first-ever-sierra-hd-at4x-2

1Sierra HD AT4X’s 18,500-lb max rating requires available 6.6L Diesel engine and conventional towing. Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.2Class is gasoline and diesel heavy duty pickups in the GM Large Pickup segment. Based on latest competitive data available.

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