The 2011 GMC Sierra Heavy Duty lineup features a complete reengineering aimed at providing superior trailering and payload capabilities, highlighted by its segment-leading Duramax diesel engine and Allison transmission. Enhanced control features and improved chassis construction allow for greater stability and load management, while the introduction of the exclusive Denali HD model adds premium styling and advanced interior features. These trucks are expected to arrive in showrooms in late spring 2011, showcasing GMC's commitment to quality and performance in the heavy-duty segment.

1. 2011 GMC SIERRA HEAVY DUTIES
PROFESSIONAL GRADE
REFERENCE GUIDE
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Preproduction model shown. Actual production model may vary.

2. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
PROFESSIONAL GRADE. NO COMPROMISE.
HERE COME THE NEW 2011 SIERRA HEAVY DUTIES.
GMC engineers never stop exceeding expectations. This philosophy holds true with the new Sierra Heavy
Duty (HD) lineup – a big-time example of engineering excellence with no compromise.
ALL-NEW CHASSIS AND FRAME THAT DELIVER ouTSTANDINg CAPABILITY AND RIDE
Sierra HD has been reengineered from the ground up to provide excellent trailering and payload – one
of the top reasons customers seek out heavy-duty trucks. In fact, Sierra HD provides segment-leading
payload in the most popular HD model: the 4x4 3/4-ton Crew Cab (see page 4.)
SEgMENT-LEADINg PoWER WITH A NEW DuRAMAX ® DIESEL ENgINE AND ALLISoN ® TRANSMISSIoN
This powertrain combination has a proven track record with nearly 1.3 million sold in the last decade.
Here’s to millions more - GMC has made it quieter and more powerful than before. Additionally it is now
B20 biodiesel compatible. Under the hood, 397 hp and 765 lb.-ft. of torque make the new Duramax the
most powerful diesel in the segment.
NEW CoNTRoL FEATuRES FoR CoNFIDENCE WITH HEAVY LoADS
The ultimate workhorse truck provides the utmost confidence to manage the heaviest of loads. The new
Sierra HD lineup has it all covered with an array of control features.
BEST WARRANTY IN THE SEgMENT
No one can match the GMC powertrain limited warranty – plus you get courtesy transportation and
roadside assistance.
AN EXCLuSIVE DENALI HD MoDEL
GMC is extending its exclusive Denali line to the Sierra Heavy Duty lineup – a first-time HD offering of
Denali’s unique combination of distinctive style, premium features and capability.
This guide will help you explore all that is new for the 2011 model year and what makes these trucks a
cut above the rest. Watch for the new 2011 Sierra HD lineup to be in showrooms in late Spring. For more
information, be sure to visit GMC.com/SierraHD.
DID YOU KNOW? GMC has
built trucks for 108 years ...
since 1902.
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Product information is preliminary. Production models may vary.
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2

3. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
REBUILT FROM THE GROUND UP.
GMC engineers focused on continual improvement and engineering excellence when building the 2011 Sierra Heavy Duty.
New, More Robust
Independent Front
Suspension
New, High-Strength, New, Asymmetrical Rear
Larger Brakes Fully Boxed Steel Frame Larger Brakes Leaf Spring Suspension
F E AT U R E IMPROVEMENTS BENEFIT
New, High-Strength, Fully Boxed Beaming stiffness increased 20% A more rigid and durable platform that allows
Steel Frame Frame strength increased 92% better suspension tuning and better ride
Torsional stiffness increased by five times quality by reducing frame bending
and twisting.
New, More Robust Independent Larger, stronger parts Improved ride and handling with greater
Front Suspension isolation and better tire-to-ground contact.
Larger engine and transmission mounts to
Up to a 25% increased front axle rating
control vibrations
on vehicles equipped with available Snow
Stronger and lighter upper control arms Plow Prep package.
Cast iron lower control arms to handle Facilitates a snowplow package on all 4WD
more load cab and engine combinations.
New, Asymmetrical Rear Leaf Increased in size by 20% Improved to handle increased loads and
Spring Suspension provide excellent launch feel and ride
Larger fasteners to handle increased loads
characteristics.
Urethane jounce bumpers to improve
energy management
New hydraulic body mounts to dampen
road inputs (Extended and Crew Cabs)
Larger Brakes Rotor diameter is now 14" (9% larger) Improved brake pedal feel and shorter
pedal travel.
DID YOU KNOW? Despite most chassis
components growing in weight and
strength, GMC engineers found a way
to improve diesel fuel efficiency for the
2011 model year.*
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* Based on GM testing
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4. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
T H E R E S U LT S
A maximum 16,000 lbs. conventional trailering capability1
A maximum 20,000 lbs. fifth-wheel-trailering capability1
A maximum 6,335 lbs. payload capacity2
Maximum Front Gross Axle Weight Rating of 6,000 lbs. on select 4WD models w/available Snowplow Package (a 25% increase)3
C O M PA R E T H E H I G H E S T S E L L I N G M O D E L S I N T H E H D M A R K E T
(3/4-TON CREW 4x4)
2011 GMC 2011 FORD
SIERRA 2500HD F-250
MAXIMUM CONVENTIONAL TRAILERING (GAS)1 13,000 LBS. 12,500 LBS.
MAXIMUM FIFTH-WHEEL TRAILERING (GAS)1 13,900 LBS. 15,000 LBS.
MAXIMUM CONVENTIONAL TRAILERING (DIESEL) 1
13,000 LBS. 14,000 LBS.
MAXIMUM FIFTH-WHEEL TRAILERING (DIESEL) 1
16,700 LBS. 15,700 LBS.
MAXIMUM PAYLOAD (GAS) 2
3,375 LBS. 2,790 LBS.
MAXIMUM GVWR3 10,000 LBS. 10,000 LBS.
MAXIMUM GCWR 3
24,500 LBS. 23,500 LBS.
ON THE OUTSIDE: The 2011 Sierra HD
brings a new lineup of available 17-,
18- and 20-inch* wheels. In addition,
features like the available EZ Lift
tailgate and 170-degree-opening rear
access doors (Extended Cab models)
can help get the job done.
EXTERIOR COLORS:
Midnight Blue Metallic
Onyx Black
Stealth Gray Metallic
Summit White
Fire Red
Storm Gray Metallic
Pure Silver Metallic
Gray Green Metallic NEW!
*
Use only GM approved wheel and tire combinations.
1
Maximum trailer ratings are calculated assuming standard equipped vehicle, driver, and required trailering equipment. The weight of option equipment,
passengers, and cargo will reduce the maximum trailer weight your vehicle can tow. 10% to 15% of the trailer weight is the recommended trailer tongue load.
2
Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo.
3
When properly equipped; includes weight of vehicle, passengers, cargo, and equipment.
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4

5. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
A NEW DURAMAX DIESEL® AND ALLISON® TRANSMISSION:
THE MOST-POWERFUL DIESEL IN ITS CLASS.
It’s the available Sierra HD combination that’s known for getting the toughest jobs accomplished.
Now it’s improved and stronger than ever, ready to make the toughest jobs on the toughest
days even easier. With nearly 1.3M Duramax 6.6L engines sold since 2000, they are proven
and dependable.
LARGER FUEL TANK WITH UP TO 680-MILE HIGHWAY RANGE1
SEGMENT-BEST HORSEPOWER (397@3,000 rpm)
SEGMENT-BEST TORQUE (765@1,600 rpm)
0-TO-60 TIME IMPROVED BY 13%
DEVELOPED FOR AT LEAST 200,000-MILE DURABILITY
B20 BIODIESEL COMPATIBLE
IMPROVED HIGHWAY FUEL EFFICIENCY1
65% LOWER EMISSIONS
MEETS 2010 FEDERAL EMISSIONS STANDARDS
NEW ALLISoN TRANSMISSIoN: BuILT-uP AND BATTLE-READY
It’s already a legend. And it’s been beefed up to handle more
torque and provide better efficiency. Not to mention it’s the
same brand of transmission used in M1 tanks. How’s that
for battling the toughest jobs? For the 2011 model year, the IMPROVED RANGE AND REDUCED FILL-
Allison 1000 six-speed automatic transmission includes: UPS: Sierra HD (long box or standard
■ Driver Shift Control (DSC) with Tap-Up/Tap-Down shifting box) has a larger 36 gallon fuel tank
■ Tow/Haul Mode with capacity increased by 38 percent.
Combined with an 11% improvement
■ Automatic grade braking to slow your Sierra HD on in fuel efficiency1 – you could go up to
downhill grades while helping to reduce brake wear 680 highway miles between fill-ups in a
■ Power takeoff Duramax-equipped Sierra HD.
■ A larger-diameter output shaft
■ More robust clutches
■ Two overdrive gears for efficiency
2011 GMC 2011 FORD 2010 DODGE
SIERRA HD SUPER DUTY RAM HD
DIESEL DIESEL DIESEL
TOW/HAUL MODE STANDARD STANDARD AVAILABLE
TAP-UP/TAP-DOWN
CAPABILITY ON AUTOMATIC STANDARD STANDARD AVAILABLE
TRANSMISSION
B20 BIODIESEL CAPABILITY STANDARD STANDARD AVAILABLE
AUTOMATIC LOCKING REAR
AVAILABLE NOT AVAILABLE NOT AVAILABLE
DIFFERENTIAL
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1
Based on GM testing
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5

6. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
TOOLS TO MANAGE THE HEAVIEST LOADS.
TOOLS FOR YOUR MOBILE OFFICE.
Sierra HD’s offer an array of tools to help you stay in control and put in a confident day’s work.
Inside, they reflect the professional grade blend of refinement and functionality for which GMC
is known.
F E AT U R E W H AT I T D O E S
StabiliTrak® Electronic Stability Control (all Uses a combination of braking and engine management to help improve vehicle
2500HD and single-rear-wheel 3500HD models) stability, particularly during emergency maneuvers.
Hill Start Assist Uses vehicle and trailer brakes to keep Sierra HD and/or a trailer from rolling
(on all single-rear-wheel configurations) backward when launching on an incline. The brakes apply for approximately 1.5
seconds to allow the driver to move foot from brake pedal to accelerator pedal
without any vehicle movement.
Trailer Sway Control Works with StabiliTrak to determine if the trailer is swaying and applies the
(on all single-rear-wheel configurations) brakes/trailer brakes. It also can reduce engine power to bring both the vehicle
and trailer under control.
Four-wheel ABS with larger, four-wheel disc Intelligent Brake Assist senses an urgent braking situation via the driver’s
foundation brakes and Intelligent Brake Assist application of the brake pedal then applies full braking capability without full
travel of the brake pedal.
OnStar® with six months of Offers the convenience of hands-free calling and includes Automatic Crash
Directions & Connections Plan Response, Stolen Vehicle Assistance, Emergency Services, Roadside Assistance,
standard on most models.1 Remote Horn and Lights and more.
XM® Radio2 Commercial-free music channels from virtually every genre, live performances,
(with 3-month trial) sports, entertainment, compelling talk, world news, local traffic and more – all in
crisp, clear digital sound.
USB connectivity3 Personalize your driving experience – the USB port recharges your iPod®/MP3
player while it plays audio from the device through the sound system.
Bluetooth® for phone4 Provides in-vehicle, hands-free operation with a Bluetooth-equipped cell phone.
Steering-wheel-mounted controls let you start a call and control volume, then dial
by voice and listen to your call through the audio system.
“Smart” Exhaust Brake Helps reduce brake fade while prolonging brake life. Provides confidence when
(standard on Duramax®-equipped models) hauling heavy loads on downhill grades. This system is “smart” and varies the
amount of braking needed based on the truck load and grade.
Available WiFi (via dealer-installed Autonet Mobile)5 Connect to the Internet inside your Sierra HD.
Available integrated trailer brake controller Dash-mounted controls provide a measured brake force signal to
electric-controlled trailer brakes.
Available seat pelvic/thorax and head curtain Protection in the event of a collision.
side air bags6 (2500HD models)
Available Rearview A rear camera image is displayed in the rearview mirror or on the navigation
Camera System system screen to assist visibility when backing up or when connecting to a trailer.
2011 GMC 2011 FORD 2010 DODGE
SIERRA HD SUPER DUTY RAM HD
DIESEL DIESEL DIESEL DID YOU KNOW: GMC now offers
POWERTRAIN 100,000 MILES/ 100,000 MILES/ 100,000 MILES/ a Sierra 3500 Crew Cab with a
LIMITED WARRANTY 5 YEARS7 5 YEARS 5 YEARS standard box (6.5’) and a 2WD
ROADSIDE 100,000 MILES/ 60,000 MILES/
Sierra 3500 Long Box Regular Cab
NOT AVAILABLE available in a dually configuration.
ASSISTANCE 5 YEARS 5 YEARS
COURTESY 100,000 MILES/
NOT AVAILABLE NOT AVAILABLE
TRANSPORTATION 5 YEARS
1
Optional in Work Trucks. Visit onstar.com for coverage map or call 1-888-466-7827 for system limitations and details. Services vary by model and conditions.
2
XM Radio requires a subscription, sold separately after the first 90 days. Not available in Alaska or Hawaii. For more information, visit gm.xmradio.com.
3
Not compatible with all devices.
4
Go to gm.com/bluetooth to see which phones are compatible with each vehicle.
5
Monthly rate applies. Visit autonetmobile.com for details and coverage map.
6
Always use safety belts and the correct child restraints for your child’s age and size. Even in vehicles equipped with air bags and the Passenger Sensing System, children are safer when properly secured in a rear seat. Never place a rear-facing infant restraint
