In 1990, Chevrolet introduced a high-performance variant of the 4th Gen Chevrolet C1500 under the Super Sport emblem called the 454 SS. It was available only as a 2WD half-ton regular cab short box. The 454SS was powered by a 454 cu in (7.4 L) V8 producing 230 hp (172 kW) and 385 lb⋅ft (522 N⋅m). For 1991, a four-speed electronic automatic transmission (known as the 4L80E), 25 more horsepower, and even higher torque (405 lbs/ft at 2400 rpm) were added to the 454 SS. A total of 16,953 units were sold over the 4 years the 454 SS was in production.