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2013 GMC Terrain Denali

May 24th, 2013 in News

2013 GMC Terrain Denali

Two premium upgrade options are new to the 2013 GMC Terrain: the Denali trim package and a 3.6L V-6 rated at 301 horsepower. Well, make that three options—you could get both.
There isn’t much subtlety to the Denali trim. The signature chrome grill is anything but shy, and exclusive 19” wheels accurately reflect the longing stares and dropped jaws of onlookers. Inside the cabin, contrast stitched leather with the embossed Denali logo and wood trim accents create a premium look and feel. Soft touch materials run throughout the dash and doors, with accent lighting showing off the meticulous details. Innovative safety features Forward Collision Alert, Lane Departure Warning, and Side Blind Zone Alert use small visual and audible cues to let you know where potential dangers are, giving you the time to react accordingly and keep the chrome unscathed. And Rear Cross Traffic Alert will let you know when a gaping onlooker creeps up for a closer look.

2013 GMC Terrain Denali
For an extra kick in engine power, The 3.6L V-6 is rated at 301 horsepower and manages 24 mpg on the highway. With 14 percent more horsepower and 22 percent more torque, noticeable gains in acceleration clearly set it apart from its 3.0L predecessor. The upgraded engine makes the Terrain Denali is capable of 6.7 second zero to sixty times. It’s equipped with Variable Valve Timing (VVT), perfect for high-power, low-speed situations like trailering or steep inclines. The Direct Injection system injects fuel at over 2000 psi, ensuring an even mixture in the compression chamber.
The GMC Terrain Denali the rugged crossover full of big ideas. The longest wheelbase in its class allows for the head room and leg room of a full size SUV, without the extra weight. MultiFlex seating slides 8 inches back for best-in-class rear passenger leg room, or all the way up for 31.6 cubic feet of cargo space. Folded down, the cargo space shoots up to 64 cubic feet, plenty of space for big boxes or bulky furniture.
While the Terrain comes nicely equipped from the factory (the sunroof is standard), there’s a certain beauty to adding premium features to professional grade. The 2013 GMC Terrain Denali has everything—power, capability, and luxury all in one.

2013 GMC Acadia Denali

February 3rd, 2013 in News

2013 GMC Acadia Denali

There’s a certain feeling owners of the 2013 Acadia Denali share: confidence. It’s a feeling that begins when you remote start the car, activating the automatic climate control while you make a coffee to go, prepare lunch, find the kids, or all of the above. By the time you’re ready, so is the Denali. Nestled in the driver’s seat, you’re confident that the Acadia Denali doesn’t just tackle the day—it does it better than anyone in its class.

This car will move you. And up to eight passengers. True craftsmanship isn’t just seen—it’s felt, and can only be developed over generations of car making. Inside the cabin, you’re surrounded by soft touch material: throughout the dashboard, door panels, and center console. Warm ambient lighting adds to the natural light streaming in from Dual-Skyscape sunroof, reflecting off of the aluminum trim accents. Real stitching on the instrument panel and leather seats shows the impeccable attention to detail. Every stitch, like every other component in the vehicle, has been expertly sewn to create a synthesis of parts, all working together in unison to provide the quintessential crossover experience. It only gets even better as you bring the 3.6L V6 engine to life, and witness the smooth and quiet ride the Acadia delivers, thanks to noise –dampening materials hidden everywhere from the engine bay to the rear panels. The transmission shifts seamlessly between gears, and hydraulic power steering variable effort feels smooth and effortless.

2013 GMC Acadia Denali

The Acadia’s bold, clean lines reflect a sense of professionalism. Sharp HID headlamps with LED accents increase visibility during all times of the day and night, and projector beam fog lamps help in inclement weather. Of course, if that doesn’t get their attention, all new 20-inch chrome clad aluminum wheels will. Stunning in sunlight, sleek at night. The Acadia Denali’s exterior is all about the seamless integration of form and function. Find the tow hitch discreetly hidden, giving the exterior clean lines but remaining easily accessible. Or take a look at the glass-to-glass tailgate corner, a slick design detail with a secret—underneath the glass is a unitized body fortified by high-strength steel. Sure, the Acadia Denali boasts clean lines and a bold look, but it also provides the strength and security you need to feel confident behind the wheel. The 2013 Acadia is bigger, bolder, and better, and appearances are just the beginning.

