The GMC Sprint is a coupe utility/pickup that was produced by GMC for the 1971–1977 model years. The Sprint was renamed Caballero for the 1978 model year, and produced through 1987. The rear-wheel-drive car-based pickups were sold by GMC Truck dealers primarily in the United States and Canada as the GMC version of the Chevrolet El Camino. Trim designations, emblems, and wheel trim differentiate the GMC from the Chevrolet. The vehicles were built on the GM A platform through 1981; for 1982, it was re-designated the G platform as the A platform switched to front-wheel drive.
Sprint
Second generation (MY 1973–1977)
For 1973, all GM A-body vehicles were redesigned. It was the largest generation of the Sprint, but thanks to lighter construction, it weighed less than the previous generation. Engine offerings during this period included a 250 cubic-inch inline six, as well as a variety of V8s, including the 305, 350 and 400 cubic-inch versions of the Chevy small-block V8, plus the 454 Turbo-Jet big block through 1975. GMC carried over the "Standard" and "Custom" Sprint designations. The inline six was still only available on the "Standard". Catalytic converters were added to all engines beginning with the 1975 model. Other than annual grill revisions and a switch to quad-stacked, rectangular headlights in 1976, the Sprint remained relatively unchanged through 1977, when the "Sprint" name was replaced with "Caballero" for 1978.
Sprint SP
The Chevelle SS was dropped after 1973, but the El Camino was one of the few Chevrolet models to retain an SS package. Following suit, GMC continued to offer the Sprint with an SP package, though it was still only available on the Sprint Custom. It no longer included the two fat hood stripes, and the 454 Turbo-Jet big block V8 was discontinued after 1975.
Source: Wikipedia
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