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For release March 10_ 2010_ 1201 a

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For release March 10_ 2010_ 1201 a Powered By Docstoc
					For release: March 10, 2010, 12:01 a.m. EST


READY TO WORK: NEW 2011 SIERRA HD CHASSIS CAB AND BOX-DELETE
MODELS ARE MORE CAPABLE, STRONGER AND MORE EFFICIENT

ST. LOUIS, Mo. – GMC’s 2011 Sierra 3500HD chassis cab trucks deliver greater
capability, efficiency and refinement than the models they replace – including an
increased gross vehicle weight rating of up to 13,200 pounds (5,987 kg) and a gross
combined weight rating of up to 27,500 pounds (12,473 kg) on dual rear wheel models.


They go on sale this summer, along with commercial 2500HD- and 3500HD-based box-
delete models.


All models feature a new, stronger independent front suspension with a front axle weight
rating that increases up to 25 percent, which expands the range of upfit capabilities –
including a new ambulance prep package – and enables snow plow use on all 4WD
models. Also new for chassis cabs are 2WD and 4WD crew cab configurations. The
crew cab replaces the previous extended cab, allowing more people to travel more
comfortably – a benefit for work crews traveling to the job site.


“These trucks were designed for a large variety of uses, all based on customer
feedback,” said Joyce Mattman, marketing director, GM Fleet and Commercial
Operations. “Our engineers met with members of the National Truck Equipment
Association during the development process, giving us valuable feedback and input to
the truck you’re seeing today.”


Chassis cab and box-delete models are based on the new 2011 Sierra heavy-duty
trucks, offering a long list of new and enhanced features, including:
      Front Axle Weight Rating increased to 6,000 pounds (2,721 kg)
      Rear Axle Weight Rating increased to 9,750 pounds (4,422 kg)
      Maximum payload of up to 7,293 pounds (3,308 kg) on chassis cab
      New frames on chassis cab and box-delete models support greater capabilities
       and increased weight ratings
      New, more powerful 6.6L Duramax diesel that delivers 335 horsepower (249 kW)
       and 685 lb.-ft. of torque (928 Nm), with greater fuel economy, up to 63-percent
       lower emissions, B20 biodiesel capability and quicker acceleration
      Larger fuel tanks – 36 gallon (136 L) single tank on box-delete and up to 63.5-
       gallon (240 L) combined dual-tank capacity on chassis cab models with the 6.6L
       Duramax – and fuel economy improvements enable greater driving range
       between fuel stops
      All-new “smart” exhaust brake feature provides greater control on grades and
       reduced brake pad wear
      Standard “dually” wheel size of 17 inches; 3500HD single rear wheel size
       increases to 18 inches
      New diesel exhaust fluid system designed not to interfere with body installations
      Purposeful technology, including available mobile WiFi, USB connectivity,
       Bluetooth connectivity, XM Satellite Radio, OnStar 9.0 and navigation
      Available head and side impact air bags on 2500HD box-delete.


The new crew cab chassis cab configuration is offered in a 60-inch cab-to-axle (CA),
while the regular cab chassis cab models are offered in 60-inch and 84-inch CAs.


Stronger independent front suspension
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.
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. The
independent design also helps maintain a consistent tire contact patch on the road for
optimal vehicle control.


New frames and larger rear leaf springs
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
HD trucks, giving them a greater feeling of smoothness and control. 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.


Box-delete models feature fully-boxed rear frames, while chassis cab models feature C-
channel rear frame sections designed to suit a variety of common body applications.
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.


Matching the Sierra HD’s greater strength and capability is a rear suspension designed
to support greater loads. Chassis cab models use a conventional leaf-spring suspension
design, while box-delete models use a new, asymmetrical leaf-spring design. 2500HD
models feature a two-stage leaf-spring design, while 3500HD models have a three-stage
design.


All models feature new, 3-inch-wide (76 mm) leaf springs that are 20-percent wider than
previous models. The wider design supports increased rear gross axle weight ratings
across the board – up to 9,750 pounds (4,423 kg) on chassis cab models.


More powerful and efficient 6.6L Duramax turbo diesel
Sierra HD trucks are offered with a new version of the 6.6L Duramax turbo diesel engine
that is more powerful, more efficient, compatible with B20 biodiesel and delivers up to
63-percent lower NOx emissions. It is also enhanced for greater durability.