It’s not enough to simply look good—we just wouldn’t have it any other way. Functionality is everything in a crossover vehicle, and the 2013 Acadia Denali takes this idea further than any other vehicle by allowing customization every step of the way. For seven passenger capacity, choose a second row of captain’s seats, or to maximize capacity at eight passengers, choose the split bench seat. Either way, SmartSlide allows easy access to the third row, and a number of cargo space options become immediately available. Fold one seat down (or part of the bench) down to combine cargo and passenger space, or fold them all down for ultimate cargo capacity. We’re talking about a maximum of 116.1 cubic feet of cargo room, enough space for the biggest box you’d ever want to load or unload. The driver and front passenger both have eight-way adjustable power seats, each with two memory settings, and four-way adjustable headrests. Sit exactly how you like to, every single time. Three distinct climate zones (front, passenger, and rear) allow everyone to be comfortable no matter the preference. That means less time arguing over the thermostat (see also: never arguing over it again) and more time enjoying the Bose surround sound. By not only providing the essential components to make daily tasks easier, but also the ability to customize each component to the driver’s and passengers’ unique tastes, the Acadia Denali raises the bar in comfort and convenience.

2013 GMC Acadia Denali

Controlling the Acadia Denali’s array of technology features is easy: just tell it what to do. The IntelliLink control panel can effortlessly make a phone call, find a location on GPS, or play a specific radio station by simply listening to you. Additional controls on the steering wheel and touch screen give you the flexibility you need, when you need it. Smartphone connectivity through Bluetooth synchronizes without a hitch, and there’s even a compartment in the dashboard with USB port. A heads-up display projects information onto the dashboard, such as your current speed or vehicle settings, so that you can keep your eyes on the road. Backseat passengers can enjoy a DVD entertainment system, or plug in their own electronics in the A/V and power ports. Vacationing with children (even the fully grown adult kind) has never been this easy.

2013 GMC Acadia Denali

Confidence of a different sort comes from the level of safety in the Acadia Denali. Have a little fun—shock your friends and family by closing the rear lift gate on your hand. Automatic sensors disengage the clutch, and your hand miraculously comes out unscathed. Same for the driver side window, a potential finger-saver. Even the location of the battery, centrally under the 2nd row seating, protects it from nasty collisions, allowing use in a possibly critical situation. In the engine bay, every connection is triple-sealed to keep components working correctly, even in the worst weather conditions. But these are all small details, simply rounding out the overall safety the Acadia provides before, during, and after a collision.

Let’s start with the before. Backing up is easy with the IntelliLink display, which indicates visually and audibly how close you are to objects. It alerts you when some crazed individual drives through the grocery store parking lot in the wrong direction—it happens, so we addressed it. Blind zone alerts, through small LEDs in the side mirrors and warning tones, help eliminate minor accidents when changing lanes. The tire pressure monitoring system doesn’t just tell you a tire is low—it tells you which one, and by how much. You can even access this kind of information through the OnStar app for smartphones, so you’ll know even before you’re behind the wheel. When the roads are slippery or uneven, antilock brakes and StabiliTrak (registered) keep you in control of your vehicle.

Yet preventive measures and technology can only do so much. In the event of a collision, the Acadia’s safety cage made from high strength steel keeps the driver and any passengers safe, while crush zones in the front and rear absorb the energy from the impact. An industry-first addition of the front-center airbag protects the driver and passenger from colliding into one another in a side impact collision. Headrests move forward automatically to help prevent whiplash, and pretensioners in the seatbelts minimize forward movement. Simply getting five stars isn’t enough. This is the Acadia Denali, where safety innovation goes beyond maintaining a high safety rating.

After an accident, the OnStar service kicks in, powered by the Acadia’s centrally located battery. Crucial, life-saving information is automatically relayed to emergency responders, including the car’s location, the direction and number of impacts, and rollover status. These details can make all the difference when the first responders arrive. With additional features like Remote Ignition Block to stop thieves, remote door unlock for those “whoops” moments (not you, no, never you), and roadside assistance, the value of OnStar becomes pretty clear.

