2015 GMC Sierra All-Terrain HD – Real-Life Launch Photos of the King-Kong 2015 HD Truck

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GMC is on a roll right now – sales are way up, market share is up, and diesel engine adoption is above 70-percent among HD truck buyers.

This is all great news for the company, and shows that buyers are stepping up to the HD trucks in record numbers. The trade-offs for doing so are less than ever before, and the payout is far more capability.

To make the transition as smooth as possible from the loaded half-ton trucks to the 2500 and 3500 HD lines, the Denali trim comes along and now the All Terrain package (available of SLE and SLT) is also making the leap into the heavy-duty realm.

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This includes aluminum skidplates, twin-tube Rancho shocks and a variety of All Terrain equipment to make sure the Sierra HD never loses its footing in the rough stuff.

The new 2015 Sierra HD All Terrain is arriving at dealers now with a standard 6.0-liter V8 engine or the available Duramax diesel, which is sure to be a popular addition to this rough and ready package. Available across both 2500HD and 3500HD models, the All Terrain equipment upgrades are sure to make your Sierra HD the biggest and toughest truck on the roads.

Standard 18-inch wheels are even upgradable to 20-inchers, but true ranchers and mountain men might want to stick with the taller sidewalls to avoid any flat tires when trying to find the Sierra HD All Terrain’s high, high limits on any off-road scenario!


The 2015 Canyon and 2014 Sierra 1500 also offer the All-Terrain upgrades, as shown below.

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2015 GMC Sierra All Terrain HD 2500

2015 GMC Sierra All Terrain HD 6

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Official Details below from GMC.


GMC Introduces 2015 Sierra All Terrain HD


DETROIT – GMC today introduced the 2015 Sierra All Terrain HD, a refined, off-road-inspired execution of the brand’s capability that blends exclusive design features with the versatility of 4WD. It goes on sale this summer.


“The new 2015 GMC Sierra HD lineup helps customers tackle tough jobs more comfortably, and with the new All Terrain HD, they can do it with greater style,” said Duncan Aldred, vice president of GMC Sales and Marketing. “Equally comfortable whether it’s a night on the town or traversing a remote job site, it has all the capability customers demand from a GMC heavy-duty truck on the job.”

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The new Sierra All Terrain HD is available on 2500HD and 3500HD double cab and crew cab models, and offered with SLE or SLT trims – all with 4WD, of course, including an electronically controlled transfer case. Also included is the Z71 Off Road package, with Rancho twin-tube shocks, hill descent control and a skid plate.


Sierra HD’s 6.0L gas engine is standard and the Duramax turbo-diesel is available.


The All Terrain’s exclusive design features include a chrome surround on the grille, exterior graphics, aluminum underbody shields and unique 18-inch six-spoke chrome cast-aluminum wheels. Twenty-inch chrome aluminum wheels are available on 2500HD, while 3500HD models also include adjustable outside camper mirrors with a chrome cap.


Additional exterior content includes light-emitting diode signature headlamps, body-color bumpers (chrome bumpers available), chrome mirrors covers and body side moldings and chrome front-lower bumper plate. Inside, a carbon fiber-inspired theme distinguishes the All Terrain from other models and includes the ALL TERRAIN logo on the instrument cluster. A rearview camera system also is standard.


The new All Terrain HD also includes the latest connectivity technology, including IntelliLink and new OnStar with 4G LTE and standard built-in Wi-Fi hotspot. Enhanced features for IntelliLink include Text Messaging Alerts for smartphone users with Bluetooth profile (M.A.P.), which reads incoming texts through the vehicle’s speakers, and Siri Eyes Free for iPhone iOS 6 and iOS 7 users to enhance connectivity and convenience.


New OnStar with 4G LTE connection provides a mobile hub for drivers and passengers to stay connected. The hotspot is on whenever the vehicle is on and comes with a three-month/three-gigabyte data trial.

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Additional new and enhanced features introduced on the 2015 Sierra HD lineup include:

  • CornerStep rear bumper, EZ Lift and Lower tailgate, standard locking tailgate, standard upper tie-downs and other features that make cargo handling easier

  • Standard StabiliTrak with Trailer Sway Control on all models

  • Integrated cruise control, auto grade braking and diesel exhaust braking, for greater driving control and reduced brake wear on grades

  • Enhanced cooling airflow, which enables the Duramax turbo diesel and 6.0L gas engine to better maintain full power, even under heavy loads and high ambient temperatures

  • New Duralife™ disc brake rotors that offer up to double the service life (late availability).


New, heated, power-adjustable trailering mirrors are offered on SLE and SLT – including All Terrain – and Denali (late availability), including segment-first back-up lamps. The large mirrors feature 51 square inches of flat mirror surface positioned over a 24.5-square-inch convex mirror surface (convex area not heated or power-adjustable). A new auxiliary back-up lamp is integrated in each mirror to enhance trailer visibility when backing up, as well as an amber auxiliary clearance lamp. The SLE trailering mirror is black and can be extended and folded manually. The SLT/Denali mirror has a chrome cap and adds a power-folding feature.


The 2015 Sierra HD also offers segment-exclusive safety features such as forward collision alert, lane departure warning with an active safety seat, and front and rear park assist. Head-curtain and seat-mounted side airbags are standard on 2500HD and available on 3500HD models.


All models are backed by GMC Pro Grade Protection, with two years of scheduled maintenance – including diesel exhaust fluid – a three-year/36,000-miles bumper-to-bumper warranty and a five-year/100,000-mile powertrain warranty.


GMC has manufactured trucks since 1902, with innovation and engineering excellence built into all GMC vehicles. The brand is evolving to offer more fuel-efficient trucks and crossovers, including the Terrain small SUV and Acadia crossover. GMC’s highest-volume vehicle, the Sierra pickup, is the most powerful light-duty pickup on the market, and the first full-size pickup to receive the highest-possible five-star Overall Vehicle Score for safety since the National Highway Traffic Safety Administration changed its New Car Assessment Program for the 2011 model year. Details on all GMC models are available at http://www.gmc.com/, on Twitter at @thisisgmc or at http://www.facebook.com/gmc.