Behold the very first shots of the 2020 Sierra Heavy Duty in the Double Cab body style. Caught undergoing testing by our eagle-eyed spy shooter, this marks the first time that we’ve seen an undisguised 2020 Sierra HD in Double Cab form, since GMC initially introduced the all-new Sierra HD exclusively in the Crew Cab body style.
The tester is a Sierra 2500HD (per the badges on the doors) in SLT trim level (per the badges on the tailgate) with the all-new 6.6L V8 gasoline engine under the hood (per the badges on the front fender/hood). Details on the new V8 engine are currently few and far between, since GMC announced the existence of the new engine but did not provide any other details like power, torque, configuration, layout, or any other details.
Seeing the Double Cab layout also confirms our suspicion about the location of the new BedStep: no matter the cab layout, it will always be placed at the fore-most portion of the bed.
As for the cab itself: the rear doors are notably smaller on the Double Cab than on the Crew Cab, and that’s the whole point. But the Double Cab still seems to be rather spacious in a way that it can seat four occupants comfortably.
No specifications or dimensional information about the all-new 2020 Sierra HD is currently available, as GMC will release it closer to the truck’s launch date.
About 2020 GMC Sierra HD
GMC’s 2020 Sierra HD is bigger and stronger than ever before. The all-new Heavy Duty truck, offered in three quarter ton 2500HD and one-ton 3500HD models, boasts greater trailering capability with advanced technologies designed to give customers a towing experience like never before.
Compared to the current Sierra HD, the all-new 2020 model features a longer wheelbase and an entirely new exterior design with a more dominant hood line and taller overall height. The bigger frame, stronger propulsion systems, and smarter technologies are expected to deliver a dramatically higher towing capacity than the outgoing model, well in excess of 30,000 pounds – according to GMC.
The 2020 Sierra HD demands attention thanks to a commanding, powerful design and visibly larger proportions. The bold appearance complements a more confident stance and embodies GMC’s focus on refinement, attention to detail, and advanced technologies. Apart from its size, the all-new 2020 Sierra HD can also be spotted by its prominent, new signature lighting in the form the C-shaped light blades that use bright LED technology to form the Daytime Running Lights (DRLs). LEDs are also used for all other lighting elements, including primary headlights, taillights, fog lights, and more.
The cabin offers best-in-class maximum headroom and legroom for both the driver and front-row passenger (on the Crew Cab model). A higher seating position adds to the truck’s overall taller profile to deliver a better view from behind the wheel. The interior features optimized ergonomics and an intuitive interactive experience with the vehicle’s updated technologies, such as the 15-inch diagonal head-up display (HUD) and the latest GMC touchscreen infotainment system. The HUD also offers useful trailering information such as vehicle speed, navigation, and an inclinometer. The available Rear Camera Mirror is a segment first. It is part of the 15 camera views, which deliver uncompromised visibility.
The 2020 Sierra HD will be powered by a choice of two engines: an all-new, gasoline engine that will serve as the standard/base powerplant. Details of this engine have not yet been announced.
The 6.6L V8 Duramax L5P turbo-diesel will remain the optional, up-level engine. It will be mated to an all-new 10-speed Allison automatic transmission (that’s not not entirely an Allison). The 6.6L V8 L5P engine delivers 445 horsepower and 910 pound-feet of torque. This powerful pairing performs at an even higher level due to increased cooling capacity made possible by improved air induction via the prominent hood scoop and larger front grille.
GMC will offer the 2020 Sierra HD in existing and new trim levels, including:
- Sierra HD base
Pricing information will become available closer to the date of production. We will keep you updated as more details roll in, so be sure to stay tuned to GM Authority for more GMC news, Sierra news, and Sierra HD news coverage.