Power ratings are 335 horsepower (249 kW) at 3,100 rpm and 685 lb.-ft. of torque (928
Nm) at 1,600 rpm.


The new Duramax – known by its LGH engine code – is based on the same improved
architecture and includes most of the same features as the LML-code Duramax used in
Sierra Denali HD, 2500HD and 3500HD pickups, but is engineered to meet federal
certification standards for incomplete vehicles. Vehicles with the LML engine are certified
to a different standard. Mostly, that means the LGH is emissions-certified separately
from the rest of the vehicle, while the LML is certified in the vehicle, with all of the
exhaust and emissions equipment.


Features shared with new Duramax engines include:
       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
       B20 biodiesel capability for an alternative fueling option
       Internal revisions that improve durability.


Both versions use a selective catalytic reduction after-treatment system, with diesel
exhaust fluid (DEF) injection to provide the best overall diesel characteristics and
performance.


The LGH Duramax features a robust EGR cooling system, along with revised
turbocharger tuning that helps enhance EGR performance (the LML has an EGR
bypass) and specific injector nozzles. The LGH also has a larger-capacity selective
catalytic reduction system than the pickup-based LML.
Importantly, the Sierra’s diesel after-treatment system is designed to provide unimpeded
installation of vehicle bodies.


New Allison 1000 six-speed automatic
A new Allison 1000 six-speed automatic transmission works with the Duramax 6.6L to
deliver greater fuel economy, quicker acceleration, greater towing capability and an
exhaust brake system. This enhanced transmission is strengthened to handle the higher
torque capability of the new 6.6L Duramax engine, while also helping improve fuel
economy – delivered through reduced “spin loss” – meaning the transmission channels
more of the engine’s power to the axle, allowing it to do more with less fuel. The
transmission also provides seamless assistance with a new exhaust brake system.


The Allison 1000 also features driver shift control with tap up/tap down shifting and a
patented elevated idle mode cab warm-up feature. A tow/haul mode reduces shift
cycling for better control and improved cooling when towing or hauling heavy loads.


Strengthened Vortec 6.0L/Hydra-Matic 6L90 powertrain is standard
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 offers greater idle refinement characteristics for 2011 and 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.


The 6L90 is enhanced for greater strength, smoothness and quietness. Interestingly,
Ford’s new Super Duty models share the same transmission between their gas and
diesel engines. Sierra’s Allison 1000 and Hydra-Matic 6L90 transmission were
developed for the specific horsepower, torque and operating ranges that distinguish the
engines with which they’re paired.


Greatly improved brake feel and performance
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 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 improved 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.


‘Smart’ exhaust brake feature enhances performance
A new standard feature on Duramax-equipped models is the “smart” exhaust brake
feature, which provides greater control and reduces brake pad wear. 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.


The feature is integrated with the cruise control 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
The 2011 Sierra chassis cab and box-delete trucks benefit from a comprehensive roster
of safety features and functional technologies that include:
      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
      Segment-exclusive OnStar 9.0
      Seat pelvic/thorax and head curtain side air bags available on 2500HD box-
       delete
      StabiliTrak electronic stability control system on box-delete single-rear-wheel
       models
      Trailer sway control system on all box-delete single-rear-wheel models
          Hill start assist standard on box-delete 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 throttle 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.


Ready for the long haul – and the cold
The 2011 Sierra HDs drive farther without stopping to refuel. Chassis cab models are
equipped with dual tanks with a combined capacity of 63.5 gallons (240 L) – a 27-
percent increase in capacity. A new, 36-gallon (136 L) fuel tank is standard on all box-
delete models.


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 up the interior faster.


And when customers are inside the cab, they’ll find it comfortable, quiet and designed to
work. It features numerous storage compartments, providing covered access for
everything from work gloves to laptops. For those who use their truck as a mobile office,
Sierra trucks 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.
The 2011 Sierra commercial trucks have the best warranty coverage in America
All 2011 Sierra chassis cab and box-delete models 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.


