Home / Auto News / News article: 2011 GMC Sierra Denali Heavy Duty Announced With Class-Leading Horsepower and Torque - AutoGuide.com News
 |  Mar 10 2010, 10:56 AM

X11GM_SH010.jpg

A month after the debut of the all-new 2011 Chevy Silverado HD, GMC has now announced its version of the work truck, the Sierra Denali HD. Powered by the same 6.6-liter Duamax engine and 6-speed Allison transmission, the truck gets best-in-class power of 397-hp at 3000 rpm and best-in-class torque of 765 ft-lbs at 1600 rpm. This tops the new Ford F-Series, but only slightly, while coming slightly under the new Ford truck in both payload and tow ratings, with a 6,335 lb. and 20,000 lb rating, respectively. The trucks conventional (non-fifth-wheel) towing cappability is up significantly, to the tune of 23 percent, and is now rated at 16,000 lbs.

The engine block itself is a carry-over from the past model but the majority of moving engine parts are new, as is the entire fuel system. NOx emissions are also down 63 percent thanks in part to an exhaust after treatment system that is used because it won’t interfere with the engine’s ability to create power. The Diesel Exhaust Fluid (DEF) used in the process does require refilling every 5,000 miles. In addition, the new engine is B20 biodiesel capable.

As for the new Allison transmission it has been strengthened to work with the added torque of the new engine and features an optional exhaust brake, Power Take Off and a Driver Shift Control (DSC). It’s also designed to work with the new Duramax engine to give improved fuel economy by 11 percent and GMC says to expect a fuel range of 680 miles on the new 36 gallon tank.

In addition to the fuel economy improvements, GMC claims improved acceleration with Duramax/Allison combo, resulting in a 0.3-second improvement to 60 mph and a 0.5-second improvement in the quarter-mile for a rating of less than 9 and less than 16 seconds respectively.

Like it’s Chevy counterpart, the Sierra gets a new front suspension with forged steel upper control arms and cast iron lower control arms with the new front independent suspension now delivering a 25 percent improved front axle weight rating. The new 6,000 lb rating now means a snow plow can be used on all 4WD cab models equipped with the snow plow prep package. In addition, rather than a single torsion bar like on the previous model, the 2011 gets five different torsion bar rates for five different gross axle weight ratings, allowing height adjustability in accordance with the weight of a snow plow or other accessory.

As for the rear suspension, the leaf springs are now 20 percent wider, helping to improve the truck’s rear gross axle weight rating. Now 2500 models are rated to 6,200 lbs, while 3500 models get a 7,050 rating for single wheel or 9,375 of dualies. The new rear suspension is also designed to reduce wheel hop.

We could probably go on forever discussing the upgrades to the new 2011 Sierra HD, so we’ll try and wrap this up with a few more important things you should know. For 2011 the brakes are larger, measuring 14-inches at all four corners while the swept area of the brake pads has been increased with 13 percent more area covered on the front rotors and 17 percent more covered on the rear. Gone are 16-inch wheel fitments, with 17s now the new base wheel, while 20s can be had on the 2500HD.  Safety equipment includes StabiliTrak and Trailer Sway Control on all single-rear-wheel models as well as a new Hill Start Assist feature, that holds the truck for 1.5 seconds when leaving a stop on a hill. GMC also says that under heavy load it has reduced noise vibration and harshness (NVH) by as much as 30 percent.

Finally, let’s not forget the standard engine, a 6.0-liter Vortec V8 and six-speed 6L90 automatic transmission., It gets 360-hp at 5400 rpm and 380 ft-lbs of torque at 4200 rpm. A total of 90 percent of the engines torque is available from 2000 rpm allowing for a 13 percent increase in fifth-wheel towing for a total tow rating of 14,700 lbs.

GALLERY: 2011 GMC Sierra Denali HD

X11GM_SH001.jpgX11GM_SH003.jpgX11GM_SH007.jpgX11GM_SH008.jpgX11GM_SH011.jpgX11AR_GM003.jpg

Get all the 2011 GMC Sierra Denali HD details and model info after the jump:

PRESS RELEASE

Sierra Denali HD Leads New 2011 Sierra Heavy-Duty

ST. LOUIS, Mo. – 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.”

