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2011 GMC Sierra 2500 HD Denali Duramax Start Up, Exhaust, In Depth Tour/Review, and Test Drive

In this video I give a full in depth tour of the 2011 GMC Sierra Denali 2500 HD. It has the newest variant of the 6.6L turbo diesel duramax engine, now quieter ...

  • 2011gmcsierra2500hddenali 2011gmcsierra2500hddenalidallas 2011gmcsierra2500hddenaliftworth 2011gmcsierra2500hddenalidealer 2011gmcsierra2500hddenalijameswood

    Smooth Bed in the All New 2011 GMC Sierra 2500HD Denali at James Wood Decatur and Denton

    Smooth Bed in the All New 2011 GMC Sierra 2500HD Denali Diesel at Dallas Ft Worth GMC Dealer James Wood Decatur and Denton. All 2011 HD GM Truck Frames are Pre-Drilled from the factory for 5th-wheel trailer hitches....

    Photo by jameswoodmotors on Flickr

  • truck diesel pickup sierra hd denali gmc 2500 heavyduty duramax 2011

    2011 GMC Sierra 2500 Denali

    Photo by Alex Nunez on Flickr

  • truck diesel pickup sierra hd denali gmc 2500 heavyduty duramax 2011

    2011 GMC Sierra 2500 Denali

    Photo by Alex Nunez on Flickr

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    2011 GMC Sierra Denali HD

    2011 GMC Sierra Denali HD

    Photo by dan_tobin on Flickr

  • truck diesel pickup sierra hd denali gmc 2500 heavyduty duramax 2011

    2011 GMC Sierra 2500 Denali

    Photo by Alex Nunez on Flickr

  • auto wheel drive media limo sierra nomad clutch hd denali gmc 2500 truckfour denali2011 clutchmag clutchautomag magazinegmc duramax2011 denaligmc2500duramaxpink magglobal grouptruckblack

    2011 GMC Sierra 2500 HD Denali Duramax

    Shot By Justin Engel of Open Up Photography for Global Nomad Media Group

    Photo by Open Up Photo on Flickr

  • auto wheel drive media limo sierra nomad clutch hd denali gmc 2500 truckfour denali2011 clutchmag clutchautomag magazinegmc duramax2011 denaligmc2500duramaxpink magglobal grouptruckblack

    2011 GMC Sierra 2500 HD Denali Duramax

    Shot By Justin Engel of Open Up Photography for Global Nomad Media Group

    Photo by Open Up Photo on Flickr

  • auto wheel drive media limo sierra nomad clutch hd denali gmc 2500 truckfour denali2011 clutchmag clutchautomag magazinegmc duramax2011 denaligmc2500duramaxpink magglobal grouptruckblack

    2011 GMC Sierra 2500 HD Denali Duramax

    Shot By Justin Engel of Open Up Photography for Global Nomad Media Group

    Photo by Open Up Photo on Flickr

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    2011 GMC Sierra Denali HD

    2011 GMC Sierra Denali HD. X11GM_SH010 (3/10/2010)

    Photo by Dueck Auto Group on Flickr

  • 2011 GMC Sierra HD 2500 Denali 4x4 Diesel

    11/12/11, via Car and Driver

    To that end, the 2011 GMC Sierra Heavy Duty—along with its Chevrolet Silverado twin—sees a couple of its key numbers swell to 6635 and 21,700. Those are the highest payload and trailer-weight capacities of the GM HD trucks; the totals for the 2500

  • 2015 GMC Sierra 2500 HD Denali 4x4 Crew Cab

    07/14/14, via Car and Driver

    The 2015 GMC Sierra HD and Chevrolet Silverado HD share their light-duty brethren's improvements, and GMC says one out of every four HD trucks it sells is a crew-cab-only Denali model. The Denali amplifies the lesser Sierra's industrial-chic styling

  • 2015 GMC Sierra 2500 / 3500 HD

    12/07/13, via Car and Driver

    The Sierra HD's industrial-chic styling works well with its blocky silhouette, with additional brightwork and details versus the Silverado, such as plastic trim guarding the wheel arches. GMC says one of every four HD truck buyers opts for the chromed

  • GMC Shows Us How To Adjust The Electronic Trailer Brake Controller: Video

    03/17/15, via GM Authority (blog)

    The GMC Sierra full-size pickup was made for hauling; if you own one, chances are strong that at some point, you'll be barreling through the countryside with a boat, a camper, or some other trailered cargo secured to the back end. In this video from

  • GMC Explains How Its Diesel Exhaust Brake Technology Works To Reduce Brake ...