                                                  ###
2011 SIERRA 2500HD BOX-DELETE

Overview
 Models:                      2500HD regular, extended and crew cab, 2WD and 4WD
 Body style / driveline:      3-passenger regular cab, 5-6-passenger extended or crew cab;
                              3/4-ton; 2- and 4-wheel-drive heavy-duty truck
 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

Engines
                                Vortec 6.0L V-8 (L96)          Duramax 6.6L Turbo Diesel V-8
                                                               (LGH)
 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     overhead valve, four valves per
                                per cylinder, variable valve   cylinder
                                timing
 Ignition system:               coil-near-plug, platinum-      compression, glow plug start aid
                                tipped spark plugs, low-
                                resistance spark plug wires
 Fuel delivery:                 sequential fuel injection      direct injection diesel with high-
                                                               pressure common rail
 Compression ratio:             9.6:1                          16.0:1
 Horsepower (hp / kW @          322 / 240 @ 4400 (est.)        335 / 249 @ 3100
 rpm):
 Torque (lb-ft / Nm @ rpm):     380 / 515 @ 4200 (est.)        685 / 928 @ 1600
 Recommended fuel:              regular unleaded               diesel or B20
 Maximum engine speed              6000                              3000
 (rpm):
 Emissions controls:               three-way catalytic               cooled exhaust gas recirculation
                                   converter, positive               (EGR), diesel particulate filter
                                   crankcase ventilation,            system (DPF), selective catalyst
                                   evaporative collection            reduction (SCR)
                                   system

Transmissions
                                   Hydra-Matic 6L90                  Allison 1000
 Type:                             six-speed automatic (with         six-speed automatic (with
                                   Vortec 6.0L)                      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, curb-to-curb (ft / m):   54.8 / 16.7

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

Wheels / Tires
 Wheel size and type:              17 x 7.5-in steel
                                   17 x 7.5-in aluminum
                                   18 x 8.0-in aluminum
 Tire size:                        LT245/75R17 all-season
                                   LT265/70R17 all-terrain
                                   LT265/70R18 all-season

Dimensions

Exterior
                                   Regular Cab              Extended Cab          Crew Cab
 Wheelbase (in / mm):              133.6 / 3395.4           158.1 / 4017.4        167.7 / 4259.4
 Overall length (in / mm):         225 / 5716               249.5 / 6338          259 / 6580
 Overall width (in / mm):          80 / 2032                80 / 2032             80 / 2032
 Overall height: (in / mm):        77.5 / 1970.5            77.6 / 1971           78 / 1983
 Track – front (in / mm):          68.8 / 1748              68.8 / 1748           68.8 / 1748
 Track – rear (in / mm):           67.3 / 1709              67.3 / 1709           67.3 / 1709
 Min. ground clearance –           front: 9.8 / 249         front: 9.7 / 248      front: 9.7 / 248
 2WD (in / mm):                    rear: 9.1 / 232          rear: 8.4 / 215       rear: 8.2 / 210
 Min. ground clearance –           front: 9.7 / 248         front: 9.7 / 247      front: 9.7 / 247
 4WD (in / mm):                    rear: 9.1 / 231          rear: 8.4 / 214       rear: 8.2 / 208
 Step-in height (in / mm):         26.3 / 668            26 / 662              25.9 / 658

Weight and payload ratings
                           GVWR (lb / kg)        Curb Weight (lb / kg)   Payload (lb / kg)
 Reg cab 2WD:              6.0L: 9300 / 4218     6.0L: 5159 / 2340       6.0L: 4141 / 1878
                           6.6L: 9900 / 4490     6.6L: 6101 / 2767       6.6L: 3799 / 21723
 Reg cab 4WD:              6.0L: 9500 / 4309     6.0L: 5451 / 2472       6.0L: 4048 / 1836
                           6.6L: 9900 / 4490     6.6L: 6347 / 2879       6.6L: 3552 / 1611
 Ext cab 2WD:              6.0L: 9500 / 4309     6.0L: 5666 / 2570       6.0L: 3833 /1738
                           6.6L: 10000 / 4536    6.6L: 6562 / 2976       6.6L: 3438 / 1559
 Ext cab 4WD:              6.0L: 9500 / 4309     6.0L: 5943 / 2695       6.0L: 3557 / 1613
                           6.6L: 10000 / 4536    6.6L: 6844 / 3104       6.6L: 3156 / 1431
 Crew cab 2WD:             6.0L: 9500 / 4309     6.0L: 5688 / 2580       6.0L: 3812 / 1729
                           6.6L: 10000 / 4536    6.6L: 6680 / 3030       6.6L: 3320 / 1506
 Crew cab 4WD:             6.6L: 9900 / 4490     6.0L: 6083 / 2759       6.0L: 3817 / 1781
                           6.6L: 10000 / 4536    6.6L: 6999 / 3174       6.6L: 3000 / 1360

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:                          3/5/6
 Fuel tank – 2WD and 4WD           36 / 136
 (gal / L):
 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

*SAE certified.

