2011 GMC Sierra Hybrid

 Compromise is a part of life, but not in the 2011 GMC Sierra Hybrid. This powerful, full-size pickup achieves 33-percent greater city fuel economy and a 23.5-percent improvement in overall fuel economy over non-hybrid models, while delivering GMC’s legendary capability – including a 6,100-pound (2,767 kg) towing capacity.

Estimated fuel economy for both 2WD and 4WD models is 20 mpg in the city and 23 on the highway. With the 26-gallon (98 L) fuel tank, Sierra Hybrid delivers a cruising range of more than 500 miles. The truck’s impressive efficiency is due to General Motors’ patented two-mode hybrid system and a powerful 6.0L gas V-8. It offers all-electric driving up to 30 mph (48 km/h), a design that saves fuel even when the truck is fully loaded or towing a trailer.

 The Sierra Hybrid is offered in the Crew Cab body style on both 2WD and 4WD models. Each model is equipped with several standard, popular features, including StabiliTrak electronic stability control system, a locking rear axle and a trailering package. Sierra Hybrid also offers dual-stage frontal air bags and head curtain side air bags.

For 2011, the Sierra Hybrid includes a new Gray Green Metallic exterior color, OnStar 9.0 and enhancements that reduce wind noise.

 Hybrid details

 The Sierra Hybrid’s fuel-saving performance is derived from GM’s advanced Electrically Variable Transmission (EVT) and 300-volt nickel-metal hydride Energy Storage System (ESS), which work with the standard 6.0L V-8 gasoline engine with Active Fuel Management (AFM) and late intake valve closing (LIVC) technology. GM’s hybrid system not only enables the Sierra to launch and drive up to 30 mph on electricity alone, it allows the Vortec 6.0L V-8 engine to operate in its more economical V-4 mode for longer periods.

 As part of the vehicle’s emission control system, the ESS is warranted for eight years/100,000 miles.

 In the Sierra Hybrid, the hybrid system itself generates the electricity used to propel the vehicle. When the brakes are applied or the vehicle is coasting, the electric motors within the hybrid system create electricity that is stored in the 300-volt battery. This stored energy moves the vehicle and the regenerative braking cycle is renewed.

First introduced on the 2008 GMC Yukon Hybrid, the two-mode hybrid system provides seamless, dependable power on demand in an efficient package. In fact, its electric motor is about half the size of those in single-mode hybrid systems. This technology was developed for and is still used in hybrid transit buses in more than 70 North American and European cities. Scaled down for use in passenger vehicles, the two-mode system delivers fuel savings where it is needed most – in large vehicles with high levels of capability. The two-mode hybrid system is a core part of GM’s energy diversity efforts, centered on reducing dependence on petroleum, improving fuel economy, reducing emissions and minimizing the automobile’s impact on the environment.

 Quiet and smooth

 Integration of the hybrid system on the Sierra is seamless – the battery pack is beneath the rear seat – and delivers a quiet driving experience. Contributors to this include:

• New exhaust system and resonator tuned for the 6.0L engine’s Active Fuel Management operation
• Additional engine intake induction tuning for reduced interior noise and pleasing sound quality
• Low-rolling resistance, “quiet-tuned” P265/65R18 tires for reduced road noise
• Electrically driven, 300-volt air conditioning compressor reduces vibration and allows the standard, tri-zone HVAC system to cool the passenger compartment even when the gasoline engine is shut off
• Electrically driven, 42-volt variable-assist power steering reduces vibration and provides up to a 0.5-mpg fuel economy improvement by reducing parasitic losses common in belt-driven hydraulic systems
• Energy Storage System (ESS) cooling system internal fan is tuned to be quiet at low vehicle speeds.

 Along with quietness, the Sierra Hybrid also delivers exceptional driving smoothness, thanks to specifically tuned shocks for its Z85 suspension and a hydraulic body mount. Located on the passenger side of the chassis, the hydraulic mount provides a dramatic improvement in highway driving smoothness, particularly on rough or choppy road surfaces.