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 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.

“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.

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.

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.

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.

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.

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.

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)

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.

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.

About GMC

GMC is evolving to include more fuel-efficient trucks and crossovers. The GMC Terrain is a smaller SUV that offers 32 mpg highway fuel economy along with the capability, engineering expertise and refinement that have defined GMC for more than a century. Complementing the Terrain are the Acadia eight-passenger crossover, Yukon and Yukon XL and Sierra pickups. Today GMC is the only manufacturer offering three full-size hybrid models. Details on all GMC models are available at www.gmc.com.

SPECIFICATIONS
2011 SIERRA DENALI HD

Overview

Models: 2500HD Denali crew cab std. box, 4WD
Body style/driveline: 5-passenger crew cab; 3/4-ton; 4-wheel-drive heavy-duty pickup
Construction: Body on frame
EPA vehicle class: Full-size truck
Manufacturing location: Flint, Mich.
Key competitors: Ford Super Duty Series pickup, Ram heavy-duty pickup

Engines

Vortec 6.0L V-8 (L96) Duramax 6.6L Turbo Diesel V-8 (LML)
Type : 6.0L V-8 6.6L V-8
Displacement (cu in/cc): 364/5967 403/6599
Bore & stroke (in/mm): 4.00 x 3.62/101.6 x 92 4.06 x 3.9/103 x 99
Block material: Cast iron Cast iron
Cylinder head material: Cast aluminum Cast aluminum
Valvetrain: Overhead valve, two valves per cylinder, variable valve timing Overhead valve, four valves per cylinder
Ignition system: Coil-near-plug, platinum- tipped spark plugs, low-resistance spark plug wires Compression, glow plug start aid
Fuel delivery: Sequential fuel injection Direct injection diesel with high-pressure common rail
Compression ratio: 9.6:1 16.0:1
Horsepower
(hp/kW @ rpm):
360/268 @ 5400 397/296 @ 3000
Torque
(lb-ft/Nm @ rpm) :
380/515 @ 4200 765/1037 @ 1600
Recommended fuel: Regular unleaded Diesel or B20
Maximum engine speed (rpm): 6000 4800
Emissions controls: Six-speed automatic
(with Vortec 6.0L)
Cooled exhaust gas recirculation (EGR), EGR cooling-bypass system, diesel particulate filter system (DPF), selective catalyst reduction (SCR)

Transmissions

Hydra-Matic 6L90 Allison 1000
Type : Six-speed automatic
(with Vortec 6.0L)
Six-speed automatic
(with Duramax 6.6L)
Gear ratios (:1):
First: 4.03 3.10
Second: 2.36 1.81
Third: 1.53 1.41
Fourth: 1.15 1.00
Fifth: 0.85 0.71
Sixth: 0.67 0.61
Reverse: 3.06 4.49
Final drive ratio: 3.73 or 4.10 3.73

Chassis/Suspension

Front: All models: std long- and short-arm independent front torsion bar suspension
Rear: Semi-elliptic two-stage multi-leaf spring
Steering type: Integral power-assisted recirculating ball
Steering ratio: 16.1
Steering wheel turns, lock-to-lock: 3.57

Turning Circle

Turning circle, curb-to-curb (ft/m): 50.5/15.4

Brakes

Type: Power-assisted, Hydroboost brake-apply system, four-wheel disc, four-wheel ABS
Rotor diameter x thickness (in/mm): front: 13.97 x 1.57/355 x 40
rear: 14.17 x 1.34/360 x 34
Total swept area (sq in/sq cm): front: 277.7/1791
rear: 277.5/1790

Wheels/Tires

Wheel size and type: 18 x 8.0-in aluminum
20 x 8.5-in aluminum
Tire size: LT265/70R18 all-season
LT265/60R20 all-terrain