Note: Information shown is current at time of publication.



SPECIFICATIONS

2011 SIERRA 3500HD BOX-DELETE

Overview
 Models:                         3500HD regular, extended and crew cab, 2WD and 4WD
 Body style / driveline:         3-passenger regular cab, 5-6-passenger crew cab, 2- and 4-wheel-
                                 drive heavy-duty truck
 Construction:                   body on frame
 EPA vehicle class:              full-size truck
 Manufacturing location:         Flint, Mich., Ft. Wayne, Ind.
 Key competitors:                Ford Super Duty Series, Ram heavy-duty

Engines
                                 Vortec 6.0L V-8 (L96)              Duramax 6.6L Turbo Diesel V-8
                                                                    (LGH)
 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     overhead valve, four valves per
                                 cylinder, variable valve timing    cylinder
 Ignition system:                coil-near-plug, platinum- tipped   compression, glow plug start aid
                                 spark plugs, low-resistance
                                 spark plug wires
 Fuel delivery:                  sequential fuel injection          direct injection diesel with high-
                                                                    pressure common rail
 Compression ratio:              9.6:1                              16.0:1
 Horsepower (hp / kW @           322 / 240 @ 4400 (est.)            335 / 249 @ 3100
 rpm):
 Torque (lb-ft / Nm @ rpm):      380 / 515 @ 4200 (est.)            685 / 928 @ 1600
 Recommended fuel:               regular unleaded                   diesel or B20
 Maximum engine speed            6000                               3000
 (rpm):
 Emissions controls:             three-way catalytic converter,     cooled exhaust gas recirculation
                                 positive crankcase ventilation,    (EGR), diesel particulate filter
                                 evaporative collection system      system (DPF), selective catalyst
                                                                    reduction (SCR)

Transmissions
                                 Hydra-Matic 6L90                   Allison 1000
 Type:                           6-speed automatic (with Vortec     6-speed automatic (with Duramax
                                 6.0L)                              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, curb-to-curb (ft / m):     SRW: 54.8 / 16.7
                                            DRW: 55.4 / 16.9

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          Extended Cab             Crew Cab
 Wheelbase (in / mm):           133.6 / 3395.4       158.1 / 4017.4           167.7 / 4259.4
 Overall length (in / mm):      225 / 5716           249.5 / 6338             259 / 6580
 Overall width (in / mm):       95.9 / 2436          95.9 / 2436              95.9 / 2436
 Overall height (in / mm):      2WD: 77.3 / 1965     2WD: 77.4 / 1966         2WD: 77.8 / 1977
                                4WD: 77.2 / 1962     4WD: 77.3 / 1963         4WD: 77.8 / 1977
 Track – front w/single rear    68.8 / 1748          68.8 / 1748              68.8 / 1748
 wheels (in / mm):
 Track – rear w/single rear     67.3 / 1709          67.3 / 1709              67.3 / 1709
 wheels (in / mm):
 Track – rear w/dual rear       75 / 1906            75 / 1906                75 / 1906
 wheels (in / mm):
 Minimum ground clearance       front: 9.9 / 252.2   front: 9.6 / 246         front: 9.6 / 245
 – 2WD (in / mm):               rear: 8.8 / 224      rear: 8.6 / 219.5        rear: 8.5 / 215
 Minimum ground clearance       front: 9.9 / 252     front: 9.6 / 244.5       front: 9.6 / 244
 – 4WD (in / mm):               rear: 8.6 / 218      rear: 8.4 / 214.5        rear: 8.5 / 215
 Step-in height (in / mm):      26 / 660             25.8 / 655               25.4 / 647