Trailering performance

In addition to increased fuel economy, the Sierra Hybrid’s electrically variable transmission also provides tremendous trailering capability, enhancing driving smoothness and quality when towing. Towing capacity is 6,100 pounds (2,767 kg) with 2WD models and 5,900 pounds (2,676 kg) with 4WD models.

Electric drive is enabled up to approximately 30 mph (48 km/h), saving fuel even when the truck is towing a trailer.

The EVT incorporates tap up/tap down shift control. It benefits towing on curves or lower-speed back roads, as exceptionally smooth gear transitions eliminate the “shift shock” torque disruption that can occur during abrupt shifts, such as when slowing or braking.

 In addition to the eight-year/100,000-mile warranty on the Sierra Hybrid’s Energy Storage System, GM's five-year/100,000-mile Powertrain Limited Warranty continues to make GMC a better choice for customers. Coverage focuses on the complete ownership experience and includes other provisions that competitors do not offer, including transferability to the next owner, more complete coverage of parts, and coverage for new and certified used vehicles. In addition, GMC offers free courtesy transportation and roadside assistance.

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2010 GMC Granite Concept

Combining a decidedly urban-industrial design aesthetic with functionality aimed at young professionals, the GMC Granite Concept takes the brand's trademark capability in a new, more progressive direction. It was introduced at the 2010 North American International Auto Show in Detroit.
If brought to market, the GMC Granite Concept would be the smallest GMC ever - but has been optimized to feel much larger. Its length is a full 2 feet (0.6 m) shorter than the new Terrain compact crossover, but its open interior was designed to be spacious and flexible to fit the needs of active people. Generous cargo space and unique flipping/folding seats, for example, enable a mountain bike to be loaded completely inside with the tailgate closed.

"GMC Granite Concept was conceived as a new type of vehicle from GMC - one that could stretch people's ideas of what a GMC can be," said Lisa Hutchinson, product marketing director for GMC. "We call it an 'urban utility vehicle' and our goal was redefining what the GMC name could mean to a new generation of customers looking for both bold design and functionality."

Like GMC's current lineup of trucks, SUVs and crossovers, the GMC Granite Concept delivers style and capability, with advanced features, high-quality materials and exceptional attention to detail. An industrial-influenced exterior is combined with a spacious interior that features precise instruments and leading-edge technology. The climate system, navigation and infotainment technologies, for example, are viewed via an extra-wide, next-generation organic light-emitting diode technology that is more dynamic than the conventional screens used in most production vehicles.

"We think of the GMC Granite Concept as the automotive equivalent of an urban loft apartment," said Dave Lyon, executive director of North American Interior and Global Cross-Brand Design. "The exterior has an unmistakable industrial look, but the interior is warm and personalized."

Power for the GMC Granite Concept comes from a 1.4L turbocharged engine that is part of GM's new family of small-displacement, highly efficient four-cylinder engines. It is matched with a six-speed transmission.

Industrial-inspired exterior
A cadre of young designers drew upon the preferences of young, urban professionals like themselves, who are very social and active. They are more likely to take friends to clubs and load outdoor gear on weekend excursions than to haul lumber or tow a boat. With those requirements in mind, they sketched out the dimensions of the GMC Granite Concept accordingly. Its 103.6-inch (2,631 mm) wheelbase is comparable to a Chevrolet Cobalt, but its 161.3-inch (4,097 mm) overall length is more than a foot shorter. Its size gives the GMC Granite Concept exceptional maneuverability, even within narrow urban streets.
The GMC Granite Concept's comparatively short body length is complemented by a wide, 70.3-inch (1,786 mm) overall width and a tall, 60.5-inch (1,536 mm) height. Those dimensions create unique proportions that depart dramatically from conventional minivan, SUV or crossover designs. "The Design team leveraged the best attributes from different segments: SUV, minivan and crossover, and mixed them with a commercial chic aesthetic. We feel this redefines the premium class of vehicles we call urban utility vehicles," said Lyon.
GMC Granite Concept has four doors, hinged on each side to open like a set of French doors. There's no pillar between the front and rear doors, making the GMC Granite Concept easier to enter, exit and load, even with bulky items.

