Syclone: Bargain High Performance
GMC brought out a factory hot rod in 1991 with its Syclone, but with only 2,995 built that model year, you may have not known about it, let alone seen one.
First things first: the spelling of the Syclone’s name. Since the model name “Cyclone” was already registered to Mercury, GMC changed the “C” to a “S” to get around using the name registered to another marque.
The Syclone was GMC’s “bad boy” truck with major-league muscle. It began with a 4.3-liter EFI Vortec V-6 in GMC’s compact S-15 pickup that it had rechristened the Sonoma for 1991. In building the Syclone, GMC
