GMC Sierra All-Terrain HD concept should be production

GMC sales are up 28 percent from last year, and Sierra is the cornerstone of the GMC brand.

What do I think of this concept?

It looks like a production vehicle to me, and if it is not GMC is crazy. The diesel All-Terrain heavy duty is an enhanced version of the 2500 Sierra that could take on the Ford Raptor.

I just don’t like the name, all-terrain. Sounds almost civilized. Something like the GMC Hulk would be better. Hulk, like Bulk, because this truck makes the Sierra HD look gentrified.

It’s got everything on it – lockable side storage, frame-mounted recovery hooks, composite bed liner, 360 flood light. The concept beats out Ford by offering motorized illuminated assist steps. Carl Zipfel, GMC’s Chief designer gave the concept a bigger  grille, larger hood and bulky quarter panels. It’s got greater ground clearance and greater off-road capability.

GMC says the concept will have an estimated conventional towing capacity of 13,000 pounds and an estimated fifth-wheel towing capacity of 15,600 pounds. It is powered by a 6.6-liter Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission powertrain combination.  That is the same Duramax that is in the Sierra HD already.  The Duramax is rated at 397 horsepower and an astounding 765 foot-pounds of torque.

2011_gmc_concept_side GMC Sierra All-Terrain HD concept should be production 2011 Detroit auto show (NAIAS) Automobiles and Energy Car designers Car shows Concept cars GM GMC Manufacturers

GMC SIERRA ALL TERRAIN HD CONCEPT SPECIFICATIONS

Vehicle: GMC All Terrain HD concept
Body style / driveline: 5-passenger crew cab, 3/4-ton 4-wheel-drive heavy-duty pickup
Construction: body on frame
Engine: Duramax 6.6L turbo-diesel
Horsepower / kW @ rpm: 397 / 296 @ 3000
Torque (lb.-ft/ / Nm) @ rpm: 765 / 1037 @ 1600
Transmission: Allison 1000 six-speed automatic
Suspension (front): long- and short-arm independent with torsion bars
Suspension (rear): semi-elliptic two-stage multi-leaf spring
Steering type: integral power-assisted recirculating ball
Brakes (type): power-assisted, Hydroboost brake-apply system, four-wheel disc, four-wheel ABS
Brake rotor diameter x thickness  (in / mm): front: 13.97 x 1.57 / 355 x 40 

rear: 14.17 x 1.34 / 360 x 34

Wheel size and type: 20 x 9.5-inch aluminum
Tire type and size: BFGoodrich KM2 325/60R20
Wheelbase (in / mm): 148.6 / 3774
Overall length (in / mm): 230.9 / 5864
Overall width (in / mm): 83 / 2106
Overall height (in / mm): 81.8 / 2077
Track “ front (in / mm): 73 / 1853
Track “ rear (in / mm): 73 / 1853
Minimum ground clearance “ (in / mm): 21.1 / 536 (at rocker panels); 11.8 / 300 (at skid plates)
Approach angle “ front (deg.): 39
Approach angle “ rear (deg.): 31
Maximum payload (lbs. / kg): 2700 / 1225 (est.)
Maximum towing capacity “ ball hitch (lbs. “ kg): 13,000 / 5896 (est.)
Maximum towing capacity “ fifth-wheel hitch (lbs. “ kg): 15,600 / 7076 (est.)

Note: Information shown is current at time of publication.

About the Author:

Lou Ann Hammond is the CEO of Carlist and Driving the Nation. She is the co-host of Real Wheels Washington Post carchat every Friday morning and is the Automotive, energy correspondent for The John Batchelor Show and a Contributor to Automotive Electronics magazine headquartered in Korea. Hammond is a member of the North American Car and Truck of the Year (NACTOY), Women's World Car of the Year (WWCOTY), and the Concept Car of the Year.

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