Thinking about purchasing a new car? Use our new Car Loan Calculator to estimate your monthly car payment!

The Specifications for the 1989 GMC Sierra

by Justan Brandt

The 1989 GMC Sierra shares many components with Chevrolet pickups of the same era. There are three trims available: the 1500, 2500 and 3500. The model designations have either a "C" or "K" in front of them, which represent the truck's drivetrain. Rear-wheel drive trucks are denoted with a "C," and four-wheel drive models are represented with a "K."

1989 GMC Sierra C/K 1500

The 1989 GMC Sierra C/K 1500 is the smallest of the Sierras. This model is available with either a 6.5-foot or 8-foot bed. Power is generated from a V-6 or diesel V-8 engine. The 4.3-liter V-6 is rated at 160 horsepower and 235 foot-pounds of torque. The 6.2-liter V-8 produces a maximum of 126 horsepower and 240 foot-pounds of torque. The only available transmission is a four-speed automatic with overdrive. The C/K 1500 comes in two cabin types: regular and extended. The curb weight varies between 3,692 and 4,912 pounds, depending on the Sierra's options, engine and trim.

1989 GMC Sierra C/K 2500

The 1989 Sierra C/K 2500 is designed for medium-duty use and provides a greater payload and towing capacity than the 1500 series. Powering the Sierra 2500 is the same engine found in the 1500, either a 126-horsepower diesel V-8 or a 160-horsepower V-6. The Sierra C/K 2500 is also available in regular and extended cab versions. The truck's curb weight starts at 3,909 pounds and maxes out at 4,942 pounds, depending on options.

1989 GMC Sierra C/K 3500

For heavy-duty use, there is the 1989 GMC Sierra C/K 3500. Offering the largest payload and towing capacities in the 1989 Sierra lineup, power is supplied by one of two V-8 engines. The first is a 6.2-liter V-8 diesel that produces 143 horsepower and 257 foot-pounds of torque. The second is a 7.4-liter V-8 generating 230 horsepower and 385 foot-pounds of torque. Available with an 8-foot bed, the Sierra 3500 has a curb weight ranging between 4,349 and 5,255 pounds.

Model Designations

The 1500 marquee represents a 1/2-ton pickup truck, the 2500 is a 3/4-ton truck and the 3500 represents a 1-ton truck. The weights do not refer to the trucks themselves but the maximum payload ratings. The 1/2-, 3/4- and 1-ton designations are an outdated system that continue to be used by the industry to help define a truck's purpose.

About the Author

Justan Brandt became a journalist and writer who specializes in automotive coverage in 2009. He has been a student at Bob Bondurant’s School of High Performance Driving and holds a Bachelor of Science degree in technology commerce.

More Articles

Photo Credits

  • station-service_1 image by Pugstudio from Fotolia.com