GMC Pickup S15 Specs

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The GMC S-15 pickup, which was the GMC version of the Chevrolet S-10, was available from 1982 to 1990. In 1991, GMC replaced the S-15 with the Sonoma.

Models and dimensions

The GMC S-15 was available with a regular or extended cab. In the regular cab models, a short bed and a long bed were available. All models had a height of 61.3 inches and a width of 64.8 inches. The regular-cab, short-bed S-15s had a wheel base of 108.3 inches and an overall length of 178.2 inches. Regular-cab, long-bed models had a wheel base of 117.9 inches and an overall length of 194.2 inches. The wheel base of extended cab models was 122.9 inches and overall length was 192.8 inches.


The 1990 GMC S-15 pickup came with a standard 2.5-liter, 4-cylinder engine, which had a horsepower of 94 at 4400 RPM and a torque of 130 at 3200 RPM. The other engine option was a 4.3-liter, V6 engine that had horsepower of 160 at 4400 RPM and a torque of 230 at 3200 RPM.

Transmissions and drivetrains

The 1990 GMC S-15 pickup was available with a standard manual, 5-speed transmission and an optional automatic, 4-speed transmission. The pickup was available with two- or four-wheel drive drivetrains.

Fuel economy

The GMC S-15 pickup got between 15 and 21 miles per gallon in the city and between 19 and 25 miles per gallon on the highway. The most fuel-efficient model was the the two-wheel drive, manual transmission model with the 2.5-liter, 4-cylinder engine.

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