2013 GMC Acadia Denali

When you look at the competition, they simply don’t stack up. Let’s take a look at the Honda Pilot. Sure, they’ve addressed the noisy ride in previous models, and improved the fuel economy for 2013. However, you can say goodbye to engine responsiveness, interior refinement, remote start, or easy access to the third row. In terms of safety, the Pilot scored “Good” for frontal and side-impact crashes, but only “Marginal” in the roof-strength test. Now, the Ford Explorer. It’s lighter and roomier than its predecessors, sure, but how does it do against the Acadia Denali? For starters, you can say goodbye to the eighth passenger and the standard power lift gate. You can also say hello to the Sync system, but we’re not so sure it will understand you the first time.

Where does confidence come from? For us, it comes from making the right decisions. From using the strongest steel. From innovating the latest technology. From finding the right balance of power and efficiency, of form and function.

We’re confident in the 2013 Acadia Denali. Are you?

2013 GMC Acadia Denali

November 19th, 2012 in News

2013 GMC Acadia

The 2013 Acadia Denali. A luxury crossover that isn’t afraid to get its shoes dirty.

The Acadia Denali gets its name from a vast expanse of wild Alaskan land, and is named so for two reasons: to capture the beauty of the landscape, and the ability to conquer it. Look no further than the aggressive front end design, with bold lines and chrome accents, or the signature LEDs in the headlights. On 20-inch machined aluminum wheels, the Denali conquers its namesake landscape, or any other landscape, in unprecedented style.

Luxury comes standard in the 2013 Acadia Denali, with a SkyScape double sunroof, heated and cooled front seats, a heads-up display, and a slew of technological amenities. A ten-speaker premium Bose system surrounds the cabin, which was designed with an acoustic package to help eliminate road and wind noise. Go ahead, start figuring out your playlist. Just be certain that you’ve never heard your favorite songs quite like this. While you’re thinking of that playlist, go ahead and figure out the other seven passengers you decide to escape reality with for a little while. Even the third row is comfortable, which certainly can’t be said for all crossovers, and there’s still cargo room to spare. Six months of included OnStar ensure you won’t get lost, even when you decide to take the excursion into uncharted territory. There’s a certain beauty to tackling nature’s toughest terrain with a leather-wrapped, mahogany accented steering wheel. Adventuring has never felt this good.

Safety comes standard, too, handy for those city-bound adventures. The seven air bags, daytime running lights, and side blind zone alerts ensure your safety on crowded streets. Standard anti-lock brakes and available all-wheel drive give you confidence in your and your passenger’s safety. And a rear view camera helps you maneuver through tight spots with ease. Any terrain, indeed.

Sure, by the week you’re a commuter, a parent, a carpooler, or otherwise. But all of that is after the car wash. The weekend excursions can be our little secret. Or up to eight of ours.

2013 GMC Terrain Denali. The sunroof is standard.

October 18th, 2012 in News

2013 GMC Terrain Denali

The Denali has gone to the gym, bulked up, and demands that its big brothers Yukon and Sierra show a little more respect. With a more powerful 3.6L V6 engine and new luxury features, the Terrain Denali establishes its distinct place in the GMC family.

Its newfound strength doesn’t come at the expense of its efficiency. The new engine holds the same EPA-rated fuel economy as its predecessor at 24 highway mpg, but offers 14 percent more horsepower and 22 percent more torque. At just over 300 horsepower, the 2013 Terrain Denali has put on a bit of muscle. Yet fuel saving technology like direct injection and camshaft phasing show as much brains as brawn.

When it comes to luxury features, the Terrain Denali trim package picked up a few tricks you may not have seen yet. The signature badging embossed into the soft-touch leather seats and the illuminated badging in the door sill plates makes the interior unmistakably Denali. Smoked mahogany wood within the leather wrapped steering wheel and rich red stitching in the seats and console bring elegance and color to the cabin. Eight-way power driver and passenger seats maximize seating options and comfort. Best-in-class second row legroom allows passengers to enjoy independent, built in 8-inch seatback mounted screens. A simple touch of a button accesses 63.9 cubic feet of cargo space and the power to haul it when it’s full. That’s not to mention your own luxury electronics, in the form of the IntelliLink infotainment console. Featuring its own color touchscreen, this configurable software allows smartphone connectivity, radio via Pandora or Stitcher, and OnStar (a six month free trial is included). Its flush integration into the dash leaves control at your fingertips, or you can simply command it with your voice.

And did we mention the sunroof is standard?