"We gave the GMC Granite Concept a bold yet appealing design that truly makes a styling statement," said Juho Suh, exterior design manager. "For a new generation of urban professionals, it delivers the look and functionality they need."
In keeping with the vehicle's urban theme, the exterior of the GMC Granite Concept has a series of complex, intersecting planes and angles, creating the impression of an industrial machine - an object created out of necessity, but admired for its precision and functional aesthetics.
A forward-angling motif that cuts through the door panels, starting high and behind the doors and cutting to the center of the front door, suggests motion, as does a high beltline and tapered side glass. A rear spoiler is integrated into the roof and extends slightly above the rear glass. Other angles and planes of the exterior appear carefully metal-crafted.

Up front, GMC's signature grille design is flanked by headlamps that sweep back into the fenders, further suggesting motion. The headlamps and fog lamps are set at the far edges of the front-end bodywork, accentuating the GMC Granite Concept's planted stance. At the rear, the vehicle's planes and angles come together tightly, showing careful attention to detail. Other exterior elements include prominent taillamps with a multi-layer appearance and LED lighting technology; and a centered exhaust outlet with a brushed metal tip.
There is no chrome on the exterior of the GMC Granite Concept; all the trim has a satin or brushed metal finish, accenting the industrial look. Large, 20-inch wheels - wrapped in Bridgestone tires - were tailored within the fenders for a low, sporty stance. The exterior color of the GMC Granite Concept is metallic gray that evokes the look of the material for which this concept was named.

Mechanically minded, highly functional interior
The interior was inspired by the design of aircraft-type mechanical instruments and precision tools. That is most apparent on the dashboard and instrument cluster, where gauges were modeled after finely crafted timepieces. A compass incorporated into the "barrel" surrounding the speedometer moves with every turn of the vehicle, providing an at-a-glance directional confirmation. "Our goal was not to hide but to show how this vehicle is put together, and the high quality of its craftsmanship, not unlike the finest industrial-inspired luxury time pieces," said Lyon.
Red backlighting illuminates the gauges, while a panel of organic light-emitting diode screens is the foundation for the vehicle's navigation, infotainment, phone and climate control readouts. The screens represent the next generation in vehicle information displays, with bright, multidimensional readouts and intuitive controls that give the GMC Granite Concept a modern feel.
Integrated within GMC Granite Concept are unmistakable GMC cues, including a center stack wing motif similar to that of the new GMC Terrain. A prominent center console runs between the front and rear seats, with ports to plug in popular portable electronic devices, as well as storage compartments large enough for a laptop computer.

The center console also houses a unique transmission shifter. Rather than a handle that actuates within a conventional gate, it is a simple, space-saving knob that rotates with the precise clicks of a torque wrench. The gear selections are confirmed via LED indicators.
Among the most functional elements of the GMC Granite Concept are reconfigurable seats. The front passenger and right rear seats flip up and fold in toward the center console, creating a long, unobstructed storage space. The GMC Granite Concept functionally addresses the needs of young professionals and their activities without compromises.
The cargo area includes a number of compartments to store items out of sight. Cargo hold-down provisions are built into the cargo area and the seatbacks have clasps that can be used when the seats are upright or folded to help secure cargo.

The GMC Granite Concept's interior is finished with dark tones on the bottom and complementing, lighter colors on top, including suede-like Nubuck material on the seats and instrument panel. The interior is further accented by satin-finish and anodized trim. The instrument panel gives the impression of a command console, with driver-focused instruments and controls set in an anodized panel.

