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Staff member Lead Administrator
· posted in GMC Sierra Forum
Filed under: Concept Cars, Detroit Auto Show, Truck, GM, GMC, Off-Road
GMC Sierra All Terrain HD concept - Click above for high-res image gallery

If you think the Ford F-150 SVT Raptor is too hot yet the Dodge Ram Power Wagon is too cold, General Motors' latest concept might strike you as "just right." This, the GMC Sierra All Terrain HD concept, looks to bridge the gap between the two hardcore pickups from GM's crosstown rivals, while still offering top-notch levels of power, refinement and technology.

The four-door 2011 Sierra HD underpins the All Terrain concept, and power comes from The General's 6.6-liter Duramax diesel V8. A six-speed automatic sends the 397 horsepower and 765 pound-feet of torque to all four wheels. Versus a normal Sierra HD, ground clearance has been increased by about three inches, width has been bumped up to 73 inches (four more than normal) and the whole package rides on 20-inch aluminum wheels wrapped in 35-inch BFGoodrich KM2 mud terrain tires. Off-road performance is enhanced with the addition of Fox off-road shocks (just like the Ford Raptor).

Inside, GM has fitted the All Terrain concept with a Denali-spec interior with additional satin metal finishes and a leather-wrapped dash. What's more, a next-generation stereo system with an 80-gigabyte hard drive has been fitted inside this concept, and we'll soon be seeing this new system across the full GM product range.

Currently, there are no plans to create a production version of the All Terrain concept, though GM tells us that if a road-ready version of this ultra-tough Sierra is produced, it will likely be crafted with the assistance of an aftermarket company. We'll be seeing the All Terrain concept in person at the Detroit Auto Show in just a few weeks, but for now, click through our high-res image gallery below, or follow the jump for the official release.


Gallery: GMC Sierra HD Concept


[Source: General Motors]Continue reading Detroit Preview: GMC Sierra All Terrain HD concept is ready for off-road action
Detroit Preview: GMC Sierra All Terrain HD concept is ready for off-road action originally appeared on Autoblog on Thu, 16 Dec 2010 17:56:00 EST. Please see our terms for use of feeds.


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B
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Hello. 5 years old without any problems. Now the radio changes channel when ever it wants to. Getting very annoying. Any ideas what to do with it ?
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TERRY GARBIG
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Last reply · posted in GMC Vandura Forum
I have a 1991 2500 Vandura conversion van(Glaval) and I'm trying to find the Engine Control Module(ECM). Anyone have any ideas?
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Check under the drivers seat
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I have a 1991 2500 Vandura conversion van(Glaval) and I'm trying to find the Engine Control Module(ECM). Anyone have any ideas?
06/18/2026
How did all that work out?
I'm wondering about your preferred PSI for tires.
My mechanic recommended 32 psi for my heavily-loaded 1990 Vandura.
That's what I've used for years (once it was around 36-38, and that felt like I was on rollerblades and could not sense the road . . . ), yet I see videos saying that 32 is way too low and damages tires . . .

(I got 11-12 years out of my tires at 32 psi.)

Thank you for any helpful feedback!
Mark Staffanou
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