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in the front seat of any vehicle equipped with an active frontal air bag. See the vehicle’s Owner’s Manual and child safety seat instructions for more safety information.
7
Whichever comes first. See dealer for details.
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7. 2011 GMC SIERRA HEAVY DUTY REFERENCE GUIDE
SIERRA HEAVY DUTY JOINS THE EXCLUSIVE DENALI FAMILY.
GMC is extending its exclusive Denali line to include Sierra Heavy Duty. Premium features and styling meet the ultimate
in capability. Sierra Denali HD is offered exclusively in a Crew Cab standard box configuration on the 2500HD chassis
with a spacious cabin (room for up to five people). Sierra Denali HD includes the exclusive features listed below:
SIERRA DENALI HD ExTERIOR
Chrome Door Handles
Denali Trademark
Honeycomb Grille
Body-Color
Bumpers
Available 20-inch*
Chrome-Accent Forged, Polished
Denali Chrome Badge Bodyside Moldings Aluminum Wheels
SIERRA DENALI HD INTERIOR
EXTERIOR COLORS:
Inside, the sophistication is evident with the distinctive Denali interior setting, functional
Black
features and technology. In addition to available features like heated and cooled front seats,
the following features come standard: Stealth Gray
■ 12-way power driver and front passenger seats White
■ Power adjustable pedals
■ Bose® Premium Surround Audio System
■ OnStar® with six months of Directions & Connections1
■ XM® Radio with three month trial2
■ Bluetooth® for phone3
T H E S A M E O U T S TA N D I N G H D C A PA B I L I T Y
Sierra Denali HD brings the great capability you would expect of a Heavy Duty Sierra.
GMC SIERRA DENALI HD GMC SIERRA DENALI HD
(DURAMAx DIESEL) (VORTEC V8)
Gross Vehicle Weight Rating up to 10,000 lbs.4 Gross Vehicle Weight Rating up to 9,500 lbs.4
Maximum Payload of up to 2,631 lbs.5 Maximum Payload of up to 2,959 lbs.5
Conventional Trailering up to 13,000 lbs. 6
Conventional Trailering up to 13,000 lbs.6
Fifth-Wheel Trailering up to 15,600 lbs.6 Fifth-Wheel Trailering up to 13,700 lbs.6
Gross Combined Weight Rating up to 24,500 lbs. 4
Gross Combined Weight Rating up to 20,500 lbs.4
*
Use only GM approved wheel and tire combinations.
1
Visit onstar.com for system limitations and details.
2
XM Radio requires a subscription, sold separately after the first 90 days. Not available in Alaska or Hawaii. For more information, visit gm.xmradio.com.
3
Go to gm.com/bluetooth to see which phones are compatible with each vehicle.
4
When properly equipped; includes weight of vehicle, passengers, cargo, and equipment.
5
Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo.
6
Maximum trailer ratings are calculated assuming standard equipped vehicle, driver, and required trailering equipment. The weight of option equipment, passengers, and cargo will reduce the maximum trailer weight your vehicle can tow. 10% to 15% of the
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trailer weight is the recommended trailer tongue load.
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8. 2011 GMC SIERRA HEAVY DUTY 2500HD AND DENALI SPECIFICATIONS
2011 GMC SIERRA HEAVY DUTY | SPECIFICATIONS
2011 SIERRA 2500HD
OVERVIEW
Models: 2500HD reg. cab, long box, 2WD & 4WD
2500HD ext. cab, std. box, 2WD & 4WD
2500HD ext. cab, long box, 2WD & 4WD
2500HD crew cab, std. box, 2WD & 4WD
2500HD crew cab, long box, 2WD & 4WD
2500HD Denali crew cab std. box, 4WD
Body style/driveline: 2-3 passenger regular cab or 5-6 passenger extended cab,
5-6-passenger crew cab
3/4-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.
ENGINES
VORTEC™ 6.0L DURAMAx® 6.6L TURBO
V8 (L96) DIESEL V8 (LML)
Type: 6.0L V8 6.6L V8
Displacement (cu.in./cc): 364/5,967 403/6,599
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, overhead valve, four valves per cylinder
variable valve timing
Ignition system: coil-near-plug, platinum-tipped spark compression, glow plug start aid
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 @ rpm): 360@5,400 397/296@3,000
Torque (lb.-ft./Nm @ rpm): 380/515@4,200 765/1037@1,600
Recommended fuel: regular unleaded diesel or B20
Maximum engine speed (rpm): 6000 3000
Emissions controls: three-way catalytic converter, positive cooled exhaust gas recirculation (EGR),
crankcase ventilation, evaporative EGR cooling-bypass system, diesel
collection system particulate filter system (DPF), selective
catalyst reduction (SCR)
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8