The Terrain Denali’s safety features ensure you don’t hurt yourself when you go around flexing all that new extra muscle. All models include four-wheel disc brakes with StabiliTrak electronic stability control and traction control. Also included are six standard air bags, including seat-mounted side airbags. For the ultimate protection, we offer Forward Collision Alert, Lane Departure Warning, and Rear Park Assist in a new safety package available for 2013. These features provide visible and audible warnings that help watch your blind spots for you.

The real question is, how haven’t you upgraded yet?

Test drive the new Terrain Denali today. It’s ready to show off for you.

2011 GMC Acadia Denali

March 25th, 2011 in News

2011 GMC Acadia Denali

A new, premium Denali model joins the GMC Acadia lineup for 2011, adding a new dimension of luxury and exclusivity to this popular crossover. It brings the distinctive Denali design elements, including a chrome honeycomb grille and monochromatic exterior color cues, along with exclusive fascias, high-intensity discharge headlamps and unique interior features.

“The GMC Denali models have come to stand for luxury and exclusivity, and that’s just what customers will get in the new Acadia Denali,” said Lisa Hutchinson, GMC product marketing director. “The decision to develop an Acadia Denali was made quickly within the new GM in response to customer and dealer demand for a Denali version ever since the launch and success of the Acadia.”

2011 GMC Acadia Denali

Indeed, the Acadia continues to win over customers. In a still-recovering market, Acadia sales were up nearly 45 percent in the first quarter of 2010, making it second in brand sales to only the broad Sierra range of trucks.

In addition to the new Acadia Denali, the Acadia is offered in two cloth trims, SL and SLE, and leather trims designated SLT1 and SLT2. All models are available in front-wheel-drive and all-wheel-drive with seven- or eight-passenger seating configurations. A comprehensive safety system includes six standard air bags and standard StabiliTrak electronic stability control system with traction control and rollover mitigation technology.

Acadia at a glance

Acadia’s body-frame integral structure enables lower entry/exit height for passengers. Despite the vehicle’s SUV-like front-end height, the front door step-in height is only 18.9 inches (480 mm); the rear door step-in height is 19.8 inches (503 mm). Entry to the second- and third-row seats is easy with very wide rear doors and GM’s exclusive Smart Slide second-row seat feature.

All models are powered by a 3.6L V-6 VVT engine that uses gasoline direct injection technology to optimize performance and fuel economy. The engine is paired with Acadia’s fuel-saving six-speed automatic transmission to help give FWD models an EPA-estimated 24 mpg on the highway. The Acadia also is capable of towing up to 5,200 pounds (2364 kg), when properly equipped.

2011 GMC Acadia Denali

Acadia’s interior exudes refinement and attention to detail, with many thoughtful features designed into a finely crafted environment. A car-like “low and away” instrument panel enhances the feeling of openness in the front-row seats and provides a commanding outward view. The instrument panel and other interior elements feature high-quality, low-gloss materials and tight gap tolerances.

Acadia Denali details

The 2011 Acadia Denali is available in front-wheel-drive and all-wheel-drive models, as well as seven- and eight-passenger seating configurations. It stands out with its signature Denali design cues, highlighted by the monochromatic exterior and chrome honeycomb grille.

Further distinction comes with 20-inch, two-tone chrome-clad wheels. The six-spoke wheels feature black chrome spoke inserts set against bright chrome. It is offered in five exterior colors: Quicksilver Metallic, Summit White, Carbon Black, Red Jewel Tintcoat and White Diamond Tricoat.

Seating and storage

All Acadia models offer three rows of seating that can be configured for seven or eight passengers, regardless of the trim level. The seating configurations include two front bucket seats, a 60/40-split second-row bench (three passengers) or two second-row captain’s chairs (two passengers) and a 60/40-split third-row bench seat. Generous storage space of 24.1 cu. ft. (682 liters) is available behind the third-row seat (with the cargo management removed).

GM’s exclusive Smart Slide feature is standard on all second-row configurations, allowing quick and easy access to the third-row seating area. The second-row seat cushion flips up while the seatback slides forward, effectively compressing the space occupied by the seat with the pull of a lever. The Smart Slide system also allows the second row to be positioned fore/aft. When adjusted rearward, the second-row seat provides more legroom for taller passengers; when adjusted forward, it provides more storage space or additional legroom for third-row passengers. Seating space is sufficient for adults in all positions.