"The look, feel and functionality of the instrument panel remind you of a fine instrument or tool," said Lyon. "Indeed, the GMC Granite Concept is like that - a precision instrument wrapped in a protective, industrial case."

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2010 GMC Terrain

All-new 2010 GMC Terrain makes its world debut at the 2009 New York International Auto Show. The GMC Terrain is a five-passenger crossover SUV that blends bold styling with fuel efficiency and premium features.
"The new Terrain brings GMC's history of innovation and engineering excellence into a smaller, fuel-efficient package for today's buyer," said Susan Docherty, Buick-Pontiac-GMC vice president. "The capability attributes that make a vehicle a GMC are ingrained in GMC Terrain, making it an appealing choice for existing traditional SUV customers who are looking for distinctive styling and increased efficiency."
A new, 2.4L four-cylinder engine that features direct injection is expected to deliver best-in-segment highway fuel economy of 30 mpg. Maximum fuel economy is achieved in part with an "ECO" mode that is activated via a console-mounted button. When engaged, it lowers the torque converter lockup speed to 1,125 rpm to help save fuel on models equipped with the 2.4L engine.

Also available will be a 3.0L DOHC direct injected V-6 engine delivering an estimated 264 horsepower (197 kW). Both engines are mated to efficiency-enhancing six-speed automatic transmissions and offer a refined, confident driving experience.

"GMC is a strong, core brand for GM and the GMC Terrain crossover SUV is the latest example of how we're adapting to changing market conditions," said Docherty. "As we first demonstrated with the Acadia crossover, GMC is committed to offering the capable vehicles customers seek, with the personal technologies they expect."

 The 2010 Terrain goes on sale in late summer, with front-wheel-drive and all-wheel-drive models offered in SLE and SLT trim levels. A comprehensive list of standard and available features includes purposeful technologies such as:

• Standard rear vision camera
• Programmable power rear liftgate
• Bluetooth hands-free phone capability
• MultiFlex sliding rear seat that increases passenger comfort or provides optimal cargo space
• Remote vehicle start
• USB audio connectivity; MP3 playback
• Seven-inch touch-screen navigation system and a 40-gigabyte hard drive
• DVD-based rear-seat entertainment system with two independent screens
• Standard OnStar and XM Satellite Radio

Segment-best safety is anticipated, with features that include four-wheel disc brakes with StabiliTrak electronic stability control and traction control, as well as six standard air bags: dual frontal air bags; head curtain side air bags and pelvic/thorax seat-mounted side air bags. OnStar with one-year Safe and Sound service is also standard.

Bold styling
GMC Terrain has a balanced, athletic stance and offers a commanding view of the road. Its design is characterized by bold, muscular fender flares, representing GMC's aesthetic. Surfacing is angular yet refined, with a strong and capable front-end appearance that features precise, squared-off edges.
"We wanted to carve the GMC Terrain away from the pack and establish its identity as a powerful, fresh crossover SUV with a confident and strong stance," said John Cafaro Jr., director of exterior design, Global Crossover Vehicles. "Everything about the GMC Terrain communicates a sense of tailored toughness and passionate craftsmanship."
Additional design features include a unique, three-element grille that is accented by a prominent chrome surround and projector-beam headlamps mounted in large, rectangular housings with chrome accents.

Interior details and flexibility
The GMC Terrain's rich, premium interior is influenced by industrial sculpture and exudes refinement exemplified by contrast stitching and fine materials that create a structured look throughout the cabin. A "floating" center stack, highlighted by warm ambient lighting, houses a multitude of ergonomic comfort and convenience controls.
The GMC Terrain also features great attention to detail, with smart use of storage space and compartments that are suitable for a variety of items. They include an oversized glove box; a closed storage area in the instrument panel above the center stack; a closed storage compartment under the center armrest large enough for a laptop computer; and two-tier storage in the doors.
GMC Terrain's seats were developed to provide outstanding comfort and the standard MultiFlex sliding rear seat can be moved fore or aft nearly eight inches (200 mm), providing increased passenger comfort or greater rear cargo capacity. The 60/40-split rear seatback offers additional configurations for passengers and cargo; and the rear cargo area offers 31.6 cubic feet (894 liters) of storage, as well as one of the GMC Terrain's four auxiliary power outlets.

