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This 1991 GMC Syclone up for sale on Bring a Trailer (which, like Car and Driver, is part of Hearst Autos) is one of 2995 sold for the model year. With just one owner from new until last year, it ...
The GMC Syclone is a high-performance version of the GMC Sonoma pickup truck. Produced in 1991 by GMC along with Production Automotive Services (PAS) —the same company credited with building the 1989 Pontiac Turbo Trans Am —the GMC Syclone was the fastest production truck for 1991.
Pontiac engineers originally wanted to use an all-aluminum V-8 engine in the TTA. That plan never materialized, so the 3.8L Intercooled Buick Turbo V-6 engine from the Buick Grand National was chosen and equipped with cylinder heads from the existing 3800 Series I V-6, because of their increased clearance at the strut towers and superior flow. [1]
The GMC S-15 became the GMC Sonoma in 1991, and the Sierra trim packages were dropped to avoid confusion with the new GMC Sierra full-size pickup. The GMC Syclone also appeared that year, with an SUV version, the GMC Typhoon, making its debut the year after that. The Sonoma GT bowed in 1992. Added to this was the 4.3 L V6 Vortec W-code engine.
The American automobile manufacturer GM has sold a number of trucks and SUVs under its marque GMC, which began being applied in 1912. [1] The vast majority of GMC vehicles are based upon the same platforms as, or simply rebadged from, vehicles sold in the Chevrolet division of GM. [citation needed]
GMC replaced the Pontiac 223 with their own 228-cubic-inch (3.7 L) 228 in 1939. This OHV (overhead valve) engine was produced through 1953. With a cylinder bore of 3.5625 inches (90.49 mm), this is the smallest low-deck engine. All four low-deck engines have a stroke of 3.8125 inches (96.84 mm) and used 7 inch long connecting rods.