2011 GMC Acadia Denali

Access to the third-row seat also is aided by Acadia’s rear door width, which is wider than the doors on most other SUVs. The vehicle’s long wheelbase also enables greater accessibility. The rear door opening was maximized by reducing the space between the rear door and the leading edge of the door opening. Engineers were able to maximize the opening space while providing optimal chassis integrity for maximum occupant protection.

Along with comfort and ease of entry, Acadia’s interior offers generous cargo room, including 115.9 cu. ft. (1,382 L) when the second- and third-row seats are folded flat and the cargo management removed. Additional storage is also available in a covered rear cargo convenience center behind the third row that allows items to be stored out of sight beneath the rear cargo floor.

Ride and handling

Acadia rides on a long 118.9-inch (3,020.7 mm) wheelbase and wide 67.28-inch (1,709 mm) front/rear tracks – a combination that lowers the center of gravity and enables smooth, stable ride and handling. Sharp reflexes are also supported by independent front and rear suspensions. The front suspension features a MacPherson strut design, with a direct-acting stabilizer bar and aluminum knuckles. Isolated mounting points help reduce noise and vibration.

The rear suspension uses a compact, state-of-the-art linked “H” design, which uses an isolated mounting system to reduce noise and vibration transmitted to the passenger compartment. This design enables the handling prowess that comes with an independent suspension, but with minimal floor pan intrusion – a feature that helps the Acadia offer generous passenger and cargo space.

2011 GMC Acadia Denali

Acadia features standard power-assisted rack-and-pinion steering, with variable-effort steering available. The suspension and steering system meet the road via standard 18-inch wheels and tires, with 19-inch wheels available. Four-wheel disc brakes with ABS are standard.

Acadia’s available Intelligent AWD system enhances dry-road handling and provides increased traction on wet, snow and ice-covered roads. It actively manages the torque distribution between the front and rear axles, based on factors such as wheel speed, throttle and surface conditions. There is no driver intervention; the system automatically decides how much torque to apply and it automatically delivers torque to the wheels that have the best traction. The AWD system’s tuning is revised to provide more rear torque bias during certain driving conditions.

Safety

Acadia’s 360-degree safety system helps protect passengers before, during and after a crash. A strong structure is the foundation, while a wide stance and low center of gravity helps reduce the likelihood of a rollover. Acadia’s structure is reinforced in numerous areas with high-strength steel, including a stiff steel cross-car beam welded across the floor between the B-pillars. It also uses dual-phase steel in select areas, such as the lower engine compartment rails. Dual-phase steel is strengthened in the paint oven and offers easier formability, reduced mass, greater strength and better crash energy absorption than most high-strength steels.

Acadia is equipped with six standard air bags: two dual-stage frontal air bags for the driver and front passenger; two seat-mounted side-impact air bags in the first row; and two head curtain side-impact air bags that cover all three seating rows. The head curtain side air bags are among the longest air bags in any production vehicle.

Complementing the air bags is GM’s rollover sensing system, which can preemptively activate the side-impact air bags if sensors determine a rollover is imminent. In the event of a rollover, the air bags stay inflated longer to provide increased occupant containment.

Acadia also comes standard with OnStar 9.0 (with a six-month Directions and Connections plan including Turn-by-Turn navigation and Destination Download) that features Automatic Crash Response.

Acadia is covered by GM’s five-year/100,000-mile powertrain warranty and three-year/36,000-mile bumper-to-bumper warranty – the best coverage in America.

2011 GMC Sierra Denali HD

March 25th, 2011 in News

2011 Sierra Denali HD

GMC Sierra Denali 2500HD and 3500HD – the first offerings of the exclusive Denali line on a heavy-duty GMC pickup – lead a new Sierra heavy-duty truck lineup for 2011. The comprehensively redesigned roster of 2011 Sierra 2500HD and 3500HD trucks includes a new, more powerful 6.6L Duramax turbo diesel that delivers 397 horsepower (296 kW) at 3,000 rpm and 765 lb.-ft. of torque (1,037 Nm) at 1,600 rpm.

The new Sierra Denali HD is the latest expression of GMC’s Denali philosophy of blending capability with premium features and styling,” said Lisa Hutchinson, GMC product marketing director. “It is a premium tool that offers many comfort and infotainment features, along with a maximum towing capacity of 21,700 pounds with the more powerful Duramax diesel.”

