MPG estimates on this website are EPA estimates; your actual mileage may vary. For used vehicles, MPG estimates are EPA estimates for the vehicle when it was new. The EPA periodically modifies its MPG calculation methodology; all MPG estimates are based on the methodology in effect when the vehicles were new (please see the Fuel Economy portion of the EPAs website for details, including a MPG recalculation tool).
The features and options listed are for the new 2023 GMC Sierra 3500HD and may not apply to this specific vehicle.
Price(s) include(s) all costs to be paid by a consumer, except for licensing costs, registration fees, and taxes. Not available with special finance, lease and some other offers.