2008 GMC SIERRA 2500HD & 3500HD

New for 2008

• XM Satellite Radio available on W/T models
• 17-inch wheels standard on Dually models
• Two new exterior colours: Dark Crimson Metallic and Sonoma Red Metallic

Model Lineup

	Engines		Transmissions
	Vortec 6.0L V-8 (LY6)	Duramax 6.6L V-8 diesel (LMM)	6-spd auto (Hydra-Matic 6L90)	6-spd auto (Allison 1000)
Sierra 2500HD	s	o	s	o
Sierra 3500HD	s	o	s	o

Key:

Standard	s
Optional	o
Not available	-

 

---

2008 GMC SIERRA HEAVY-DUTY TRUCKS: READY FOR ANY TASK

GMC Sierra introduced all-new heavy-duty pickups during the '07 model year. They were highlighted by all-new and differentiated exterior designs, two unique interiors and class-leading power and efficiency. They roll into 2008 ready for work or leisure, with minor refinements and enhancements, while still loaded with segment-leading and segment-exclusive features.

Sierra heavy-duties are offered in a range of 2500HD (three-quarter-ton) and 3500HD (one-ton) models; and are available in WT, SLE and SLT trim. The range of configurations - three cab styles, three cargo box styles and five wheelbase lengths - delivers tremendous choice. Some full-size truck manufacturers do not even offer three-quarter-ton or one-ton heavy-duty trucks. And among those that do, the 2008 Sierra HD pickups offer many segment-best capabilities, including 18,500-pound (8,392 kg) gross combined vehicle weight rating for vehicles with a gas V-8 and a 13,000-pound (5,897 kg) conventional trailer weight rating enabled by a larger-capacity trailer hitch platform. Maximum towing capacity is 16,700 pounds (7,575 kg), when equipped with a fifth-wheel hitch.

Changes to the Sierra 2500HD and 3500HD for '08 are minor, and include two new exterior colours: Dark Crimson Metallic and Sonoma Red Metallic.

Dually models in 2008 receive new, larger 17-inch wheels (replacing 16-inch wheels), which are available with bright wheel covers.

Bold and distinctive exterior designs

Sierra HD models have a distinctive front end with a prominent GMC emblem set in a large, chrome-ringed grille (black grille surround on W/T models). The grille is flanked by large, jewelled-appearance headlamps. SLE and SLT models feature large foglamps set into the bumper, creating an upscale appearance that further reflects GMC's brand identity.

The trucks are refined looking, too, with doors that extend over the rockers for a smooth, uninterrupted look, and lamps that have a jewelled appearance. The door handles feature large, grab-style designs that are easy to open with gloves. Tolerances between panels are minimal - including a 50-percent reduction in the space between the cab and cargo box - which enhances the overall sleekness of the design.

Cab and cargo box configurations

Sierra 2500HD and 3500HD are offered in regular, extended and crew cab configurations, which are complemented with standard 2 metres (6-foot 6-inch) and long 2.4 metres (8-foot) cargo box lengths. Sierra 3500HD models also are available with the Dually dual rear wheel configuration on a long 2.4 metres (8-foot) box. Features such as 170-degree-opening (164 degrees with dual rear wheels) rear access doors with fully retractable power windows on extended cab models, offer increased versatility.

The pickup boxes have great versatility, strength and capacity. A one-piece wheelhouse and inner box side offers strength and a smoother, more integrated appearance. The boxes are 30 mm (1.18 inches) deeper in the front and 40 mm (1.57 inches) deeper at the rear than previous-generation models, with stronger inner walls that offer improved performance when fitted with ladder racks, tool boxes and other accessories. Cargo bed volume is 1,718 litres (60.7 cubic feet) with the regular box and 2,138 litres (75.5 cubic feet) with the long box.

Dually cargo boxes are completely made of steel, including hydroformed sheet metal outer fenders. They have a smooth, integrated appearance and enhanced strength. All Dually models feature marker lights on the fenders and new, sleek cab roof lights that are aerodynamically integrated into the top of the cab.

The tailgate designs include an available lock and EZ Lift feature, with torque-rod assist. The tailgates are also easily removed by simply opening to 45 degrees and pulling straight out and away from the vehicle.