9. 2011 GMC SIERRA HEAVY DUTY 2500HD AND DENALI SPECIFICATIONS
TRANSMISSIONS
H Y D R A - M AT I C ® 6 L 9 0 ALLISON 1000
Type : six-speed automatic (with Vortec™ 6.0L) six-speed automatic (with Duramax® 6.6L)
G E A R R AT I O S ( : 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: 4+1 multi-leaf springs
Steering type: integral power-assisted recirculating ball
Steering ratio: 16.1
Steering wheel turns, lock-to-lock: 3.57
TURNING CIRCLE
REGULAR CAB ExTENDED CAB CREW CAB
Turning circle, curb-to-curb std. box: 44.9/13.7 std. box: 47.9/14.6 std. box: 50.5/15.4
(ft./m): long box: N/A long box: 51.8/15.8 long box: 54.8/16.7
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: 277.7/1,791
rear: 277.5/1,790
WHEELS / TIRES
Wheel size and type: 17 x 7.5-in. steel
17 x 7.5-in. aluminum
18 x 8.0-in. aluminum
20 x 8.5-in. aluminum
Tire size: LT245/75R17 all-season
LT265/70R17 all-terrain
LT265/70R18 all-season
LT265/60R20 all-terrain
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9

10. 2011 GMC SIERRA HEAVY DUTY 2500HD AND DENALI SPECIFICATIONS
ExTERIOR DIMENSIONS
ExTENDED
ExTENDED CREW CAB
REGULAR CAB CAB CREW CAB
CAB S TA N D A R D
LONG BOx S TA N D A R D LONG BOx
LONG BOx BOx
BOx
Wheelbase
133.6/3,395.4 144.1/3,662.4 158.1/4,017.4 153.7/3,904.4 167.7/4,259.4
(in./mm):
Overall length
225/5,716 230.6/5,858 249.5/6,338 240.1/6,100 259/6,580
(in./mm):
Overall width
80/2,032 80/2,032 80/2,032 80/2,032 80/2,032
(in./mm):
Overall height:
77.5/1,970.5 77.8/1,977.6 77.6/1,971 78.3/1,989.5 78/1,983
(in./mm):
Track – front
68.8/1,748 68.8/1,748 68.8/1,748 68.8/1,748 68.8/1,748
(in./mm):
Track – rear
67.3/1,709 67.3/1,709 67.3/1,709 67.3/1,709 67.3/1,709
(in./mm):
Min. ground
front: 9.8/249 front: 9.8/249 front: 9.7/248 front: 9.7/248 front: 9.7/248
clearance – 2WD
rear: 9.1/232 rear: 8.5/217 rear: 8.4/215 rear: 8.3/213 rear: 8.2/210
(in./mm):
Min. ground
front: 9.7/248 front: 9.7/248 front: 9.7/247 front: 9.7/247 front: 9.7/247
clearance – 4WD
rear: 9.1/231 rear: 8.5/216 rear: 8.4/214 rear: 8.2/209 rear: 8.2/208
(in./mm):
Step-in height
26.3/668 26.2/665 26/662 26/661 25.9/658
(in./mm):
W E I G H T R AT I N G S
GVWR CURB WEIGHT PAY L O A D
(LBS./KG) (LBS./KG) (LBS./KG)
Reg. cab, long box (2WD): 6.0L: 9,300/4,218 6.0L: 5,596/2,538 6.0L: 3,704/1,680
6.6L: 9,900/4,490 6.6L: 6,475/2,937 6.6L: 3,425/1,553
Reg. cab, long box (4WD): 6.0L: 9,500/4,309 6.0L: 5,920/2,685 6.0L: 3,580/1,624
6.6L: 9,900/4,490 6.6L: 6,775/3,073 6.6L: 3,126/1,418
Ext. cab, std. box (2WD): 6.0L: 9,500/4,309 6.0L: 5,995/2,719 6.0L: 3,506/1,590
6.6L: 10,000/4,536 6.6L: 6,795/3,082 6.6L: 3,205/1,453
Ext. cab, std. box (4WD): 6.0L: 9,500/4,309 6.0L: 6,278/2,847 6.0L: 3,222/1,461
6.6L: 10,000/4,536 6.6L: 7,105/3,222 6.6L: 2,895/1,313
Ext. cab, long box (2WD): 6.0L: 9,500/4,309 6.0L: 6,096/2,765 6.0L: 3,404/1,544
6.6L: 10,000/4,536 6.6L: 6,927/3,142 6.6L: 3,073/1,394
Ext cab, long box (4WD): 6.0L: 9,500/4,309 6.0L: 6,371/2,890 6.0L: 3,130/1,419
6.6L: 10,000/4,536 6.6L: 7,235/3,281 6.6L: 2,765/1,254
Crew cab, std. box (2WD): 6.0L: 9,500/4,309 6.0L: 6,115/2,773 6.0L: 3,385/1,535
6.6L: 10,000/4,536 6.6L: 6,907/3,133 6.6L: 3,094/1,403
Crew cab, std. box (4WD): 6.0L: 9,500/4,173 6.0L: 6,377/2,892 6.0L: 3,123/1,416
6.6L: 10,000/4,173 6.6L: 7,208/3,269 6.6L: 2,792/1,266
Crew cab, long box (2WD): 6.0L: 9,500/4,173 6.0L: 6,208/2,816 6.0L: 3,292/1,493
6.6L: 10,000/4,536 6.6L: 7,058/3,201 6.6L: 2,942/1,334
Crew cab, long box (4WD): 6.0L: 9,900/4,490 6.0L: 6,525/2,959 6.0L: 3,375/1,531
6.6L: 10,000/4,173 6.6L: 7,387/3,350 6.6L: 2,613/1,185
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10

11. 2011 GMC SIERRA HEAVY DUTY 2500HD AND DENALI SPECIFICATIONS
CARGO BOx
S TA N D A R D B O x LONG BOx
Cargo volume (cu. ft./L):
1
60.7/1,718 75.5/2,138
Length at floor (in./mm): 78.8/2,003 97.7/2,483
Width at floor (in./mm): 62.4/1,586 62.4/1,586
Tailgate width (in./mm): 61.5/1,564 61.5/1,564
Width between wheel housings (in./mm): 50.6/1,286 50.6/1,286
Inside height (in./mm): 21/533 21/533
INTERIOR
REGULAR CAB ExTENDED CAB CREW CAB
Headroom (in./mm): front: 41.1/1,044 front: 41.2/1,048
41.2/1,048
rear: 39.4/1,002 rear: 40.5/1,030
Legroom (in./mm): front: 41.3/1,049 front: 41.3/1,049
41.3/1,049
rear: 34.3/872 rear: 39/991
Shoulder room (in./mm): front: 65.2/1,657 front: 65.2/1,657
65.2/1,657
rear: 65.3/1,658 rear: 65.1/1,655
Hip room (in./mm): front: 60.3/1,532 front: 60.3/1,532
60.3/1,532
rear: 61.8/1,571 rear: 65.4/1,663
C A PA C I T I E S
REGULAR CAB ExTENDED CAB CREW CAB
Seating: 2/3 5/6 5/6
Fuel tank – 2WD and 4WD
36/136 36/136 36/136
(gal./L):
Engine oil (qt./L): 6.0L: 6.0/5.7 6.0L: 6.0/5.7 6.0L: 6.0/5.7
6.6L: 10/9.5 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 6.0L: 16.4/15.5
6.6L: 25.4/24 6.6L: 25.4/24 6.6L: 25.4/24
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1
Cargo capacity limited by weight distribution.
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11