Dimensions
Exterior

Wheelbase (in/mm): 153.7/3904.4
Overall length (in/mm): 240.1/6100
Overall width (in/mm): 80/2032
Overall height: (in/mm): 78.3/1989.5
Track – front (in/mm): 68.8/1748
Track – rear (in/mm): 67.3/1709
Min. ground clearance (in/mm): front: 9.7/247
rear: 8.2/209
Step-in height (in/mm): 26/661

Weight and payload ratings

GVWR (lb/kg) Curb Weight (lb/kg) Payload (lb/kg)
Crew cab, std. box (4WD): 6.0L: 9500/4173
6.6L: 10000/4173
6.0L: 6377/2892
6.6L: 7208/3269
6.0L: 2959/1342
6.6L: 2792/1266

Cargo box

Cargo volume (cu ft/L): 60.7/1718
Length at floor (in/mm): 78.8/2003
Width at floor (in/mm): 62.4/1586
Tailgate width (in/mm): 61.5/1564
Width between wheel housings (in/mm): 50.6/1286
Inside height (in/mm): 21/533

Interior

Headroom (in/mm): front: 41.2/1048
rear: 40.5/1030
Legroom (in/mm): front: 41.3/1049
rear: 39/991
Shoulder room (in/mm): front: 65.2/1657
rear: 65.1/1655
Hip room (in/mm): front: 60.3/1532
rear: 65.4/1663

Capacities

Seating: 5
Fuel tank (gal/L): 36/136
Engine oil (qt/L): 6.0L: 6.0/5.7
6.6L: 10/9.5
Cooling system (qt/L): 6.0L: 16.4/15.5
6.6L: 25.4/24

Trailering

Trailer towing maximum with ball hitch (lb/kg) Trailer towing maximum with fifth-wheel hitch (lb/kg)
Sierra Denali HD: 6.0L (3.73 axle): 9300/4218
6.0L (4.10 axle): 13000/5897
6.6L (3.73 axle): 13000/5897
6.0L (3.73 axle): 9300/4218
6.0L (4.10 axle): 13700/6214
6.6L (3.73 axle): 15600/7076

*SAE certified.
Note: Information shown is current at time of publication.

SPECIFICATIONS

2011 SIERRA 3500HD

Overview

Models: 3500HD reg. cab, long box, 2WD & 4WD
3500HD ext. cab, long box, 2WD & 4WD
3500HD crew cab, long box, 2WD & 4WD
3500HD crew cab, std. box, 2WD & 4WD
Body style/driveline: 2-3 passenger regular cab or 5-6 passenger extended cab,
5-6-passenger crew cab
1-ton; 2- and 4-wheel-drive heavy-duty pickup
Construction: Body on frame
EPA vehicle class: Full-size truck
Manufacturing location: Flint, Mich., Ft. Wayne, Ind.
Key competitors: Ford Super Duty Series pickup, Ram heavy-duty pickup

Engines

Vortec 6.0L V-8 (L96) Duramax 6.6L Turbo Diesel V-8 (LML)
Type: 6.0L V-8 6.6L V-8
Displacement (cu in/cc): 364/5967 403/6599
Bore & stroke (in/mm): 4.00 x 3.62/101.6 x 92 4.06 x 3.9/103 x 99
Block material: Cast iron Cast iron
Cylinder head material: Cast aluminum Cast aluminum
Valvetrain: Overhead valve, two valves per cylinder, variable valve timing Overhead valve, four valves per cylinder
Ignition system: Coil-near-plug, platinum- tipped spark plugs, low-resistance spark plug wires Compression, glow plug start aid
Fuel delivery: Sequential fuel injection Direct injection diesel with high-pressure common rail
Compression ratio: 9.6:1 16.0:1
Horsepower
(hp/kW @ rpm):
360/268 @ 5400 < 10,000 GVWR
322/240 @ 4400 > 10,000 GVWR
397/296 @ 3000
Torque
(lb-ft/Nm @ rpm) :
380/515 @ 4200
(all models)
765/1037 @ 1600
Recommended fuel: Regular unleaded Diesel or B20
Maximum engine speed (rpm): 6000 4800
Emissions controls: Three-way catalytic converter, positive crankcase ventilation, evaporative collection system Cooled exhaust gas recirculation (EGR), EGR cooling-bypass system, diesel particulate filter system (DPF), selective catalyst reduction (SCR)