Confident and agile driving experience
Two new engines are offered on all GMC Terrain models, each with fuel-saving direct injection and variable valve timing technology. Vehicle highlights include:

• New 3.0L DOHC direct injected V-6 engine estimated at 264 horsepower (197 kW), which delivers an estimated 25 mpg highway, 18 mpg city (EPA certification pending).
• New 2.4L Ecotec direct injected I-4 engine estimated at 182 horsepower (136 kW) that delivers an estimated 30 mpg highway, 21 mpg city (EPA certification pending)
• Driving range of more than 500 miles (800 km) with both engines, for less-frequent fill-ups

The powertrains are mounted on a rigid, body-integral structure, with single-piece body side stampings and targeted applications of high-strength steel. It is the foundation of a confident driving experience that is both smooth and responsive.

GM's first application of Active Noise Cancellation (ANC) technology is used on 2.4L-equipped models. ANC uses microphones to detect booming sounds inside the vehicle and sends counteracting sound waves through the audio system's speakers, ensuring a quiet driving experience at almost all vehicle speeds.
The GMC Terrain rides on a 112.5-inch (2,857 mm) wheelbase and features a four-wheel independent suspension system, with wide front and rear tracks that enhance the ride and handling. A family of 17-inch, 18-inch aluminum and 19-inch chrome-clad wheels is available.
GMC Terrain's rack-mounted electric power steering system provides greater fuel efficiency on four-cylinder-equipped models, saving nearly 11 miles per tank of gas.
GMC Terrain will be produced at the CAMI assembly facility in Ingersoll, Ontario.

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2011 GMC Sierra All Terrain HD Concept

The GMC Sierra All Terrain HD concept is an exploration of heavy-duty truck capability combined with greater off-road versatility. It is highlighted by a bold exterior design, enhanced all-terrain suspension and premium details expected of a GMC - all designed to enable greater access to off-road destinations.
The new 2011 Sierra HD underpins the All Terrain HD concept, with a modified, production-based 4WD chassis and the Duramax diesel/Allison 1000 six-speed powertrain. The enhanced suspension and unique body dimensions, including increased ground clearance and wider track, as well as greater approach/departure angles, deliver off-road capability while maintaining HD levels of payload and trailering capacity.
"The Sierra All Terrain HD concept takes GMC's outstanding new HD platform to the next level, marries it to the legendary Duramax diesel/Allison transmission, and provides a heavy-duty expression of GMC's premium All Terrain package," said Lisa Hutchinson, GMC product marketing director. "It delivers the exceptional capabilities of the Sierra HD - hauling, towing and performance - and applies them to the toughest driving environments. It's the ultimate professional-grade tool for construction crews, ranchers and adventurers whose activities aren't limited by where the pavement ends."

The GMC Sierra All Terrain HD features a unique five-foot, eight-inch Crew Cab/short box body configuration that supports a wheels-at-the-corners proportion. Shorter in overall length than production Sierra HD models, the concept's dimensions contribute to greater approach/departure angles. Additional off-road elements include:

• Wider, 73-inch (1,853 mm) track for greater stability
• Approximately 3 inches (76 mm) greater ground clearance
• Custom front upper and lower control arms
• Specially constructed Fox off-road shocks with remote fluid reservoirs (integrated in the wheel house liners)
• Front and rear jounce shocks
• Electronic front stabilizer bar disconnection
• 35-inch-tall BFGoodrich KM2 "mud terrain" tires mounted on 20-inch machined aluminum wheels
• Full composite underbody protection.