An innovative cargo management system is available and is complemented by a range of dealer-ordered accessory packages. Three rails that run the length of the box sides and the forward box wall are secured with high-strength anchors and, unlike competitors' systems, incorporate upper and lower tracks. Four adjustable tie-down brackets are included with each system and can be located anywhere on the tracks.Each side rail is rated for a load point of 227 kg (500 pounds).

At the heart of a comprehensive accessories portfolio for the pickups is a group of specific accessory products designed to integrate into the cargo management system. The rails enable the use of an overhead utility rack rated at 227 kg (500 pounds) loading capacity, a sliding diamond plate toolbox, a sliding bed divider and diamond plate side storage boxes. These accessories use either the upper or lower rails, allowing numerous combinations that can easily fit together or bypass one another as they slide along the rails. The toolboxes use a codeable lock, enabling the vehicle key to be used for locking and unlocking these accessories.

Segment-leading interior designs with superior craftsmanship

GMC Sierra 2500HD and 3500HD are quieter, more spacious and refined inside, with increased passenger comfort and storage space. Each features two distinct interior designs that reflect their respective brand identities, including specific trim, appointments and gauge cluster appearance.

W/T and SLE models include a functional pure pickup interior design theme with a contemporary adaptation of GM's ergonomic cockpit instrument panel design. In addition, this interior includes specific door panels with large door pull and release handles, as well as unique seat configurations; centre console and underseat storage systems. It also includes two glove boxes (a traditional lower glove box and a covered upper storage compartment).

Luxury-inspired premium interiors are standard on SLT models. They offer richly appointed features, including a distinct instrument panel design, large-capacity centre console (20.1 litres), specific door panels, seats and other trim elements. Features on the premium interiors include power-adjustable heated bucket seats, leather surface seats, leather-appointed steering wheel and selective chrome trim.

Spaciousness in each interior trim level is enhanced with "low and forward" instrument panels that provide a more airy feel to the cabin as well as a panoramic field of vision. The instrument panels are mounted approximately 90 mm (3.5 inches) down and forward on the pure pickup interiors, while the premium interior instrument panel is located 127 mm (5 inches) down and forward. Both instrument panel designs are integrated into their specific door panels to create a swept appearance.

All interiors are refined and craftsmanship is highlighted by flush surfaces, tight gaps and tolerances on the instrument panel, centre stack, clusters and other components. Most gaps on the instrument panels and clusters are 0.5 mm or less. Attention to detail was given to concealing fasteners and metal structural components of all seats. There is no exposed hardware in the interior or doorsills. Soft-touch and low-gloss finishes for the instrument panels and other trim pieces are used throughout. The colour and grain of the materials were carefully selected to provide a premium look.

Complementing the interiors' finely crafted look and feel is exceptional quietness. All trim levels - even base W/T models - benefit from a comprehensive system that delivers a passenger environment almost devoid of noise. This is achieved with the use of strategically placed sound-deadening and sound-absorbing material in the body structure - including liquid-applied dampener on the floor and front-of-dash - as well as the inherent, vibration-minimizing traits of the stiffer frame and quieter attributes of the aerodynamically tuned exterior. Also, improved-design door sealing and a doors-over-rockers design help eliminate road and wind noise.

Additional highlights of GMC Sierra heavy-duty interiors include:

• A stadium-style rear seat with a 60/40-split design and folding centre armrest can be easily folded up to provide an uninterrupted load floor. Or, either section of the split seat can be stowed independently, allowing room for both cargo and a rear-seat passenger
  
  
• A "double" glove box, which includes a large-capacity, traditional glove box and a new, covered storage compartment above it, with a 3.4-litre storage capacity
  
  
• Models equipped with the luxury-inspired premium interior come with a single large glove box for substantial storage capacity
  
  
• The premium interiors include large centre consoles with the segment's largest storage capacity: 20.1 litres of undivided volume
  
  
• The pure pickup interiors feature a 6.1-litre armrest storage console and an underseat storage bin built into a new 40/20/40-split bench seat. This 9.1-litre lockable storage bin, which includes an accessory power outlet, is located under the centre seat cushion and is large enough to store a laptop computer
  
  
• The gauges have an analogue display, with large, easy-to-read graphics. They are lit with ice-blue LED lighting, which provides crisp, bright illumination and a more upscale look. A driver information centre is incorporated on the instrument panel
  
  
• Air conditioning is standard on WT and SLE, with a dual-zone automatic system standard on SLT. The dual-zone system allows for up to a 1.1-degree difference in temperature settings between the driver and front passengers
  