Transmissions

Hydra-Matic 6L90 Allison 1000
Type: 6-speed automatic (with Vortec 6.0L) 6-speed automatic (with Duramax 6.6L)
Gear ratios (:1):
First: 4.03 3.10
Second: 2.36 1.81
Third: 1.53 1.41
Fourth: 1.15 1.00
Fifth: 0.85 0.71
Sixth: 0.67 0.61
Reverse: 3.06 4.49
Final drive ratio: 3.73 or 4.10 3.73

Chassis/Suspension

Front: All models: std long- and short-arm independent front torsion bar suspension
Rear: Semi-elliptic three-stage multi-leaf spring
Steering type: Integral power-assisted recirculating ball
Steering ratio: 16:1
Steering wheel turns, lock-to-lock: 3.57

Turning Circle

Regular Cab Long Box Extended Cab Long Box Crew Cab Long Box Crew Cab Std. Box
Turning circle, curb-to-curb
(ft/m):
SRW: 44.9/13.7
DRW:45.6/13.9
SRW: 51.8/15.8
DRW: 52.8/16.1
SRW: 54.8/16.7
DRW:55.4/16.9
SRW: 50.5/15.4
DRW: N/A

Brakes

Type: Power-assisted, Hydroboost brake-apply system, four-wheel disc, four-wheel ABS
Rotor diameter x thickness
(in/mm):
front: 13.97 x 1.57/355 x 40
rear: 13.97 x 1.57/355 x 40
Total swept area (sq in/sq cm): front: 278/1793
rear: 278/1793

Wheels/Tires

Wheel size and type
Single rear wheels: 18 x 8.0-in steel
18 x 8.0-in aluminum
Dual rear wheels: 17 x 6.5-in steel
Tire size
Single rear wheels: LT265/70R18 all season or all terrain
Dual rear wheels: LT235/80R17 all season or all terrain

Dimensions
Exterior

Regular Cab
Long Box
Extended Cab
Long Box
Crew Cab
Std. Box
Crew Cab
Long Box
Wheelbase
(in/mm):
133.6/3395.4 158.1/4017.4 153.7/3904.4 167.7/4259.4
Overall length
(in/mm):
225/5716 249.5/6338 240.1/6100 259/6580
Overall width
(in/mm):
95.9/2436 95.9/2436 80/2032 95.9/2436
Overall height
(in/mm):
2WD: 77.3/1965
4WD:
77.2/1962
2WD:
77.4/1966
4WD:
77.3/1963
2WD:
77.4/1966
4WD:
77.4/1966
2WD:
77.8/1977
4WD:
77.8/1977
Track – front w/single rear wheels (in/mm): 68.8/1748 68.8/1748 68.8/1748 68.8/1748
Track – rear w/single rear wheels (in/mm): 67.3/1709 67.3/1709 67.3/1709 67.3/1709
Track – rear w/dual rear wheels (in/mm): 75/1906 75/1906 75/1906 75/1906
Minimum ground clearance – 2WD (in/mm): front: 9.9/52.2
rear: 8.8/224
front: 9.6/246
rear: 8.6/219.5
front: 10/255.4
rear: 8.4/213.3
front: 9.6/245
rear: 8.5/215
Minimum ground clearance – 4WD (in/mm): front: 9.9/252
rear: 8.6/218
front: 9.6/44.5
rear: 8.4/214.5
front: 9.9/53.5
rear: 8.4/214.4
front: 9.6/244
rear: 8.5/215
Step-in height (in/mm): 26/660 25.8/655 25.2/642 25.4/647

