Built by PAS (Production Automotive Services - Troy, MI, also built the 89 TTA), the Syclone, Typhoon, and S-GT had the distinction of being the quickest production trucks ever to roll off the assemly line.
Both the Syclone and Typhoon utilize a 4.3L Turbocharged Vortec V6, pushing out 285+ HP (disputed to be 330) with 360ft/lbs of torque, with a liquid-cooled intercooler. A multiport fuel system feeds the motor while a TH700R4 automatic transmission puts power down to the AWD drivetrain. 0-60 times range from under 5 seconds (even in the rain!) to a quarter mile time of low/high 13's for the Syclone and mid 13's to low 14's for the Typhoon in stock form. The Syclone's ONLY production year was in 1991 with an estimated 2995 units built, while the Typhoon lasted from 1992-93 with 2500 units built in 92 and 2200 units built in 93. Both trucks feature a specialized ground effects package (known as cladding) and turbine style 16x8 aluminum rims. The Syclone's interior features plush cloth bucket seats with the "Syclone" badge embroidered into the headrest, along with door inserts to match while the 92 Typhoon's feature leather/cloth seats with headrest "Typhoon"embroidery and the 93 features full leather interior with power seats and overhead console. The trucks feature center console holds the leather shifter while a gauge cluster from a Sunbird GT keeps you informed of engine vitals and boost.
Created for sale in 1992, the Sonoma GT took the spot of the Syclone when production ended. With only 806 units produced, the Sonoma GT utilized a high-performance two-wheel-drive version of the sonoma pickup fitted with the L35 195hp 4.3-liter V6 and an automatic transmission and had a "Syclone-like" appearance package.