12. 2011 GMC SIERRA HEAVY DUTY 2500HD AND DENALI SPECIFICATIONS
TRAILERING
TRAILER TOWING MAxIMUM TRAILER TOWING MAxIMUM
WITH BALL HITCH WITH FIFTH-WHEEL HITCH
(LBS./KG)1 (LBS./KG)1
Reg. cab, long box: 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,700/6,668
2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,800/8,074
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 14,400/6,531
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 17,500/7,938
Ext. cab, std. box: 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,300/6,486
2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,500/7,938
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 14,000/6,350
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 17,200/7,801
Ext. cab, long box: 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,200/6,441
2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,400/7,892
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,900/6,304
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 16,500/7,484
Crew cab, std. box: 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,200/6,441
2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,400/7,892
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,900/6,304
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 16,700/7,575
Sierra Denali HD: 4WD w/ 6.0L (3.73 axle): 9,300/4,218 4WD w/ 6.0L (3.73 axle): 9,300/4,218
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,700/6,214
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 15,600/7,076
Crew cab, long box: 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,100/6,395
2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,200/7,801
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,800/6,259
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 15,600/7,076
SAE certified.
Note: Information shown is current at time of publication.
1
Maximum trailer ratings are calculated assuming standard equipped vehicle, driver, and required trailering equipment. The weight of option equipment, passengers, and cargo will reduce the maximum trailer weight your
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
vehicle can tow. 10% to 15% of the trailer weight is the recommended trailer tongue load.
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12

13. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
2011 GMC SIERRA HEAVY DUTY | 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.
ENGINES
VORTEC™ 6.0L DURAMAx® 6.6L TURBO
V8 (L96) DIESEL V8 (LML)
Type: 6.0L V8 6.6L V8
Displacement (cu.in./cc): 364/5,967 403/6,599
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, overhead valve, four valves per cylinder
variable valve timing
Ignition system: coil-near-plug, platinum-tipped spark compression, glow plug start aid
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 @ rpm): 360/268@5,400 397/296@3,000
Torque (lb.-ft./Nm @ rpm) : 380/515@4,200 765/1037@1,600
Recommended fuel: regular unleaded diesel or B20
Maximum engine speed (rpm): 6000 3000
Emissions controls: three-way catalytic converter, positive cooled exhaust gas recirculation (EGR),
crankcase ventilation, evaporative EGR cooling-bypass system, diesel
collection system particulate filter system (DPF), selective
catalyst reduction (SCR)
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13

14. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
TRANSMISSIONS
H Y D R A - M AT I C ® 6 L 9 0 ALLISON 1000
Type : six-speed automatic (with Vortec™ 6.0L) six-speed automatic (with Duramax® 6.6L)
G E A R R AT I O S ( : 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: 4+1+2(SRW) or 3+1+2(Dually) multi-leaf springs
Steering type: integral power-assisted recirculating ball
Steering ratio: 16.1
Steering wheel turns, lock-to-lock: 3.57
TURNING CIRCLE
REGULAR CAB ExTENDED CAB CREW CAB CREW CAB
LONG BOx LONG BOx LONG BOx STD. BOx
Turning circle, SRW: 44.9/13.7 SRW: 51.8/15.8 SRW: 54.8/16.7 SRW: 50.5/15.4
curb-to-curb (ft./m): DRW: 45.6/13.9 DRW: 52.8/16.1 DRW: 55.4/16.9 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
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14

15. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
ExTERIOR DIMENSIONS
REGULAR CAB ExTENDED CAB CREW CAB CREW CAB
LONG BOx LONG BOx STD. BOx LONG BOx
Wheelbase
133.6/3,395.4 158.1/4,017.4 153.7/3,904.4 167.7/4,259.4
(in./mm):
Overall length
225/5,716 249.5/6,338 240.1/6,100 259/6,580
(in./mm):
Overall width
95.9/2,436 95.9/2,436 80/2,032 95.9/2,436
(in./mm):
Overall height 2WD: 77.3/1,965 2WD: 77.4/1,966 2WD: 77.4/1,966 2WD: 77.8/1,977
(in./mm): 4WD: 77.2/1,962 4WD: 77.3/1,963 4WD: 77.4/1,966 4WD: 77.8/1,977
Track – front w/single rear
68.8/1,748 68.8/1,748 68.8/1,748 68.8/1,748
wheels (in./mm):
Track – rear w/single rear
67.3/1,709 67.3/1,709 67.3/1,709 67.3/1,709
wheels (in./mm):
Track – rear w/dual rear
75/1,906 75/1,906 75/1,906 75/1,906
wheels (in./mm):
Minimum ground clearance front: 9.9/252.2 front: 9.6/246 front: 10/255.4 front: 9.6/245
– 2WD (in./mm): rear: 8.8/224 rear: 8.6/219.5 rear: 8.4/213.3 rear: 8.5/215
Minimum ground clearance front: 9.9/252 front: 9.6/244.5 front: 9.9/253.5 front: 9.6/244
– 4WD (in./mm): rear: 8.6/218 rear: 8.4/214.5 rear: 8.4/214.4 rear: 8.5/215
Step-in height
26/660 25.8/655 25.2/642 25.4/647
(in./mm):
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15

16. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
W E I G H T R AT I N G S
GVWR CURB WEIGHT PAY L O A D
(LBS./KG)1 (LBS./KG) (LBS./KG)2
Reg. cab, long box (2WD) 6.0L: 10,400/4,717 6.0L: 5,808/2,634 6.0L: 4,592/2,083
with single rear wheels: 6.6L: N/A 6.6L: N/A 6.6L: N/A
Reg. cab, long box (2WD) 6.0L: 12,500/5,670 6.0L: 6,165/2,796 6.0L: 6,335/2,873
with dual rear wheels: 6.6L: N/A 6.6L: N/A 6.6L: N/A
Reg. cab, long box (4WD) 6.0L: 10,700/4,853 6.0L: 6,134/2,782 6.0L: 4,566/2,071
with single rear wheels: 6.6L: 11,400/5,171 6.6L: 6,919/3,138 6.6L: 4,481/2,032
Reg. cab, long box (4WD) 6.0L: 12,800/5,806 6.0L: 6,492/2,944 6.0L: 6,308/2,861
with dual rear wheels: 6.6L: 13,000/5,897 6.6L: 7,277/3,301 6.6L: 5,724/2,596
Ext. cab, long box (2WD) 6.0L: 10,700/4,853 6.0L: 6,303/2,859 6.0L: 4,397/1,994
with single rear wheels: 6.6L: 11,200/5,080 6.6L: 6,991/3,171 6.6L: 4,209/1,909
Ext. cab, long box (2WD) 6.0L: 13,000/5,897 6.0L: 6,668/3,024 6.0L: 6,332/2,872
with dual rear wheels: 6.6L: 13,000/5,897 6.6L: 7,460/3,384 6.6L: 5,540/2,513
Ext. cab, long box (4WD) 6.0L: 11,000/4,989 6.0L: 6,580/2,984 6.0L: 4,420/2,005
with single rear wheels: 6.6L: 11,600/5,261 6.6L: 7,377/3,346 6.6L: 4,223/1,915
Ext. cab, long box (4WD) 6.0L: 13,000/5,897 6.0L: 6,945/3,150 6.0L: 6,055/2,746
with dual rear wheels: 6.6L: 13,000/5,897 6.6L: 7,742/3,511 6.6L: 5,258/2,385
Crew cab, long box (2WD) 6.0L: 10,700/4,853 6.0L: 6,414/2,909 6.0L: 4,286/1,944
with single rear wheels: 6.6L: 11,400/5,171 6.6L: 6,984/3,168 6.6L: 4,416/2,003
Crew cab, long box (2WD) 6.0L: 13,000/5,897 6.0L: 6,777/3,074 6.0L: 6,223/2,822
with dual rear wheels: 6.6L: 13,000/5,897 6.6L: 7,544/3,422 6.6L: 5,456/2,475
Crew cab, long box (4WD) 6.0L: 11,000/4,989 6.0L: 6,732/3,053 6.0L: 4,268/1,936
with single rear wheels: 6.6L: 11,600/5,261 6.6L: 7,516/3,409 6.6L: 4,085/1,853
Crew cab, long box (4WD) 6.0L: 13,000/5,897 6.0L: 7,095/3,218 6.0L: 5,905/2,678
with dual rear wheels: 6.6L: 13,000/5,897 6.6L: 7,878/3,573 6.6L: 5,122/2,323
Crew cab, std. box (2WD) 6.0L: 10,500/4,762 6.0L: 6,300/2,857 6.0L: 4,200/1,905
with single rear wheels: 6.6L: 11,100/5,034 6.6L: 7,063/3,203 6.6L: 4,038/1,831
Crew cab, std. box (4WD) 6.0L: 10,800/4,899 6.0L: 6,573/2,981 6.0L: 4,227/1,917
with single rear wheels: 6.6L: 11,500/5,216 6.6L: 7,335/3,327 6.6L: 4,165/1,889
1
When properly equipped; includes weight of vehicle, passengers, cargo, and equipment.
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2
Maximum payload capacity includes weight of driver, passengers, optional equipment, and cargo.
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16

17. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
CARGO BOx
S TA N D A R D B O x LONG BOx
Cargo volume (cu. ft./L):
1
60.7/1,718 75.5/2,138
Length at floor (in./mm): 78.8/2,003 97.7/2,483
Width at floor (in./mm): 62.4/1,586 62.4/1,586
Tailgate width (in./mm): 61.5/1,564 61.5/1,564
Width between wheel housings (in./mm): 50.6/1,286 50.6/1,286
Inside height (in./mm): 21/533 21/533
INTERIOR
REGULAR CAB ExTENDED CAB CREW CAB
Headroom (in./mm): front: 41.1/1,044 front: 41.2/1,048
41.2/1,048
rear: 39.4/1,002 rear: 40.5/1,030
Legroom (in./mm): front: 41.3/1,049 front: 41.3/1,049
41.3/1,049
rear: 34.3/ 872 rear: 39/ 991
Shoulder room (in./mm): front: 65.2/1,657 front: 65.2/1,657
65.2/1,657
rear: 65.3/1,658 rear: 65.1/1,655
Hip room (in./mm): front: 60.3/1,532 front: 60.3/1,532
60.3/1,532
rear: 61.8/1,571 rear: 65.4/1,663
C A PA C I T I E S
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 6.0L: 6.0/5.7 6.0L: 6.0/5.7
6.6L: 10/9.5 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 6.0L: 16.4/15.5
6.6L: 25.4/24 6.6L: 25.4/24 6.6L: 25.4/24
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1
Cargo capacity limited by weight distribution.
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17

18. 2011 GMC SIERRA HEAVY DUTY 3500HD SPECIFICATIONS
TRAILERING
TRAILER TOWING MAxIMUM TRAILER TOWING MAxIMUM
WITH BALL HITCH WITH FIFTH-WHEEL HITCH
(LB./KG)1 (LB./KG)1
Reg. cab, long box 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,500/6,577
with single rear wheels: 4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 14,200/6,441
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 17,400/7,892
Reg. cab, long box 2WD w/ 6.0L (4.10 axle): 14,100/6,395 2WD w/ 6.0L (4.10 axle): 14,100/6,395
with dual rear wheels: 4WD w/ 6.0L (4.10 axle): 13,800/6,259 4WD w/ 6.0L (4.10 axle): 13,800/6,259
4WD w/ 6.6L (3.73 axle): 16,000/7,257 4WD w/ 6.6L (3.73 axle): 20,000/9,072
Ext. cab, long box 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,000/6,350
with single rear wheels: 2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,300/7,847
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,700/6,214
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 16,900/7,665
Ext. cab, long box 2WD w/ 6.0L (4.10 axle): 13,600/6,169 2WD w/ 6.0L (4.10 axle): 13,600/6,169
with dual rear wheels: 2WD w/ 6.6L (3.73 axle): 16,000/7,257 2WD w/ 6.6L (3.73 axle): 19,800/8,981
4WD w/ 6.0L (3.73 axle): 13,400/6,078 4WD w/ 6.0L (3.73 axle): 13,400/6,078
4WD w/ 6.6L (3.73 axle): 16,000/7,257 4WD w/ 6.6L (3.73 axle): 19,600/8,909
Crew cab, long box 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 13,900/6,318
with single rear wheels: 2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,300/7,863
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,600/6,181
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 16,800/7,636
Crew cab, long box 2WD w/ 6.0L (4.10 axle): 13,500/6,123 2WD w/ 6.0L (4.10 axle): 13,500/6,136
with dual rear wheels: 2WD w/ 6.6L (3.73 axle): 16,000/7,257 2WD w/ 6.6L (3.73 axle): 19,800/9,000
4WD w/ 6.0L (4.10 axle): 13,200/5,987 4WD w/ 6.0L (4.10 axle): 13,200/6,000
4WD w/ 6.6L (3.73 axle): 16,000/7,257 4WD w/ 6.6L (3.73 axle): 19,400/8,818
Crew cab, std. cab 2WD w/ 6.0L (4.10 axle): 13,000/5,897 2WD w/ 6.0L (4.10 axle): 14,000/6,363
with single rear wheels 2WD w/ 6.6L (3.73 axle): 13,000/5,897 2WD w/ 6.6L (3.73 axle): 17,200/7,818
4WD w/ 6.0L (4.10 axle): 13,000/5,897 4WD w/ 6.0L (4.10 axle): 13,700/6,214
4WD w/ 6.6L (3.73 axle): 13,000/5,897 4WD w/ 6.6L (3.73 axle): 17,000/7,727
SAE certified.
Note: Information shown is current at time of publication.
1
Maximum trailer ratings are calculated assuming standard equipped vehicle, driver, and required trailering equipment. The weight of option equipment, passengers, and cargo will reduce the maximum trailer weight your
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
vehicle can tow. 10% to 15% of the trailer weight is the recommended trailer tongue load.
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18