1990-1998 GMC Sierra: Overview

Vehicle Highlights

GMC's Sierra and the nearly identical Chevrolet C/Ks had been redone as early 1988 models, in three series: 1500 (1/2 ton), 2500 (3/4 ton), and 3500 (1-ton). C pickups were 2-wheel drive; K indicated Insta-Trac part-time 4WD. Models without flared rear fenders were called Wideside, models with flared rear fenders Sportside. The short-bed had a 117.5-inch wheelbase and 6.5-foot bed. Long-bed trucks rode a 131.5-inch wheelbase with 8-foot bed. Extended-cab models had a 141.5-inch wheelbase with 6.5-foot bed, or a 155.5-inch wheelbase with 8-foot bed.The 6-passenger extended-cab (2500 only) had two full-width bench seats. A folding bench was available in other extended-cabs. Others got a 3-place bench seat or two buckets. Base engine was a 4.3-liter V6, making 160 horsepower. Options included 5.0- and 5.7-liter gasoline V8s, and a 6.2-liter diesel. All models had antilock rear brakes, and either manual shift or an automatic transmission.