    03/18/15, via GM Authority (blog)

    Today, GMC has put together a brief presentation on how its exhaust brake technology works to assist the driver while piloting the Sierra HD diesel. What the technology does is assist the truck in stopping while descending down hills to reduce the

  • What Makes GMC's Denali Trim So Great?

    05/01/15, via

    The Denali vehicle lineup made up 21 percent of all GMC vehicles sold in February 2015 (up 3 percent versus January). Nearly 12 percent of all light-duty Sierra trucks sold have the Denali trim, and this number is rising according to GMC truck

  • 2017 GMC Sierra 1500 Spied With Covered Fascias

    04/22/15, via GM Authority (blog)

    Formally introduced to world before the 2013 North-American International Auto Show in December 2012, alongside its mechanically identical brethren from Chevrolet, the current GMC Sierra 1500 is still considered fairly new, being just two model years old.

  • GMC Sierra HD Review: 2011 GMC Sierra 2500 Denali Test ...


    Numbers are an obsession in the auto industry. Corporate suits worry about build costs, profit margins, and sales volumes; sports-car fans spend more time watching horsepower counts, acceleration times, and top speeds. But heavy-duty truck enthusiasts live and die by numbers, perhaps more than any other segment of the automotive sphere.

    To that end, the 2011 GMC Sierra Heavy Duty—along with its Chevrolet Silverado twin—sees a couple of its key numbers swell to 6635 and 21,700. Those are the highest payload and trailer-weight capacities of the GM HD trucks; the totals for the 2500 truck tested here are 2631 and 16,800 pounds, respectively. But when we finished putting this GMC Sierra Denali 2500 through its paces, it wasn’t these digits that had our spreadsheets smoking.

    Quick for a Big Guy

    Indeed, a thoroughly overhauled Duramax turbo-diesel V-8 supplies the first pair of staggering numbers: 397 and 765. Those are the 6.6-liter engine’s respective hp and torque counts, the former peaking at 3000 rpm and the latter at 1600. Those two figures delivered the digits that simply blew us away—7.3 and 15.7, as in stopwatch ticks to 60 mph and through the quarter-mile, the latter feat occurring at 89 mph. What we have here is a 7560-pound truck that’s quicker than the first Chevy Camaro we ever tested and capable of hauling most of one in the bed or towing four behind it on a trailer.

    Credit for this quickness is also due to the six-speed Allison automatic transmission, which keeps the Duramax spinning at the absolute peak of its prodigious power band while shifting with relative smoothness. (In contrast, the hard-shifting automatic in our long-term Ram 2500 changes gears as though it were trying to rip itself apart.) Most of the Sierra driving experience is similarly pleasant. The steering is nicely weighted and direct without being so nervous as to cause concerns about stability with a trailer aft. The brake pedal, too, feels surprisingly firm and communicative for one meant to be stomped on by work-booted feet and actuating a system responsible for halting 10 tons. Our haul down to 0 from 70 mph took 217 feet, which seems to be the standard for HD trucks, regardless of manufacturer: Of the five we’ve tested in recent months, all are clustered between 217 and 222 feet.

    The Sierra is not without its flaws, however. Although a suspension designed to accommodate a one-ton payload atop the shoulders of a four-ton truck is never going to be compliant, there’s a difference between unyielding and uncivilized. Small impacts jostle occupants, but over larger impacts, the front axle feels detached, like it’s rattling in its bushings. “Unfinished” is hardly a confidence-inspiring vibe to get from a work truck.