Weight and payload ratings

GVWR (lb/kg) Curb Weight
(lb/kg)
Payload (lb/kg)
Reg cab, long box (2WD) with single rear wheels: 6.0L: 10400/4717
6.6L: N/A
6.0L: 5808/2634
6.6L: N/A
6.0L: 4592/2083
6.6L: N/A
Reg cab, long box (2WD) with dual rear wheels: 6.0L: 12500/5670
6.6L: N/A
6.0L: 6165/2796
6.6L: N/A
6.0L: 6335/2873
6.6L: N/A
Reg cab, long box (4WD) with single rear wheels: 6.0L: 10700/4853
6.6L: 11400/5171
6.0L: 6134/2782
6.6L: 6919/3138
6.0L: 4566/2071
6.6L: 4481/2032
Reg cab, long box (4WD) with dual rear wheels: 6.0L: 12800/5806
6.6L: 13000/5897
6.0L: 6492/2944
6.6L: 7277/3301
6.0L: 6308/2861
6.6L: 5724/2596
Ext cab, long box (2WD) with single rear wheels: 6.0L: 10700/4853
6.6L: 11200/5080
6.0L: 6303/2859
6.6L: 6991/3171
6.0L: 4397/1994
6.6L: 4209/1909
Ext cab, long box (2WD) with dual rear wheels: 6.0L: 13000/5897
6.6L: 13000/5897
6.0L: 6668/3024
6.6L: 7460/3384
6.0L: 6332/2872
6.6L: 5540/2513
Ext cab, long box (4WD) with single rear wheels: 6.0L: 11000/4989
6.6L: 11600/5261
6.0L: 6580/2984
6.6L: 7377/3346
6.0L: 4420/2005
6.6L: 4223/1915
Ext cab, long box (4WD) with dual rear wheels: 6.0L: 13000/5897
6.6L: 13000/5897
6.0L: 6945/3150
6.6L: 7742/3511
6.0L: 6055/2746
6.6L: 5258/2385
Crew cab, long box (2WD) with single rear wheels: 6.0L: 10700/4853
6.6L: 11400/5171
6.0L: 6414/2909
6.6L: 6984/3168
6.0L: 4286/1944
6.6L: 4416/2003
Crew cab, long box (2WD) with dual rear wheels: 6.0L: 13000/5897
6.6L: 13000/5897
6.0L: 6777/3074
6.6L: 7544/3422
6.0L: 6223/2822
6.6L: 5456/2475
Crew cab, long box (4WD) with single rear wheels: 6.0L: 11000/4989
6.6L: 11600/5261
6.0L: 6732/3053
6.6L: 7516/3409
6.0L: 4268/1936
6.6L: 4085/1853
Crew cab, long box (4WD) with dual rear wheels: 6.0L: 13000/5897
6.6L: 13000/5897
6.0L: 7095/3218
6.6L: 7878/3573
6.0L: 5905/2678
6.6L: 5122/2323
Crew cab, std. box (2WD) with single rear wheels: 6.0L: 10500/4762
6.6L: 11100/5034
6.0L: 6300/2857
6.6L: 7063/3203
6.0L: 4200/1905
6.6L: 4038/1831
Crew cab, std. box (4WD) with single rear wheels: 6.0L: 10800/4899
6.6L: 11500/5216
6.0L: 6573/2981
6.6L: 7335/3327
6.0L: 4227/1917
6.6L: 4165/1889

Cargo box

Standard Box Long Box
Cargo volume (cu ft/L): 60.7/1718 75.5/2138
Length at floor (in/mm): 78.8/2003 97.7/2483
Width at floor (in/mm): 62.4/1586 62.4/1586
Tailgate width (in/mm): 61.5/1564 61.5/1564
Width between wheel housings
(in/mm):
50.6/1286 50.6/1286
Inside height (in/mm): 21/533 21/533

Interior

Regular Cab Extended Cab Crew Cab
Headroom (in/mm): 41.2/1048 front: 41.1/1044 front: 41.2/1048
rear: 39.4/1002 rear: 40.5/1030
Legroom (in/mm): 41.3/1049 front: 41.3/1049 front: 41.3/1049
rear: 34.3/872 rear: 39/991
Shoulder room (in/mm): 65.2/1657 front: 65.2/1657 front: 65.2/1657
rear: 65.3/1658 rear: 65.1/1655
Hip room (in/mm): 60.3/1532 front: 60.3/1532 front: 60.3/1532
rear: 61.8/1571 rear: 65.4/1663

