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 2020Â 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 HDÂ base
- SLE
- SLT
- AT4
- Denali
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.Â
Comments
We want details on the 6.6 Gasser! But in honesty it looks really good.
401 HP and 464 lb-ft of torque.
Cast iron block.
Direct injection and VVT.
Per Chevrolet’s website.
Im curious to see at what rpm’s that 464 ft/lb torque is at. I bet its really low with a 6.6 and direct injection. The 6.0 was putting out 90% power at 2,000 rpm. I bet the new engine has 400 whenever get on the throttle.
Also max tow rating of 35,500 lbs and max payload of 7,466 pounds.
Per TFL truck and Autoblog.
Is it going to be a 6.6 or is it a 6.2?
6.6, its already been announced by GM
Did GM actually confirm that? For the first few months i never heard anything about a 6.6 V8 any where except on this sight. I wasnt aware GM said anything about it. Im all for it though.
Look on Chevrolets website, its been updated with information on the 6.6L V8.
401 HP and 464 lb-ft of torque.
Is it just me or does the double cab look better proportionally than the crew cab.
No, its not just you.
It looks much better than the crew cab, in my opinion, not to mention a little smaller which would fit my needs.
I’m wondering if you could choose which side mirrors as I like the regular mirrors that the 1/2 tons use.
is this the 6.2 from the 1500’s?
I really cannot see any engine with AFM or DFM or whatever its called being nearly as reliable as the 6.0.
No, its the new 6.6L.
I cant make out a 6. I can make out a 2, oh how I hope it is the 8.2 coming back with direct injection, atkison action and DSF
No, it shows 6.6 just like GM has already announced.
The new 3500 HD badging (that’s what it actually says) is very bad stylistically. It’s crunched down so hard the 3 and the 5 just look like chrome rectangles, and that’s all anyone will see from even a short distance. GM should definitely stretch the lettering vertically to make it easier to read and better looking.
Notice the hood scoops? Ram air 6.6?
I was read one hour ago saw 6.2 gas but few min ago again reading no there 6.2 look like remove 6.2 to 6.6 gas. I guess mess up write gmauthority???
How’s come a double cab still only has one cab? 😉
Maybe GMC just stuck the badge insert off a 6.2L 1500 on that 2500 to keep everyone guessing.
It says 6.6, you can make it out.
I really like the look of the double cab GMC. I’m looking forward to seeing it up close this fall.
I’d be interested in the Duramax 🙂