• The 1990 Chevrolet C/K 1500 pickup came with a variety of trim options, including the extended or regular cab. The truck also offered a choice of a 6.5- or 8-foot bed. The 1990 Chevy 1500 had two available engine options---gas or diesel---and came in two- or four-wheel drive.
  
  

Regular Cab

• The regular cab came with two doors and seating for three adult passengers. The 1990 Chevrolet C/K 1500 regular cab with a 6.5-foot bed has a wheelbase measurement of 117.5 inches. The regular-cab trim has an overall length of 194.1 inches. The regular-cab trim with an 8-foot bed has a wheelbase measurement of 131.5 inches and an overall length of 212.9 inches. Each trim with a regular cab has a width of 76.4 inches and a standard height of 70.4 inches.
  
  

Extended Cab

• The 1990 Chevrolet 1500 with an extended cab comes standard with two doors with seating for up to six adult passengers. The extended-cab truck with a 6.5-foot bed has a total wheelbase of 141.5 inches, a length of 223.4 inches and a width of 76.4 inches. The extended cab with an 8-foot bed has an overall wheelbase measurement of 155.5 inches and a height of 70.5 inches. Each of the extended-cab trims has a width of 76.4 inches.
  
  

Engines and Transmission

• All Chevy 1500s produced in 1990, except the 454 SS, came standard with a 4.3-liter, V-6 engine, although a 6.2-liter V-8 diesel engine was an available option. The 4.3-liter engine produces 160 horsepower and 235 foot-lbs. of torque. This engine has a bore of 4 inches and a stroke of 3.48 inches. The 6.2-liter diesel produces 126 horsepower with 240 foot-lbs. of torque, a bore of 3.98 inches and a 3.82-inch stroke.
  
  The 454 SS has a 7.4-liter V-8 engine. This 230-horsepower engine produces 385 foot-lbs. of torque. It has a bore of 4.25 inches and a 4-inch stroke. A four-speed, automatic transmission with overdrive came standard on each trim.
  
  

Fuel Specs

• Both gas and diesel trucks have either a 25- or 34-gallon fuel tank, depending on the trim, according to MSN Autos. The 4.3-liter engine with four-wheel drive and a four-speed automatic transmission has a rating of 16 miles per gallon (mpg) in the city and 20 mpg on the highway. The two-wheel-drive trim has a rating of 17 mpg in the city and 22 mpg on the highway.
  
  The 6.2-liter engine with four-wheel drive and a four-speed automatic transmission gets 16 mpg in the city and 21 mpg on the highway. The two-wheel drive has a rating of 18 mpg in the city and 23 for highway. The 7.2-liter 1990 Chevy 1500 gets 10 mpg in the city and 11 mpg on the highway.