Weight and payload ratings
                        GVWR (lb / kg)        Curb Weight (lb / kg)       Payload (lb / kg)
 Reg cab 2WD -          6.0L:10400 / 4717     6.0L: 5359 / 2431           6.0L: 5041 / 2286
 SRW:                   6.6L: 11100 / 5035    6.6L: 6177 / 2802           6.6L: 4922 / 2232
 Reg cab 2WD -          6.0L: 12500 / 5670    6.0L: 5632 / 2554           6.0L: 6868 / 3115
 DRW:                   6.6L: 13000 / 5896    6.6L: 6461 / 2930           6.6L: 6539 / 2966
 Reg cab 4WD -          6.0L: 10700 / 4853    6.0L: 5685 / 2669           6.0L: 5014 / 2274
 SRW:                   6.6L: 11400 / 5171    6.6L: 6519 / 2957           6.6L: 4881 / 2214
 Reg cab 4WD -          6.0L: 12800 / 5806    6.0L: 5958 / 2702           6.0L: 6841 / 3103
 DRW:                   6.6L: 13000 / 5896    6.6L: 6801 / 3085           6.6L: 6198 / 2811
 Ext cab 2WD -          6.0L: 10700 / 4853    6.0L: 5866 / 2660           6.0L: 4834 / 2192
 SRW:                   6.6L: 11200 / 5080    6.6L: 6646 / 3014           6.6L: 4554 / 2065
 Ext cab 2WD –          6.0L: 13000 / 5896    6.0L: 6141 / 2785           6.0L: 6859 / 3111
 DRW:                   6.6L: 13000 / 5896    6.6L: 6928 / 3142           6.6L: 6072 / 2754
 Ext cab 4WD -          6.0L: 11000 / 4989    6.0L: 6143 / 2786           6.0L: 4857 / 2203
 SRW:                   6.6L: 11600 / 5261    6.6L: 6982 / 3167           6.6L: 4618 / 2094
 Ext cab 4WD –          6.0L: 13000 / 5896    6.0L: 6418 / 2911           6.0L: 6582 / 2985
 DRW:                   6.6L: 13000 / 5896    6.6L: 7262 / 3294           6.6L: 5738 / 2602
 Crew cab 2WD –         6.0L: 10700 / 4853    6.0L: 5981 / 2713           6.0L: 4719 / 2140
 SRW:                   6.6L: 11400 / 5171    6.6L: 6848 / 3106           6.6L: 4552 / 2064
 Crew cab 2WD –         6.0L: 13000 / 5896    6.0L: 6256 / 2837           6.0L: 6744 / 3059
 DRW:                   6.6L: 13000 / 5896    6.6L: 7123 / 3231           6.6L: 5876 / 2665
 Crew cab 4WD –         6.0L: 11000 / 4989    6.0L: 6299 / 2857           6.0L: 4701 / 2132
 SRW:                   6.6L: 11600 / 5261    6.6L: 7147 / 3242           6.6L: 4453 / 2020
 Crew cab 4WD –         6.0L: 13000 / 5896    6.0L: 6574 / 2982           6.0L: 6426 / 2914
 DRW:                   6.6L: 13000 / 5896    6.6L: 7422 / 3366           6.6L: 5578 / 2530

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:                        3/5/6
 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

*SAE certified.

Note: Information shown is current at time of publication.


2011 SIERRA 3500HD CHASSIS CAB

Overview
 Models:                       3500HD reg. cab, 60-in. CA
                               3500HD reg. cab, 84-in. CA
                               3500HD crew cab, 60-in. CA
 Body style / driveline:       3 passenger regular cab or 6 passenger crew cab, 2- and 4-wheel-
                               drive chassis cab
 Construction:                 body on frame
 EPA vehicle class:            full-size truck
 Manufacturing location:       Flint, Mich.
 Key competitors:              Ford Super Duty Series, Ram heavy-duty

Engines
                               Vortec 6.0L V-8 (L96)              Duramax 6.6L Turbo Diesel V-8
                                                                  (LGH)
 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     overhead valve, four valves per
                               cylinder, variable valve timing    cylinder
 Ignition system:              coil-near-plug, platinum- tipped   compression, glow plug start aid
                               spark plugs, low-resistance
                               spark plug wires
 Fuel delivery:                sequential fuel injection          direct injection diesel with high-
                                                                  pressure common rail
 Compression ratio:            9.6:1                              16.0:1
 Horsepower (hp / kW @         322 / 240 @ 4400 (est.)            335 / 249 @ 3100
 rpm):
 Torque (lb-ft / Nm @ rpm):    380 / 515 @ 4200 (est.)            685 / 928 @ 1600
 Recommended fuel:             regular unleaded                   diesel or B20
 Maximum engine speed          6000                               3000
 (rpm):
 Emissions controls:           three-way catalytic converter,     cooled exhaust gas recirculation
                               positive crankcase ventilation,    (EGR), diesel particulate filter
                               evaporative collection system      system (DPF), selective catalyst
                                                                  reduction (SCR)