    Huge Truck, Disappointing Rear Legroom

    Our other major complaint centers on the interior, where we encountered the Sierra’s first—and seemingly only—inadequate number. Despite the truck’s 240.1-inch overall length and 78.3-inch height, the back seat of the cab is snug in one key dimension. With legroom not even 1.5 inches greater than that found in the back seat of a Chevy Malibu (39.0 versus 37.6), even shorter staffers found the Sierra’s rear perch lacking. Ford’s F-series Super Duty crew cab offers 3.1 more inches than the Sierra (42.1), and in Mega Cab trim, the HD Ram offers enough interior space for the Detroit Pistons’ starting lineup.

    Additionally, although the Denali package spruces up the interior, it doesn’t do anything about the low quality of the plastics. (At $1305 more than a similar Sierra SLT, the main benefit of the Denali package is the monochromatic exterior appearance.) The black tuxedo treatment inside and out masks the cheapness somewhat, but the massive expanse of black plastic that forms the inner door looks low-budget, as does the lower dash panel. Not only that, but the materials feel hard and hollow.

    This interior might be passable in a base Sierra 1500 for $21,845, but in a truck that stickers at nearly three times that amount—our Sierra 2500 Denali came in at $61,244—it’s a glaring fault. Although the base price for a gasoline Denali HD is $46,860, the diesel option jolts the sticker north by $7195. The Allison transmission (broken out separately on the order form but mandatory with the diesel) is another $1200, bringing the base price of the diesel to $55,255. Our test example arrived with a navigation system ($2250), a sunroof ($895), 20-inch polished aluminum wheels ($850), chrome running boards ($689), heated and cooled front seats ($650), a rearview camera ($450), a heated steering wheel ($150), and a pair of engine covers for the grille and bumper opening that are required on diesel trucks sold in cold-weather states ($55).

    Pull My Trailer

    Although the total of $61,244 is an eye-opening number, that price is dead on with similarly outfitted and capable trucks from Ford and Dodge. (And remember that any less costly GM HD outfitted with this powertrain should prove equally well motivated.) From a numbers perspective, Ford still leads the HD truck segment with a max payload of 6520 pounds and a towing capacity of 24,400, as well as in diesel output, thanks to a recent upgrade to 400 hp and 800 lb-ft. However, despite the extra power, GM’s acceleration numbers embarrass a 2011 diesel F-250 we tested (8.0 seconds to 60 and 16.2 in the quarter at 86 mph). Most buyers aren’t drag-racing their 7600-plus-pound trucks—give yourself a high-five if you do and yours is in the 11s—but the Sierra’s fleetness means that, even with a gooseneck hanging off the back, it’ll be the Camry in the next lane that holds up traffic. Now if only GM could get serious about things not so easily quantified, such as ride quality and interior finish.

    View Photos View Photos

    Highs and Lows Highs:

    Blazing speed (really!), drives well as long as the pavement stays smooth.


    Jittery over big bumps, interior doesn’t work in such a pricey truck.

  • 2011 GMC Sierra Denali HD | car review @ Top Speed

    General Motors unveils today details on the new 2011 Sierra Denali HD pick-up powered by a new 6.6L Duramax turbo diesel engine. It will be available exclusively for the 2500HD chassis, in a 4WD crew cab standard box configuration.

    The new Duramax 6.6 liter turbo diesel V-8 delivers a total of 397 hp at 3,000 rpm and 765 lb.-ft. of torque at 1,600 rpm. The 0-60 mph sprint will be made in less than 9 seconds and quarter-mile in less than 16 seconds in 2500HD models. The engine is mated to a new Allison 1000 six-speed automatic transmission.

    The new Sierra Denali HD is distinguished by a 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.

    Updated 04/09/2010: GMC today announced prices for the 2011 Sierra Heavy Duty Pickups that will go on sale this summer. Prices will start at $27,965 for the 2500 regular cab 2WD model and will go up to $45,865 for the Sierra Denali HD.

    Press release after the jump.

    Press release

    GMC today announces the new 2011 Sierra Denali HD, the first offering of the exclusive Denali line on a heavy-duty GMC pickup. The Sierra Denali HD leads a comprehensively redesigned lineup of 2011 Sierra 2500HD and 3500HD trucks that go on sale in early summer – including the most powerful diesel engine in the segment.

