The 1990 Chevrolet C/K 1500 truck is available with a regular cab or extended cab, which provides extra seating. The 1990 Chevy truck comes in two- or four-wheel drive and has either a six-and-a-half foot bed or an 8-foot bed. The standard transmission for nearly every trim is a four-speed automatic with overdrive. However, the 454 SS comes standard with a three-speed automatic transmission.
All trims come with a standard 4.3-liter, six-cylinder engine. However, the extended-cab trim has the option of the 6.2-liter diesel engine. The 454 SS comes standard with the larger, 7.4-liter engine. The 4.3 liter is a 160-horsepower engine that produces 235 foot-pounds of torque at 2,800 rpm. The bore for the 4.3 liter is 4.0 inches and the stroke is 3.48 inches. This engine has a compression ratio of 9.3:1. The 6.2-liter engine is an eight-cylinder, 240-horsepower engine.