International SyTy Registry

GMC Syclone, Typhoon, & Sonoma GT History and Data

The truck has PAS 001 on the side windows and the front of the rear-view mirror. Interior: Console is yellow, made out of a...

The truck has PAS 001 on the side windows and the front of the rear-view mirror.

Interior:

  • Console is yellow, made out of a prototyping plastic.
  • It does have the Syclone seats. But that is the only place (except for the intake) that it says Syclone.
  • The interior carpeting is still the 4×4 carpet, with the hole in the carpet for the 4×4 shifter.
  • It does not have the Sunbird Turbo dash, instead it has some other pontiac dash.
  • It has a turbo gauge, tach, 140mph speedo, and all the other things.
  • SLE badge on the glovebox door.

Engine:

The engine is basically that of a stock Syclone, with a few exceptions:

  • The cam is slightly larger, the pistons are from a turbo 350, and the Turbo is a Garret, instead of Mitsubishi.
  • The intercooler is all custom, built by Garret.
  • The ECM sits in the glove box, and is entirely custom. It can be reprogrammed on the fly, using a laptop computer.
  • The chip stores “defaults” and can be replaced.

The engine has been modified from PAS from it’s original form. It is believed that the intake, turbo, and intercooler have been replaced with semi-‘stock’ parts. The originals are in Marty’s hands, or so we think.

Exterior:

  • The vehicle does not have any ground effects and has S-15 steel bumpers.
  • There is an estimated 350lb weight welded to the rear bumper to keep the rear end down while pulling a Towing Dyno.
  • In the bed of the truck there is a gas cooler box. This cools the gas using NOS.
  • SLE badge on the cab
  • Production Syclone rims and centercaps

Drivetrain:

  • The transfer case came out of the AWD Astro Van, the Front prop shaft was developed at GKN in Auburn Hills, Michigan.
  • The front differential is not that of a Bravada, it is a normal 4×4 diff, that has had the shift mechanisms removed.

We believe this truck was donated to a church group, which then raffled the truck off.