    Sierra HD’s new 6.6L Duramax turbo diesel 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 15,600 pounds with the segment’s most powerful diesel – that’s enough to tow a 34-foot-long, three-axle travel trailer.”

    GMC Sierra Denali HD

    The Sierra Denali HD comes exclusively on the 2500HD chassis, in a 4WD crew cab standard box configuration. 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.

    The iconic Denali four-bar, chrome grille with round air inlets distinguishes the Sierra Denali HD on the outside, along with body-color bumpers, chrome door handles, chrome accents and 18- and 20-inch polished forged aluminum wheels.

    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. Highlights include:

    Increased towing capability (20,000 lbs./9,072 kg) and payload (6,335 lbs./2,873 kg) supported by all-new fully-boxed, high-strength-steel frames and strong suspensions for maximum capability and exceptional ride characteristics Five of the 12 3500HD models offer a payload capability greater than 6,000 pounds vs. Ford Super Duty’s single model greater than 6,000 pounds Thirteen of the 22 2500HD models offer a payload capability greater than 3,100 pounds vs. Ford Super Duty’s single model greater than 3,100 pounds New 6.6L Duramax diesel delivers segment-best power, up to 11-percent greater highway fuel economy, up to 63-percent lower emissions, B20 biodiesel capability and quicker acceleration Larger gas tank and fuel economy improvements allow up to 680 miles (1,090 km) between fill-ups with the 6.6L Duramax turbo diesel All-new “smart” exhaust brake feature provides greater control on grades and reduced brake pad wear An array of control features, including trailer sway control, integrated trailer brake control, hill start assist, automatic grade braking, intelligent brake assist and larger brakes Purposeful technology, including available mobile WiFi, USB connectivity, Bluetooth connectivity, XM Satellite Radio, OnStar 9.0 and navigation. GMC Sierra Denali HD

    “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 the segment-best diesel power to the segment-best warranty, these trucks deliver strength and peace of mind on all fronts.”

    Following are details of the new and redesigned product features of the Sierra Denali HD and the other Sierra 2500HD and 3500HD models.

    The Sierra HD lineup brings greater capability.

    The details: Depending on the model, Sierra HD models offer:

    Increased fifth-wheel towing capacity of 20,000 pounds (9,072 kg) Conventional towing capacity increases up to 23 percent, with a maximum of 16,000 pounds (7,272 kg) Improved payload capability of 6,335 pounds (2,873 kg) on a complete vehicle Gross Combined Weight Rating increases to 27,500 pounds (12,500 kg) Gross Vehicle Weight Ratings increases up to 17 percent to 13,000 pounds (5,909 kg) Front Axle Weight Rating increases by up to 25 percent to 6,000 pounds (2,721 kg) Snow plow capability for all 4WD cab configurations. GMC Sierra Denali HD

    “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.”

    The new 2011 Sierra Denali pairs capability with premium features.

    The details: The new Sierra Denali HD is offered exclusively in the Crew Cab standard box configuration on the 2500HD chassis, providing a spacious cabin with room for up to five. As with other Denali models, including the new Acadia Denali, the cabin is unique with standard premium touches. It includes 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.

    On the capability front, the Sierra Denali has a gross vehicle weight rating (GVWR) of 10,000 pounds (4,536 kg), a payload capacity of 2,959 pounds (1,342 kg) and a maximum trailering rating of 15,600 pounds (7,076 kg) with a fifth-wheel hitch. The maximum conventional hitch trailering rating is 13,000 pounds (5,897 kg).

    Engineers developed 11 all-new, fully boxed frame assemblies to improve durability and ride characteristics and support increased capabilities.

    GMC Sierra Denali HD

    The details: 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 16,000 pounds (7,257 kg).

    Sierra HDs feature a new, stronger independent front suspension – enabling snow plow installation on all 4WD models.

    The details: 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. 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.

    GMC Sierra Denali HD

    COMPETITIVE FACTS: 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.

    A new asymmetrical leaf-spring rear suspension supports greater loads.

    The details: 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. 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, with more capable ride, handling and steering.