"The capability-enhancing attributes of the GMC Sierra All Terrain HD build on the already outstanding capabilities offered in the all-new production Sierra HD trucks," said Hutchinson. "Although it is strictly a concept, it is a pretty realistic one."

Purposeful design
From every angle, the All Terrain HD looks the part of a dedicated off-road performer, with bold, accentuated features complemented by a wide stance and tall profile.
Streamlined bumpers are designed to enhance approach/departure angles and incorporate frame-mounted recovery hooks - with integrated skid plates. A large, airflow-optimized grille maximizes cooling in tough conditions, while a forced-induction hood delivers more air to the Duramax diesel engine.
"The design of the All Terrain HD is an expression of its capabilities - strong, functional and absolutely professional grade," said Carl Zipfel, design manager. "We're excited about the design elements and exploring how they could apply to future GMCs."
Large fender flares stretch away from the body to cover the 35-inch-tall BFGoodrich tires. At the rear, the cargo box features lockable, lighted storage compartments, along with a number of tie-down cleats, including a pair in the bed floor and two on each side of the bed. A non-slip rubber pad is used on the tailgate, while two special compartments inside the cargo box provide access to a 110-volt power outlet and air compressor. A composite bed liner with a unique "circuit board" pattern provides a protective cover for the bed.

Motorized, deployable assist steps for the cab and cargo bed make it easier to enter and exit the All Terrain HD, while maximizing ground clearance during off-road driving. It also incorporates a number of industrial-grade lighting elements to provide greater visibility for safer driving where stars may be the only other source of illumination. The lighting details include:

• High-intensity LED headlamp, taillamp and fog lamp lighting mounted in impact-resistant composite housings and featuring edge-lit illumination
• High-intensity LED park and turn signal lamps
• Smooth-appearance front marker lamps integrated behind the top edge of the windshield glass
• Integrated center high-mounted stop lamp and rear marker lights mounted at the top edge of the rear window glass
• LED floodlights for the cargo bed and assist steps.

The All Terrain HD is painted Iridium Metallic - a dark charcoal color that reveals a reddish, anodized inflection when viewed from certain angles. It complements other anodized and satin-metal finishes on the exterior, which give the truck a more precise and functional appearance.

The interior matches the exterior aesthetic, with premium appointments and increased functionality, including enhanced lighting. It conveys solidity and precision, blending accent details such as stainless steel mesh and satin chrome with an amplified expression of the All Terrain's premium features. Two-tone dark gray leather seats, matched with embossed carbon fiber-style leather on the seating surfaces, have red contrast stitching. Additional leather-wrapped interior features include the steering wheel, instrument panel and center console.
A new navigation radio is also featured on the GMC Sierra All Terrain HD concept and previews future radios to be offered in GMC vehicles. An integrated 80-gig hard drive contains map data for the navigation system. It eliminates the need for a map disc and provides greater storage of music from portable devices. It also features DVR-style "time lapse playback," which allows up to 20 minutes of recording/playback from the AM/FM/XM radio stations.

All Terrain chassis and suspension
Based on the chassis of the 2011 Sierra HD trucks, the All Terrain HD features a fully boxed steel frame with exceptional strength and torsional stiffness. It incorporates the production models' new independent front suspension and asymmetrical rear leaf-spring suspensions, but with a wider 73-inch (1,853 mm) track (front and rear) that enhances stability during off-road and highway driving. A production Sierra 2500HD has front and rear tracks of 68.8 inches (1,748 mm) and 67.3 inches (1,709 mm), respectively.
An increased ride height provides greater ground clearance of 21.1 inches (536 mm) at the rockers and 11.8 inches (300 mm) at the skid plates, while specialized Fox off-road shocks deliver exceptional damping on tough terrain. They were created specially for the All Terrain HD, with specific valving. The shocks feature visible, remote fluid reservoirs - connected to the shock bodies via custom hoses - mounted in the wheel house liners and are matched with front and rear jounce shocks. They add additional compression damping and more controlled rebound, which helps increase control, stability and handling.
The All Terrain HD also features electronic disconnection of the front stabilizer bar, which enables greater crawling capability on rocky terrain. The driver simply pushes a button inside the cab to disconnect it from the front suspension.

