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The 1999 Current-Generation Sierra 3500 is a 2-door, up to 6-passenger full size pickup, available in 4 trims, ranging from the Regular Cab 2WD to the Extended Cab 4WD. The 1999 Current-Generation Sierra 3500's closest competitors include the Chevrolet C/K 3500, the Ford F350 SD DRW Crew Cab LWB, and the Ford F350 SD SRW Crew Cab SWB.
Upon introduction, both trims are equipped with a standard 5.7-liter, V8, 255-horsepower engine. A 5-speed manual transmission with overdrive is standard, and a 4-speed automatic transmission with overdrive is optional.