    GMC Sierra Denali HD

    The details: 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. Also enhancing the driving experience is a revised steering system designed to support the trucks’ greater front gross axle weight rating. 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.

    The new 6.6L Duramax turbo diesel delivers segment-leading torque and up to 63-percent lower NOx emissions; and is B20-capable.

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

    NOx emissions reduced at least 63 percent over 2010 models Quieter operation High-pressure (30,000 psi/2,000 bar) Piezo-actuated fuel system for greater fuel efficiency, improved performance and reduced emissions “Smart” exhaust brake feature that enables controlled vehicle slowdown on downhill grades without actuating the brakes Selective catalytic reduction after-treatment system using diesel exhaust fluid (DEF) injection to provide the best overall diesel characteristics and performance – with a range of about 5,000 miles (8,000 km) between DEF refills Combustion and after-treatment have been optimized to provide about 700 miles (1,125 km) between diesel particulate filter regenerations – a 75-percent improvement over the previous system and a significant contributor to improved fuel efficiency, as the regeneration process requires additional fuel B20 biodiesel capability for an alternative fueling option Internal revisions that improve durability. GMC Sierra Denali HD

    With nearly 1.3 million Duramax 6.6L engines produced since 2000, they have proven exceptionally durable and dependable. The internal elements that helped build its reputation are enhanced for 2011, including:

    Main bearings’ profiles changed to enhance oil film thickness Oil pump flow increased for increased pressure at low speeds Modified turbocharger oil circuit for increased pressure at the turbo and faster oil delivery The connecting rods’ pin ends are modified to provide increased piston support New, higher-strength piston design that eliminates bushings to provide lower reciprocating weight An EGR cooler bypass reduces high-mileage soot deposits in the cooler and EGR circuit.

    COMPETITIVE FACTS: Compared with Ford Super Duty’s urea-based system, 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 – a better capability than Ford’s.

    New Allison 1000 six-speed automatic transmission works with the Duramax 6.6L to deliver greater fuel economy, quicker acceleration, greater towing capability and exhaust brake system.

    The details: 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.

    GMC Sierra Denali HD

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

    The details: 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.

    The 6L90 is enhanced for greater strength, smoothness and quietness via:

    Adding four attachment bosses to the transfer case adapter (4WD models) for increased strength and smoother, quieter performance Increasing the cross section size of the transfer case adapter for greater strength Adding a new, stronger output shaft Adding a new heat shield and vent hose.

    COMPETITIVE FACTS: Ford’s new Super Duty models share the same transmission between their gas and diesel engines. Sierra HDs’ Allison 1000 and Hydra-Matic 6L90 transmission were developed for the specific horsepower, torque and operating range differences that distinguish the diesel and gas engines.

    Brake feel and performance is greatly improved.

    GMC Sierra Denali HD

    The details: 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 hydroboost brake booster calibration is revised for reduced pedal effort, and the travel of the pedal is also revised for 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.

    Sierra HD’s ‘smart’ exhaust brake feature provides greater control and reduces brake pad wear.

    The details: 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.

    Comprehensive safety features and functional technologies include trailer sway control system and hill start assist.

    The details: The 2011 Sierra 2500HD and 3500HD models have a comprehensive roster of safety features and functional technologies that include:

    StabiliTrak electronic stability control system on all single-rear-wheel models Larger, four-wheel disc brakes with standard four-wheel ABS A new high-strength steel tubular frame cross member that enhances safety and improves crashworthiness Seat pelvic/thorax and head curtain side air bags available on 2500HD Available rear backup camera Segment-exclusive OnStar 9.0 Trailer sway control system on all single-rear-wheel models Hill start assist (standard on single-rear-wheel models) GMC Sierra Denali HD

    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. 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.

    The GMC Sierra HD lineup is broader than ever.

    The details: For 2011, the Sierra heavy-duty lineup expands to include 11 2500HD models and eight 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.

    Sierra HD professional-grade interiors are refined and well-appointed – and ready to work.

    The details: From the available remote starting feature to the unimpeded access offered by the 170-degree-opening rear access doors on extended cab models, the 2011 Sierra HD models reflect the professional grade blend of refinement and functionality for which GMC is known. 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.

