The best bet on GMC Sierra is its first-class hauling and towing capabilities.

With its standard 143-inch wheelbase and optional Quadrasteer four-wheel steering and heavy-duty brakes, make supremely stable tow vehicles, with towing capacities up to 9,000 pounds. The 1500HD Crew Cab, can tow up to 10,200 pounds.

Yet all Sierras deliver a smooth, comfortable ride among the full-size pickups.

For 2006, several new packages, trims and configurations are available — most notably a new base-model 1500 SL Crew Cab. Also, the optional 6.6-liter turbo-diesel V-8 on Sierra 2500HD and 3500 models gets more power and a new six-speed-automatic transmission replaces the previous five-speed in models equipped with this engine.


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