Transmissions
                               Hydra-Matic 6L90                   Allison 1000
 Type:                         6-speed automatic (with Vortec     6-speed automatic (with Duramax
                               6.0L)                              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, 60-in.      Regular Cab, 84-in.     Crew Cab, 60-in.
                               CA                       CA                      CA
 Turning circle, curb-to-      TBD                      TBD                     TBD
 curb (ft / m):

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           Regular Cab           Crew Cab
                               w/ 60-in. CA          w/ 84-in. CA          w/ 60-in. CA
 Wheelbase (in / mm):          137.5 / 3492.5        162 / 4114.8          171.5 / 4356.1
 Overall length (in / mm):     229.5 / 5828.8        254.1 / 6454.8        263.6 / 6696.9
 Body width (in / mm):         80 / 2032             80 / 2032             80 / 2032
 Overall height (in / mm):     TBD                   TBD                   TBD
 Cab to axle (in / mm):        59.8 / 1518.9         84.3 / 2141           59.4 / 1508.3
 Front bumper to axle (in /    38.8 / 2959           38.8 / 2959           38.8 / 2959
 mm):
 Front bumper to back of       116.5 / 2959          116.5 / 2959          150.9 / 3833
 cab (in / mm):

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

Weight and payload ratings
                                 GVWR (lb / kg)          Curb Weight (lb /       Payload (lb / kg)
                                                         kg)
 Reg cab, 60-in CA – 2WD:        6.0L: 13200 / 5988      6.0L: 5907 / 2679       6.0L: 7293 / 3308
                                 6.6L: 13200 / 5988      6.6L: 6684 / 3032       6.6L: 6516 / 2955
 Reg cab, 60-in CA – 4WD:        6.0L: 13200 / 5988      6.0L: 6201 / 2812       6.0L: 6999 / 3174
                                 6.6L: 13200 / 5988      6.6L: 6970 / 3161       6.6L: 6229 / 2825
 Reg cab, 84-in CA – 2WD:        6.0L: 13200 / 5988      6.0L: 5995 / 2719       6.0L: 7205 / 3268
                                 6.6L: 13200 / 5988      6.6L: 6768 / 3070       6.6L: 6432 / 2918
 Reg cab, 84-in CA – 4WD:        6.0L: 13200 / 5988      6.0L: 6306 / 2860       6.0L: 6896 / 3128
                                 6.6L: 13200 / 5988      6.6L: 7083 / 3213       6.6L: 6117 / 2775
 Crew cab, 60-in CA – 2WD:       6.0L: 13200 / 5988      6.0L: 6450 / 2926       6.0L: 6750 / 3062
                                 6.6L: 13200 / 5988      6.6L: 7205 / 3268       6.6L: 5995 / 2719
 Crew cab, 60-in CA – 4WD:       6.0L: 13200 / 5988      6.0L: 6765 / 3069       6.0L: 6434 / 2919
                                 6.6L: 13200 / 5988      6.6L: 7526 / 3414       6.6L: 5674 / 2574

Capacities
                                 Regular Cab                 Crew Cab
 Seating:                        3                           6
 Fuel tank (gal / L):            23.5 / 89                   23.5 / 89
                                 40 / 151.4                  40 / 151.4
                                 63.5 / 240.4                63.5 / 240.4
 Engine oil (qt / L):            6.0L: 6.0 / 5.7             6.0L: 6.0 / 5.7
                                 6.6L: 10 / 9.5              6.6L: 10 / 9.5
 Cooling system (qt / L):        6.0L: 16.4 / 15.5           6.0L: 16.4 / 15.5
                                 6.6L: 25.4 / 24             6.6L: 25.4 / 24

*SAE certified.

Note: Information shown is current at time of publication.

				
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