    GMC 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.Sierra HDs are ready for the long haul – and the cold.

    The details: 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 2011 Sierra HD lineup has the best warranty coverage in America.

    The details: 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.

    Gallery GMC Sierra Denali HD

  • Used 2011 GMC Sierra 2500HD Pricing & Features | Edmunds

    This is the estimated average annual insurance premium being charged in your state. The premium has been determined based on annual premium data for defined coverages (liability, comprehensive and collision) from a major insurer.

    While this information is specific to vehicle make, model, model year and body type, your personal information is not taken into consideration and could greatly alter the actual premium quoted by an insurer. Factors that will affect your rate include your age, marital status, credit history, driving record, and the garaging address of your vehicle.

    The Edmunds TCO® estimated monthly insurance payment for a 2011 GMC Sierra 2500HD in NJ is:

    $170.50 per month*


  • 2015 Sierra 2500 Denali Heavy Duty Pickup Trucks - GMC

    *Premium color available at additional cost.

    1. The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges.

    2. Not compatible with all devices.

    3. Full functionality requires compatible Bluetooth® and smartphone. Some devices require USB connectivity.

    4. Visit to see which phones are compatible with each vehicle.

    5. Devices must be WPA2 compliant with active OnStar service and data plan. Wi-Fi devices manufactured prior to 2006 may not be compatible. Please consult your device manufacture for information regarding the WPA2 security protocol and Wi-Fi device compatibility. Visit for details and system limitations. 4G LTE is available only on select 2015 models. Applies to Sierra HD Crew cabs produced on or after August 25, 2014 or Sierra HD Double and Regular Cabs produced after September 1, 2014

    6. GM reported full-size pickup and van fleet and retail vehicle deliveries, Vehicle Model Year 2000-2014 through August 2013.

    7. Based on GM testing and fuel tank capacity. Your range may be less.

    8. Applies to Sierra HD Crew cabs produced on or after August 25, 2014 or Sierra HD Double and Regular Cabs produced after September 1, 2014

    9. Requires 2500 Denali HD Regular Cab 2WD with available Performance Package and 6.0L Vortec V8 engine. Maximum payload capacity includes weight of driver, passengers, optional equipment and cargo.

    10. Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers, and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

    11. Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo.

    12.Visit for details and system limitations. OnStar acts as a link to existing emergency service providers.

    13. Map coverage not available in Puerto Rico, the Virgin Islands. and portions of Canada.

    14. Covers only scheduled oil changes with filter and tire rotations according to your new vehicle’s recommended maintenance schedule for up to two years or 24,000 miles, whichever comes first. Does not include air filters. Maximum of 4 service events. Take delivery after 06/01/13. See participating dealer for other restrictions and complete details.

    15. Whichever comes first. See dealer for limited warranty details.

  • 2011 gmc sierra 2500 denali | eBay

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  • 2011 GMC Sierra 2500 HD Pickup-V8 - NADAguides

    © Copyright 2015 National Appraisal Guides, Inc., all rights reserved. National Appraisal Guides, Inc. is a strategic ally of NADA Services Corporation.   © NADASC 2015, all rights reserved. NADASC Valuation Data is used under license from NADASC.     

2011-gmc-sierra-hd-denali-4x4-cover-photo | See more about Gmc Denali, 4x4 and Sexy Ass. - 08/25/15, @arudyqol
2011-gmc-sierra-hd-denali-4x4-cover-photo | See more about Gmc Denali, 4x4 and Sexy Ass. - 08/25/15, @arudyqol
2011 GMC Sierra 2500 HD Denali Duramax Start Up, Exhaust, In ... #supercar #car #sportcar 08/24/15, @Logannew35
  • 2016 GMC Sierra HD unveiled with minor updates

    08/26/15, via World Car Fans

    GMC has announced a series of updates ... Trim levels include a Sierra base model (1SA trim), as well as SLE, SLT and Denali, which accounts for approximately half of Sierra HD crew cab retail sales It matches capability with an exclusive package of ...

