2011 GMC Sierra All Terrain HD Off-Road Concept
Updated July 21, 2026
GMC brought an off-road-ready heavy duty to the Detroit auto show: the Sierra All Terrain HD concept, a diesel answer to Ford’s Raptor that goes after towing and capability rather than pure desert speed.
The styling leans on an integrated front bumper and skid plate, cleanly blended together, with a grille that admittedly echoes the F-150 SVT Raptor. Under the hood is GM’s Duramax and Allison pairing: a 6.6-liter turbo diesel V8 backed by the Allison 1000 six-speed automatic.
Build highlights
- 6.6L Duramax turbo diesel V8, 397 HP and 765 ft-lbs of torque
- Allison 1000 six-speed automatic transmission
- Rated to tow 6.5 tons (13,000 lbs)
- 11% more fuel efficient and 63% fewer carbon emissions than the outgoing combo
- Crew cab with a 5-foot-8 short bed
- Integrated front bumper and skid plate
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Categorized in: Truck News
36 Comments
Nice post, that GMC truck in insane. It looks so much better than the squarer designs
wow ! this is so gorgeous. very handsome truck .. whew! thanks for the share
thanks for sharing a nice post
You have amazing review with regards to this GMC model. Thanks a lot for sharing this one here.
I certainly agree to the idea of this one. Glad to have run over on this amazing review.
I like the handling of GMC… just in the PC games…!
Very nice collection of image about the GMC model in different angles. This helps to have a look at all the sides of the truck.
Thanks for the infos that you shared. I really
appreciate its from now. Hope will get updated
from you. =)
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This new GM looks awesome! Probably doesn’t get the best gas mileage though…
Like the strong grille to match all that power under the hood. Great style for a GMC
Amazing truck!! Thank you for good pictures. GMC rocks.
The new model for 2012 GMC look very tough and can handle most of the obstacle off road. Is the size big like BMW X6, or Yukon Denali?
That is one bad truck, wonder if my wife will let me buy it.. Great post
Nice truck. I’m a big fan of GMC, good job on that new concept vehicle. Added it on my wish list, I always prefer trucks than regular cars. GMC rocks, toys for the big boys!
Raptor killer.
Absolutely stunning car. Would love to have one of those.
I love GMC truks. The 6.6 Liter turbo diesel V8 is amazing. I am thinking about buying one when I save enough money.
Susan
you cant handle this machine. it could drive right through your house.
Really nice design, it looks powerful.
Awesome in shape. Keep Updating post, I hang on this site.
The best design of GMC trucks. This site is so useful i glad to see this why don’t try to post about Life style
I have an older Chevy truck that’s still running strong, I will certainly consider a GM truck again, unless Hyundai decides to get into the truck market in the US
i have a 95 chevy 4×4 300 000 kilometers and its still running through deep snow.
A magnificent boys toy! i want one so bad! i have a pick up truck at present and is nothing compared to this 🙁
That is my kind of vehicle! Could throw the camping and fishing gear in easily and still have room for the wife…!
The Allison transmissions last forever. Combine that with the Duramax and you got a truck that will easily last you 20 years with good maintenance.
Wow this is awesome!! I hadn’t seen any pics of this model yet. Thanks for sharing!
This is good info about GM truck…very multipurpose and elegant truck. The truck also look really nice design and powerful…thank for sharing..
Old Gm was Good though this version has something cool like the new bumper and skid plate.and perhaps this one looks better. ;D
Nice info and images about this GMC truck. I think the new Duramax 6.6 liter V8 is the best truck engine that GM has ever come up with.
I could do without the “decided to copy Ford” grill….but it is definitely bada$$.
i like it Gmc for off road, thank brada for article, keep posting
I like the lower carbon emissions factoid for this truck. Most high-load pickups from days past had way too much exhaust emission into the environment. The fact that you can also get the equal, if not more, payload is a bonus for sure.
Beautifully design. it looks powerful. I love GMC V8 turbo diesel trucks.
I like GMC trucks. greate greate post.i`ll stay around