Custom upper and lower control arms for the front suspension are designed to work with the Fox off-road shocks and jounce shocks, while supporting the greater ground clearance and ride height. They contribute to the wider track, as do the aggressive 20-inch machined aluminum all-terrain wheels. The wheels are deep, with six split-spoke elements, and are constructed in a reverse drop-flange method that ensures optimal strength. They also feature a mix of satin chrome and anodized aluminum finishes, which provide durability and a premium appearance that complements the body's Iridium Metallic color.
A full composite underbody protection system shields the All Terrain HD's transmission, drivetrain, fuel tank, exhaust system and axle differentials. It starts with the front bumper, which rolls beneath the truck and leads to a composite, integral belly pan that covers a front suspension skid plate. Protective covers are also mounted beneath the driveline components, while the front and rear differentials feature direct-mounted skid plates. The rear bumper is integrated with the rear skid plate.

Powertrain details
The GMC Sierra All Terrain HD concept is propelled by the new, production 6.6L Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission powertrain combination offered in the 2011 Sierra HD trucks. The Duramax is rated at 397 horsepower (296 kW) and 765 lb.-ft. of torque (1,037 Nm).
The powerful 6.6L Duramax is more fuel-efficient - with up to 11-percent greater fuel economy than previous versions - and reduces NOx emissions by up to 63 percent. The powertrain's efficiency is assisted by the Allison 1000 transmission, which requires less engine power to funnel torque to the axles. It also incorporates a "smart" exhaust brake feature that helps save wear on the brakes on downhill grades, a feature available on production Sierra HDs.
With the same proven powertrain as production Sierra HD trucks, the All Terrain HD delivers comparable hauling and towing capabilities, including:

• Estimated payload capacity of 2,700 pounds (1,225 kg)
• Estimated conventional towing capacity of 13,000 pounds (5,896 kg)
• Estimated fifth-wheel towing capacity of 15,600 pounds (7,076 kg).

The GMC Sierra All Terrain HD also features four-wheel drive, with automatic locking front and rear differentials, while the 14-inch, four-wheel disc brake system from the production Sierra HD provides the stopping power for this unique off-roader.

GMC SIERRA ALL TERRAIN HD CONCEPT SPECIFICATIONS

• 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: 397 hp (296 kW) @ 3000 rpm
• Torque: 765 Nm (1037 lb.-ft) @ 1600 rpm
• Transmission: Allison 1000 six-speed automatic
• Suspension
  • front: long- and short-arm independent with torsion bars
  • 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)
  • front: 13.97" x 1.57" / 355 x 40 mm
  • rear: 14.17" x 1.34" / 360 x 34 mm
• Wheel size and type: 20 x 9.5-inch aluminum
• Tire type and size: BFGoodrich KM2 325/60R20
• Wheelbase: 148.6" / 3774 mm
• Overall length: 230.9" / 5864 mm
• Overall width: 83" / 2106 mm
• Overall height: 81.8" / 2077 mm
• Track
  • front: 73" / 1853 mm
  • rear: 73" / 1853 mm
• Minimum ground clearance
  • 21.1" / 536 mm (at rocker panels)
  • 11.8" / 300 mm (at skid plates)
• Approach angle
  • front: 39°
  • rear: 31°
• Maximum payload (est.): 2700 lbs. / 1225 kg
• Maximum towing capacity (est.)
  • ball hitch: 13,000 lbs. / 5896 kg
  • fifth-wheel hitch(est.): 15,600lbs. / 7076 kg

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