The Denali XT has a unibody architecture and is rear-wheel drive but falls into the Sport-Utility Truck (SUT) category, meaning it straddles the lines between a traditional SUV and pickup truck. Think a flatter, more nimble Honda Ridgeline or Explorer Sport Trac. Denali XT's new, more efficient 4.9L version of GM's small-block V-8 features fuel-saving technologies such as direct-injection technology and Active Fuel Management.The new engine is matched with GM's unique two-mode hybrid propulsion system, giving the SUT good overall fuel economy, which includes an all-electric drive at low speeds. With its unibody structure, the Denali XT is lighter than conventional body-on-frame trucks, with better ride-and-handling characteristics. Likewise, the Denali XT is filled with technologies and features that maximize its flexibility, including a cargo space-enhancing Midgate(r) and height-adjustable suspension. The Denali XT's proportions are framed around a high cowl and 123.4-inch (3,134 mm) wheelbase.