2011 Sierra Denali HD

The new Denali HDs are crew cabs available only in the 2500 series (3/4-ton), 2WD and 4WD configurations, as well as the 3500 Series (1-ton) 2WD and 4WD in both single-rear-wheel and dually versions. The 3500 series is also available in standard (6-foot 6-inches) and dually long box (8-foot) versions. A Vortec 6.0L gas V-8/six-speed automatic powertrain is standard and the new Duramax 6.6L turbo diesel/Allison 1000 six-speed transmission powertrain is available on all Denali HDs.

The iconic Denali four-bar, chrome grille with round air inlets distinguishes the Sierra Denali HDs on the outside, along with body-color bumpers, chrome door handles, chrome accents and 17- (Dually), 18- and 20-inch polished forged aluminum wheels. On the inside they include Denali-specific brushed aluminum trim, power-adjustable pedals, a Bose premium surround audio system and 12-way power seats. Along with an optional heated steering wheel, heated and cooled leather-appointed seating is available. The exterior is offered in three colors: Black, Stealth Gray and White.

2011 Sierra Denali HD

The balance of the new 2011 Sierra HD lineup is identified on the outside by new, three-bar grilles and powertrain-badged louvered hoods, along with a revised, full-width chrome steel front bumper and a new family of 17-, 18- and 20-inch wheels. It’s beneath the skin, however, where they are truly separated from their predecessors – and the competition.

“GMC has been one of the industry’s strongest truck brands for more than 100 years, and we back the 2011 Sierra HDs with a comprehensive five-year/100,000-mile powertrain warranty that provides the best coverage in America,” said Hutchinson. “From greater diesel power to the segment-best warranty, these trucks deliver strength and peace of mind on all fronts.”

Greater Capability

“You can see by the ratings numbers that the Sierra HD lineup is more capable, but the trucks are also better performers in the intangible qualities that bond owners with their trucks,” said Rick Spina, vehicle line executive. “They accelerate quicker – especially when fully loaded – stop more confidently and deliver a smooth, quiet driving experience that you have to experience to fully appreciate.”

Eleven all-new, fully boxed frame assemblies improve durability and ride characteristics; and support increased capabilities.

The frames have increased cross sections and use more high-strength steel for greater durability, higher towing capacity and improved ride and handling; the front sections are hydroformed. The bending and beaming stiffness of the frames is increased 92 percent and 20 percent, respectively, with the fully boxed sections enhancing torsional stiffness by a factor of five. Also, larger engine and transmission mounts, coupled with a 125-percent-stiffer front frame structure, provide greater vibration control, while hydraulic body mounts are incorporated under the cab section on extended and crew cab models for a more isolated feel inside.

Engineers addressed common customer and aftermarket uses when designing the new frames, including adding access holes to the rear frame section to enable easier installation of fifth-wheel/gooseneck-style hitches. Also, the frame-mounted hitch for conventional trailering is stronger, with a box-tube design. It supports up to 17,000 pounds (7,711 kg).

New, stronger front suspension enables snow plow installation on all 4WD models.

A completely redesigned independent front suspension system offers up to a 25-percent greater front axle weight rating – up to 6,000 pounds (2,721 kg) front gross axle weight rating (FGAWR) – so a snow plow can be used on all 4WD cab configurations with the available snow plow prep package. Sierra’s signature short-long arm/torsion bar front suspension design is retained, but now features new, forged steel upper control arms that are stronger and lighter than their predecessors.

2011 Sierra Denali HD

The new lower control arms are made of precision-machined cast iron to handle the greater loads. Five different torsion bar rates support five different front gross axle weight ratings (a single torsion bar was previously used for all models). This helps stabilize the range of trim heights of various models under load, while enhancing appearance, handling, durability, tire wear and alignment. The trim height is adjusted on each bar via a single bolt, easily allowing the height to be changed to account for the weight of a snow plow or other accessories.

The Sierra HD front suspension now uses a pair of urethane jounce bumpers on each side, instead of one, for improved load management; and there’s a new upper shock mount attachment design that’s positively connected to the frame with two fasteners. This design eliminates squeaks and clunks, while supporting higher load capability and increased durability.