Capacities

Regular Cab Extended Cab Crew Cab
Seating: 2/3 5/6 5/6
Fuel tank (gal/L): 36/136 36/136 36/136
Engine oil (qt/L): 6.0L: 6.0/5.7
6.6L: 10/9.5
6.0L: 6.0/5.7
6.6L: 10/9.5
6.0L: 6.0/5.7
6.6L: 10/9.5
Cooling system (qt/L): 6.0L: 16.4/15.5
6.6L: 25.4/24
6.0L: 16.4/15.5
6.6L: 25.4/24
6.0L: 16.4/15.5
6.6L: 25.4/24

Trailering

Trailer towing maximum with ball hitch (lb/kg) Trailer towing maximum with fifth-wheel hitch (lb/kg)
Reg. cab, long box with single rear wheels: 2WD w/ 6.0L (4.10 axle): 13000/5897
4WD w/ 6.0L (4.10 axle): 13000/5897
4WD w/ 6.6L (3.73 axle): 13000/5897
2WD w/ 6.0L (4.10 axle): 14500/6577
4WD w/ 6.0L (4.10 axle): 14200/6441
4WD w/ 6.6L (3.73 axle): 17400/7892
Reg. cab, long box with dual rear wheels: 2WD w/ 6.0L (4.10 axle): 14100/6395
4WD w/ 6.0L (4.10 axle): 13800/6259
4WD w/ 6.6L (3.73 axle): 16000/7257
2WD w/ 6.0L (4.10 axle): 14100/6395
4WD w/ 6.0L (4.10 axle): 13800/6259
4WD w/ 6.6L (3.73 axle): 20000/9072
Ext. cab, long box with single rear wheels: 2WD w/ 6.0L (4.10 axle): 13000/5897
2WD w/ 6.6L (3.73 axle): 13000/5897
4WD w/ 6.0L (4.10 axle): 13000/5897
4WD w/ 6.6L (3.73 axle): 13000/5897
2WD w/ 6.0L (4.10 axle): 14000/6350
2WD w/ 6.6L (3.73 axle): 17300/7847
4WD w/ 6.0L (4.10 axle): 13700/6214
4WD w/ 6.6L (3.73 axle): 16900/7665
Ext. cab, long box with dual rear wheels: 2WD w/ 6.0L (4.10 axle): 13600/6169
2WD w/ 6.6L (3.73 axle): 16000/7257
4WD w/ 6.0L (3.73 axle): 13400/6078
4WD w/ 6.6L (3.73 axle): 16000/7257
2WD w/ 6.0L (4.10 axle): 13600/6169
2WD w/ 6.6L (3.73 axle): 19800/8981
4WD w/ 6.0L (3.73 axle): 13400/6078
4WD w/ 6.6L (3.73 axle): 19600/8909
Crew cab, long box with single rear wheels: 2WD w/ 6.0L (4.10 axle): 13000/5897
2WD w/ 6.6L (3.73 axle): 13000/5897
4WD w/ 6.0L (4.10 axle): 13000/5897
4WD w/ 6.6L (3.73 axle): 13000/5897
2WD w/ 6.0L (4.10 axle): 13900/6318
2WD w/ 6.6L (3.73 axle): 17300/7863
4WD w/ 6.0L (4.10 axle): 13600/6181
4WD w/ 6.6L (3.73 axle): 16800/7636
Crew cab, long box with dual rear wheels: 2WD w/ 6.0L (4.10 axle): 13500/6123
2WD w/ 6.6L (3.73 axle): 16000/7257
4WD w/ 6.0L (4.10 axle): 13200/5987
4WD w/ 6.6L (3.73 axle): 16000/7257
2WD w/ 6.0L (4.10 axle): 13500/6136
2WD w/ 6.6L (3.73 axle): 19800/9000
4WD w/ 6.0L (4.10 axle): 13200/6000
4WD w/ 6.6L (3.73 axle): 19400/8818
  • John

    How do I registert to win the 2011 GMC Denali club cab?