The GMC Typhoon was a high-performance version of the GMC Jimmy SUV. Produced in 1992 and 1993, the Typhoon was based on the 1991 GMC Jimmy SUV.

Both the GMC Syclone and Typhoon (SyTy) trucks featured a Mitsubishi TD06-17C/8cm2 turbocharger and Garrett Water/Air intercooler attached to a 4.3L LB4 V6 engine with forged pistons, main caps, head gaskets, intake manifolds, fuel system, exhaust manifolds, and a 48mm twin-bore throttle body from the 5.7L GM Small-Block engine. All SyTy's had a GM 700R4 transmission (4L60) 4-speed automatic transmission and a BorgWarner 1372(Syclone)/4472(Typhoon) transfer case splitting torque with 35% forward and 65% to the rear wheels. Both trucks featured all-wheel drive, upgraded brakes, and sport modifications to the standard suspensions. Unlike the Syclone, the Typhoon featured an air-operated self-leveling rear suspension. Output was officially 280hp (209kW) and 360ft·lbf (488N·m), but some stock Typhoons have been measured at over 300hp (224kW) on a dynamometer.

The Typhoon was capable of accelerating from 0-60mph in 5.3 seconds and could do a quarter-mile run in 14.1 seconds at 95mph (153km/h). Car and Driver was impressed, comparing the Syclone's performance favorably to the Ferrari 348ts, Chevrolet Corvette, and Nissan 300ZX Turbo. It was a bargain at US$29,970, though the magazine criticized the plasticky interior pieces.

All three trucks were built for GMC by Production Automotive Services of Troy, Michigan. Aside from a handful of prototypes, only 4,697 Typhoons were built by GMC: 2,497 in 1992, and 2,200 in 1993. Unlike regular production Syclones, Typhoons were offered in various color configurations that differed by year, with black/black being the most common.

1992

• Black w/ Black
• Black w/ Gray
• Frost White w/ Gray
• Aspen Blue w/ Gray
• Bright Teal w/ Gray
• Apple Red w/ Gray
• Forest Green Metallic w/ Grey
• Radar Blue w/ Radar Blue (2 total)

1993

• Black w/ Black
• Black w/ Gray
• Apple Red w/ Apple Red
• Apple Red w/ Gray
• Frost White w/ White
• Frost White w/ Gray
• Garnet Red w/ Gray
• Royal Blue Metallic w/ Gray
• Forest Green Metallic w/ Gray
• Raspberry Metallic w/ Raspberry Metallic (2 total)