  • 2015 GMC Sierra 1500 Denali - Driven

    08/26/15, via TopSpeed

    Like the Denali and Limited trims, the Laramie Limited is also offered on the heavy-duty trucks. Read more about the 2016 Ram 1500 Laramie Edition here . Though on the expensive side, the GMC Sierra Denali proves that luxury doesn’t have to be confined ...

  • 2016 GMC Sierra HD Lineup Hauls In New Features And Technology

    08/24/15, via GM Authority

    All Terrain and Denali trims. Now, GMC has revealed what’s in store for the 2016 Sierra HD family of trucks. The 2016 GMC Sierra HD, which includes the 2500 and 3500 variants, features the same refreshed design as seen on its standard-duty siblings but ...

  • 2016 GMC Sierra HD Gets New Technologies

    08/22/15, via Carscoops

    GMC ... or Denali). The GMC IntelliLink infotainment system adds a new HD radio as well as performance improvements including a faster processor for better performance and Apple CarPlay and Android Auto capability. In addition, the 2016 GMC Sierra HD ...

  • For sale in Frankfort KY

    08/21/15, via

    All Around gem!! 4 Wheel Drive, never get stuck again*** Drive this wonderful 2015 GMC Sierra 2500HD Denali home today. New Arrival... Safety equipment includes: ABS, Traction control, Curtain airbags, Passenger Airbag, Front fog/driving lights...

  • 2011 GMC DENALI HD

    08/19/15, via Louisiana Sportsman

    Avoid scams, deal with people locally. Beware of people who want to wire money, use cashiers checks, money orders, or want to drop ship products. Learn more here. Classified ads are posted by individuals as is, with no guarantees by this site. We will not ...

  • 2011 GMC 2500 SLE

    08/19/15, via KSL

    Really clean 2011 Z71 GMC Sierra 2500HD SLE DIESEL. I'm the second owner. It runs perfect and is super clean. This truck has tons of life left the miles are 90% freeway miles. All the regular maintenance has been done to this truck on schedule. Everything ...

2011 GMC Sierra Denali HD review

Americans build big trucks!! That is an undisputed axiom in the automotive world. GMC thinks its new Sierra HD is one of the better big trucks. Bumper2Bumpertv recently tried one out and find it is not a vehicle for the timid.

Featured Products


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Auto Ventshade 322029 Aeroskin Flush Mount Dark Smoke Hood Protector for 2011-2014 GMC Sierra 2500HD, 3500HD by Auto Ventshade

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VioGi Fit 07-13 GMC Sierra 1500 Denali New Body Style (Except 07 Classic & 2500/3500 Heavy Duty) 1pc ABS Plastic Chrome Lower Bumper Round Hole Mesh"Denali" Style Grille by VioGi

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07-18 Chevy Silverado ; GMC Sierra 1500/2500 / 3500 HD Denali Crew Cab MPH 4 inch Black Side Step Nerf Bars Rail Running Board by MPH Production

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Grille Compatible With 2007-2013 GMC Sierra 1500 Denali, ABS Plastic Chrome Front Lower Grill Grille By IKON MOTORSPORTS, 2008 2009 2010 2011 2012 by IKON MOTORSPORTS

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Tail Light Assembly Compatible with 2011-2014 GMC Sierra 2500 HD / 3500 HD Denali Model Type 2 - CAPA Passenger Side by Evan Fischer

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ZMAUTOPARTS For GMC Sierra 15 25 35 Hd Denali Bumper Driving Fog Lights Smoke by ZMAUTOPARTS

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SCITOO Side View Mirror Driver Side Mirror Fit Compatible with 2007-2013 for Chevy Silverado 1500 2500 HD 3500 HD for GMC Sierra 1500 2500 HD for GMC Yukon/Yukon XL 1500 Power Power Folding Heated by SCITOO

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Fit System Driver Side Mirror for Avalanche, Silverado/Sierra 1500, 2500, 3500, Suburban, Tahoe, Yukon/Denali/XL, Silverado/Sierra Hybrid, Arrow Signal, Memory, Power Fold, Heated Power (62152G) by Fit System

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Off Roader eGrille Fits 2007-2013 GMC Sierra Denali 1500 Stainless Billet Grille Insert by Off Roader

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