET 6 Pak Performance Chip | Auto Transmission w/ Overdrive | 3.42(GU6) or 3.73(GT4) Rear End Gear Ratio

6-position performance chip for the 1981-1995 Chevy trucks/SUV’s with 3.42(GU6) or 3.73(GT4) Rear End Gear Ratio. Features. 6 settings ranging from maximum fuel economy to maximum performance. Please message to confirm compatibility with your year/make/model/engine before placing an order.

Give your GM car, truck or SUV multiple personalities with the push of a button! The JET 6-Pack features 6 uniquely different programs that easily change your engine’s performance to match your driving style from all out performance to gas saving economy mode. The 6-Pack also doubles as a security device with a program that prevents the vehicle from being started by sending no fuel to the injectors.

Position Mode Description
0 Security Will not allow vehicle to
start.
1 Economy For use when maximum fuel
economy is desired. Ok for
use with regular unleaded fuel.
2 Towing Use when towing, can use
regular unleaded fuel.
3 Stage 1 When extra power is desired
requires 89 octane minimum.
4 Stage 2 Ultimate performance gains.
Requires lower temperature
thermostat, minimum 91
octane fuel.
5 Valet Parking For use when you don’t want
anyone “Hot Roddin” your car
or truck, will not let vehicle go
over 2000 RPM or 15 MPH.
6 No Function Setting defaults to Economy.

1981, 1982, 1983, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995

K1500, Silverado, Suburban, 5.7L V8