SL 6.5' Box 2WD shown
The 1999 All-New Sierra 2500 Extended Cab is a 3-door, up to 6-passenger full size pickup, available in 8... read more trims, ranging from the SL 6.5' Box 2WD to the SLE 8' Box 4WD. The 1999 All-New Sierra 2500 Extended Cab's closest competitors include the Chevrolet C/K 2500, the Dodge Ram Club Cab 4X4, and the Ford F250 SD SuperCab SWB.
Upon introduction, the SL 6.5' Box 2WD is equipped with a standard 5.3-liter, V8, 270-horsepower engine that achieves 15-mpg in the city and 19-mpg on the highway. A 4-speed automatic transmission with overdrive is standard. The SLE 8' Box 4WD is equipped with a standard 6.0-liter, V8, 300-horsepower engine. A 5-speed manual transmission with overdrive is standard, and a 4-speed automatic transmission with overdrive is optional.
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Trims are variations of a vehicle model produced by the manufacturer. Differences between trims vary greatly between models but may include:
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