Specifications of 1988 GMC Trucks

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The 1988 GMC Sierra truck has several available trim options. For instance, it is available as a 1500, 2500 and 3500 with a regular or extended cab, a 6 1/2-foot bed or an 8-foot bed, two- or four-wheel drive and a gas or diesel engine.

Sierra C/K 1500 Specs

  • The 1988 GMC Sierra C/K 1500 base trim has a regular cab and a 6-1/2 foot bed. It comes standard with a 4.3-liter, V6 engine. It produces 160 horsepower with 235 ft.-lbs. of torque. The bore is 4.0 inches, and the stroke is 3.48 inches with a 9.3:1 compression ratio. The GMC C/K 1500 has a wheelbase of 117.50 inches and a length of 194.10 inches. The width for this trim is 76.40 inches with a height of 70.40 inches. The curb weight is 3,655 lbs.

Sierra C/K 2500 Specs

  • The base trim for the 1988 GMC Sierra C/K 2500 has a regular cab and an 8-foot bed. The standard engine is a 4.3-liter V6 with the same specification as the C/K 1500. The wheelbase measures 131.50 inches in length on the C/K 2500. It has an overall length of 212.90 inches, a width of 76.40 inches and a height of 73.0 inches with a curb weight of 3,933 lbs.

Sierra C/K 3500 Specs

  • The 1988 GMC Sierra C/K 3500 base trim comes with a regular cab. It has a 5.7-liter V8 engine. This engine produces 185 horsepower and 285 ft.-lbs. of torque. The bore is 4.0 inches, and the stroke is 3.48 inches. It has a compression ratio of 8.6:1. The C/K 3500 has a wheelbase of 131.50 inches. The length is 212.90 inches, the width is 76.40 inches, and the height is 75.50 inches. The curb weight is 4,293 lbs.

Interior

  • The 1988 GMC 1500, 2500 and 3500 have the same interior dimensions on the base models. The available headroom is 40.0 inches, the legroom measures 41.80 inches, the shoulder room is 50.00 inches, and the hip room is 60.50 inches.

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