For 2000, the GMC Sierra has some significant updates. Topping the list is the availability of a four-door extended cab. New options include fender guards for 4x4 models, soft tonneau cover, a new automatic dimming mirror with a built-in compass and exterior thermometer.There's also more power: Horsepower and torque ratings are increased for the 4.8-liter V8 and 5.3-liter V8 engines; and trailer towing ratings have been revised upward. The 2000 GMC Sierra is built on a frame that is the stiffest and lightest truck frame General Motors has ever built. The frame rails are hydroformed, a process that uses high-pressure hydraulics to shape steel. Tubular crossmembers and roll-formed mid-rails increase rigidity further. This stiff structure enhances handling and ride quality immensely, while improving crashworthiness. Three V8 engines are available, in 4.8-, 5.3- and 6.0-liter displacements, from 270 to 300 horsepower. All three are based on the new GM small-block V8. A 4.3-liter V6 is still available and comes with a number of improvements, but the V8s will be sold in much higher volumes. A 5-speed manual gearbox is standard in the base truck. More popular are the 4L60 and 4L65 4-speed automatics, which feature a new delayed-upshift feature for towing. The aluminum short- and long-arm front suspension uses coil springs on 2-wheel-drive models and torsion bars on 4-wheel-drive models. Brakes are large, heavy-duty discs on all four corners; ABS is standard on all models. The GMC Sierra ranges from $16,640 for a two-wheel-drive regular cab base-trim V6 model to about $30,616 for a four-wheel-drive three-door extended cab SLT with a 6-liter V8. All offer a smooth, quiet ride and quality feel.
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