Compared to competitors’ beam-axle front suspensions, the Sierra’s independent front suspension provides a better ride, more accurate trim height control (with fewer parts) and greater flexibility to adjust the alignment for weight and tire sensitivity.

New, asymmetrical leaf-spring rear suspension supports greater loads.

Matching the Sierra HD’s greater strength and capability is a rear suspension designed to support greater loads. It features a new, larger asymmetrical leaf-spring design that also contributes to improved ride and handling characteristics. The asymmetrical design is derived from unequal front and rear spring half lengths, which minimize axle hop and enhance traction control efficiency.

2011 Sierra Denali HD

The 2500HD models feature a two-stage leaf-spring design, while 3500HD models have a three-stage design. All models feature 3-inch-wide (76 mm) leaf springs that are 20-percent wider than previous models. The larger leaf-spring design supports increased rear gross axle weight ratings across the board. On the 2500HD models, the rating is 6,200 pounds (2,818 kg) – up from 6,084 (2,765). On 3500HD models, the rating increases to 7,050 pounds (3,204 kg) on single-rear-wheel models and 9,375 pounds (4,261 kg) on dual-rear-wheel models – the latter representing a nearly 14-percent increase over the previous 8,200-pound (3,727 kg) rating.

Sierra HDs deliver a more refined driving experience.

Longer wheelbases – ranging from 133.6 inches (3,395 mm) to 167.7 inches (4,259 mm) – and wider front/rear tracks enhance the ride and handling characteristics of the Sierra 2500HD and 3500HD, giving them a greater feeling of smoothness and control. The longer wheelbases and wider tracks are complemented by the new, stiffer frames, new jounce bumpers, shock mounts and hydraulic body mounts to provide a solid, smooth and isolated driving experience. New shocks were specially valved to support the new trucks’ weight ratings, while balancing excellent ride characteristics.

A revised steering system designed to support the trucks’ greater front gross axle weight rating also enhances the driving experience. It includes a new, larger steering gear, power steering pumps and linkages. The pumps (different parts for gas and diesel models) deliver greater pressure for reduced steering effort in low-speed and parking maneuvers; they are also quieter. On some models, the new linkages feature a compliant joint added at the pitman attachment to enhance handling.

New 6.6L Duramax turbo diesel

The workhorse Duramax 6.6L turbo diesel V-8 is more powerful and durable for 2011, delivering 397 horsepower (296 kW) at 3,000 rpm and 765 lb.-ft. of torque (1,037 Nm) at 1,600 rpm. It also produces lower emissions and offers B20 biodiesel capability that promotes a domestically produced renewable fuel.

2011 Sierra Denali HD

Sierra HD’s selective catalytic reduction after-treatment system delivers better overall diesel performance, with a range of about 5,000 miles (8,000 km) between DEF refills. Its optimized combustion and after-treatment process provides about 700 miles (1,125 km) between diesel particulate filter regenerations.

New Allison 1000 six-speed automatic transmission

The enhanced Allison 1000 is strengthened to handle the higher torque capability of the new 6.6L Duramax engine, while also helping to improve fuel economy and provide seamless assistance with a new exhaust brake system. Greater efficiency is delivered through reduced “spin loss” – meaning, the transmission channels more of the engine’s power to the axles, allowing it to do more with less fuel.

The Allison 1000 also features driver shift control with tap up/tap down shifting and a patented elevated idle mode cab warm-up feature. Also, the tow/haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads. The six-speed configuration retains its two overdrive gears for optimal efficiency.

Performance with the Duramax/Allison combination is also improved over previous models, with preliminary testing showing 0-60 mph times of less than 9 seconds and quarter-mile times of less than 16 seconds in 2500HD models. That’s about 0.3-second and 0.5-second quicker, respectively, than previous models.

Vortec 6.0L/Hydra-Matic 6L90 six-speed powertrain is standard on all models.

The Vortec 6.0L gas V-8 with variable valve timing returns to the new Sierra HDs, along with a strengthened version of the Hydra-Matic 6L90 six-speed automatic transmission. This combination delivers excellent performance and efficiency, with a greater emphasis on low-rpm power. It is enhanced for 2011 with greater idle refinement.

