Motormax 1:27 2019 GMC Sierra 1500 Denali Crew Cab, Blue

The Chevrolet Silverado, and its mechanically identical counterpart the GMC Sierra, are a series of full-size and heavy-duty pickup trucks manufactured by General Motors and introduced in 1998 as the successor to the long-running Chevrolet C/K line. The Silverado name was taken from a trim level previously used on its predecessor, the Chevrolet C/K pickup truck from 1975 through 1998. General Motors continues to offer a GMC-badged variant of the Chevrolet full-size pickup under the GMC Sierra name, first used in 1987 for its variant of the GMT400 platform trucks.

The heavy-duty trucks are referred to as "Silverado HD" and "Sierra HD", and as the Chevrolet Cheyenne in Mexico. Perennially one of the best-selling vehicles in the United States, almost 12 million Silverados have been sold since its introduction.

In 2016, GMC introduced the Sierra All Terrain X, which is equipped with a 5.3-liter V8 engine with performance exhaust, bumping output up from 355 to 365 horsepower. On the exterior, the Sierra All Terrain X features back 18 inch rims fitted with Goodyear Wrangler DuraTrac MT tires, black bed-mounted sport bar, LED off-road lights, and blacked-out accents.

After introducing the Sierra 1500 All Terrain X full-size pickup and the Canyon All Terrain X small pickup, in 2017 GMC extended the same formula to its heavy-duty pickup family with the Sierra HD All Terrain X.

Available on four-wheel drive Sierra 2500 HD crew cab models in either Black Onyx or Summit White exterior colors, the Sierra HD All Terrain X package provides a unique, premium mix of specialized exterior trim and off-road special equipment, uniquely paired with GMC's high-level of refinement and technologies.

All Terrain X's customized appearance starts with a unique body-color grille surround, which flanks a distinctive grille insert that's unique to All Terrain. Body color door handles, front and rear bumpers, and bodyside moldings provide a distinctive monochromatic appearance, while black accents, including belt moldings, front bumper skid plate, and B-pillar accents, enhance its bold attitude.

Sierra HD All Terrain X models also include unique eighteen-inch black-painted aluminum wheels – fitted with rugged LT275/65R18 Goodyear Duratrac MT-rated tires – along with four-inch black sport side steps, black heated and power-folding trailering mirrors with integrated turn signals and LED guidance lamps, a spray-on bedliner, and a distinctive black bed-mounted sport bar, which is designed to support available GMC Accessories LED off-road driving lamps.

Inside, the 2017 Sierra 2500 HD All Terrain X also features GMC IntelliLink with an 8-inch-diagonal color touchscreen, Teen Driver, remote-locking tailgate, remote starting system, Rear Vision Camera, adjustable pedals, leather-appointed seats, heated front seats and wireless mobile device charging.

Sierra HD All Terrain X's strong, bold appearance is matched by equally strong engineering underneath its surface. A 6.0-liter gasoline engine is standard, but the all-new, next-generation 6.6-liter Duramax Diesel turbo-diesel V-8 is also available. More powerful and refined than ever before, this latest Duramax Diesel delivers 445 hp and 910 lb-ft of torque – providing plenty of power to trailer with confidence.

For added confidence off-road, the Sierra HD All Terrain X also includes the Z71 off-road suspension package, which adds front underbody and transfer case skid plates, twin-tube Rancho shocks, hill descent control, and off-road information graphics in the Driver Information Center. An Eaton automatically-locking rear differential (4.10:1) is also standard equipment.