The engine is rated at 360 horsepower (268 kW) at 5,400 rpm and 380 lb.-ft. (515 Nm) at 4,200 rpm in trucks with GVWRs up to 10,000 pounds. It is rated at an estimated 322 horsepower (240 kW) at 4,400 rpm and 380 lb.-ft. of torque (515 Nm) at 4,200 rpm in trucks with GVWRs greater than 10,000 pounds.

Brake feel and performance is greatly improved.

The standard four-wheel disc system is completely revamped to deliver smoother, more immediate and confident-feeling performance. Four-wheel, four-channel ABS is standard on all single-rear-wheel models and a three-channel system is standard on dual-rear-wheel models. The front and rear rotors are larger in diameter – 14 inches (355 mm) – and width on all models to support their increased capacity, weight ratings and trailering ratings, while the calipers are stiffer and stronger.

The revised hydroboost brake booster calibration reduces pedal effort, and the revised travel of the pedal provides a more comfortable, confident feel. Larger wheel hub and bearing assemblies complement the new brake system, and the rear rotors attach to the wheel hubs for easier servicing.

‘Smart’ exhaust brake provides greater control and reduces brake pad wear.

A new standard feature on Duramax-equipped models is the “smart” exhaust brake. This driver-selectable feature uses the turbine control of the variable geometry turbocharger and the compression of the engine to generate backpressure, slowing the vehicle without applying the brakes. It is integrated with the cruise control feature, and varies the braking to account for the grade and vehicle load. The exhaust brake allows for virtually effortless driving and towing, with seamless and quiet operation. It also helps prolong brake life and prevents overheating the brakes on long, downhill grades.

Safety features include trailer sway control system and hill start assist.

The trailer sway control system provides an added measure of confidence when towing a trailer. The system senses conditions of trailer sway and intervenes with braking and/or reduced engine power to bring the trailer under control and keep it on its intended path. The system uses electric trailer brakes when a trailer is plugged into the standard wiring harness of the truck, and its performance requires no input from the driver.

2011 Sierra Denali HD

The hill start assist system is automatically engaged when sensors detect the vehicle is on a grade of about 5 percent or greater. It holds the brakes for about 1.5 seconds or until the gas pedal is pressed, preventing rollback. It is particularly effective when towing, giving the driver time to switch from the brake pedal to the gas pedal without rolling.

Broad lineup – inside and out.

For 2011, the Sierra heavy-duty lineup expands to include 12 2500HD models and nine single- and dual-rear-wheel 3500HD models – including a new 3500HD Crew Cab with a 6.5-foot cargo box. Other models are offered in WT, SLE and SLT trim levels, while popular features such as the EZ Lift tailgate and rearview camera system are retained.

The interiors have excellent attention to detail and are quieter – thanks to the range of the truck’s enhancements. The stronger chassis, quieter Duramax engine and even details like a quieter power steering pump contribute to the Sierra HD delivering exceptional quietness.

2011 Sierra Denali HD

Along with quietness, Sierra HD models are designed for work. The interiors feature numerous storage compartments, providing covered access for everything from work gloves to laptops. For those who use their truck as a mobile office, Sierra HDs deliver with available mobile WiFi, USB connectivity, Bluetooth connectivity, XM Satellite Radio and a navigation system. Multiple charge points enable multiple electronic devices to operate simultaneously; and when equipped with the available navigation system, XM NavTraffic offers real-time updates of traffic conditions (in selected areas) that can help plan the most effective route to the job site.

Ready for the long haul – and the cold.

The 2011 Sierra HDs drive farther without stopping to refuel. A new, 36-gallon (136 L) fuel tank is standard on all models and, with the improved fuel efficiency of the powertrains, enables a cruising range of about 680 miles (1,090 km) with the Duramax 6.6L. Cold-weather customers will appreciate the Duramax 6.6L’s quick, reliable start-up, with a starting time on par with gas engines. Its glow plug cycle time is the segment’s best in all temperatures, taking no more than 3 seconds in temperatures as low as -20 F (-29 C). There’s also a cab heat-up feature that allows the engine to idle faster in low temperatures to warm the interior more quickly.

The best warranty coverage in America.

All 2011 Sierra 2500HD and 3500HD trucks work under the best warranty coverage in America: a five-year/100,000-mile limited powertrain warranty, plus roadside assistance, courtesy transportation and other features that provide assurance that GMC backs its trucks for everything the road offers.

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