  
• Power-operated rear side glass is featured on extended cab models. The windows lower completely into the rear access doors
  
  
• Power-operated back glass is available on extended and crew cab models. The window operates with the touch of a button located on the overhead console
  
  
• A large, power-operated sunroof is available on extended and crew cab models. The crew cab sunroof has a tilt/slide design, with a sliding sun shade and express open/close feature. The extended cab sunroof uses a spoiler-type sunroof design that slides back over the roof surface
  
  
• Ultrasonic Rear Parking Assist provides audible warnings of objects behind the vehicle
  
  
• A heated windshield washer fluid system more effectively removes bug spatter and thin layers of ice and frost. When the system is activated, washer fluid is heated to 60-degree Celsius or more
  
  
• A diverse range of radio systems, including single-CD, six-disc CD, MP3- and DVD-capable - is available. Several radios feature RDS technology, which provides enhanced information for participating FM stations
  
  
• A rear-seat entertainment system is available on crew cab models; it combines a dual-play radio system, rear-seat audio controls and a larger, 203 mm (eight-inch) flip-down screen
  
  
• Two touch-screen DVD-based navigation radio systems are offered; one is specific for systems equipped with the rear-seat entertainment system
  
  
• OnStar with Turn-by-Turn Navigation.

Powertrain

The standard engine is a 6.0L gas V-8 with variable valve timing. It is rated at a best-in-class 353 horsepower (263 kW) and 373 lb.-ft. of torque (506 Nm)* on single rear-wheel configurations (up to 4,536 kg / 10,000 pounds gross vehicle weight rating). Variable valve timing helps improve performance and fuel economy.

A Hydra-Matic 6L90 six-speed automatic transmission is paired with the engine. This powertrain combination offers a higher maximum gross combined weight rating (GCWR) - 8,392 kg (18,500 pounds) - than previous gas-powered combinations and is the segment leader for vehicles with a V-8 gas engine. The 6L90 has a wide, 6.04:1 overall ratio - including two overdrive gears - that helps deliver an excellent balance of performance and fuel economy. It also offers manual range selection and tap up/tap down control.

A cleaner, more powerful Duramax 6.6L turbo-diesel engine is available. It continues to lead the segment in power and torque, with power ratings of 365 horsepower (272 kW) and 660 lb.-ft. of torque (895 Nm). Upgrades to the engine introduced in '07 include a diesel particulate filter system that helps provide a 90-percent reduction in particulate matter and a 50-percent reduction in NOx (compared with pre-2007 standards), meeting a new federal government mandate that went into effect on Jan. 1, 2007.

The renowned Allison 1000 six-speed automatic transmission is partnered with the Duramax 6.6L turbo-diesel engine. It delivers good fuel economy, quietness and control. It features a class-first range selection function, which allows the driver to easily select the desired gears to match driving conditions, such as towing a trailer on a steep grade.

Chassis and driving experience

Working in concert with the powertrains are a strong chassis and responsive suspension systems. The vehicle frame is comprised of a sturdy ladder design that is reinforced with cross braces. It features a segmented design that enables easy and accurate adaptation of numerous lengths to accommodate the trucks' five wheelbase lengths. The frame sections are joined with strong, overlapping segments that bolster overall strength and rigidity.

The strength of the frame and enhanced capabilities enabled by the powertrain systems allow the Sierra heavy-duty trucks to offer a larger, 63.5 mm (2.5-inch) trailer hitch receiver platform. This enables the trucks to pull a segment-leading maximum of 5,897 kg (13,000 pounds) with conventional trailers. Trucks with fifth-wheel hitches can tow up to 7,575 kg (16,700 pounds), when properly equipped.

Additional features:

• All 2500HD and 3500HD models ride on a wide, 1,742 mm (68.6-inch) front track. The rear track on 2500HD trucks is 1,676 mm (66 inches); the rear track on 3500HD models is 1,897 mm (74.7 inches), giving Sierra heavy-duty models a firmly planted feel.
  
  
• Two suspension packages: Z85 and Z71. The Z85 suspension is standard on 2WD and 4WD models; the Z71 Off Road suspension is optional and includes additional chassis and suspension equipment, including skid plates.
  
  
• A recirculating ball steering system delivers a confident feeling of control and on-centre feel.
  
  
• A high capacity, four-wheel disc brake system with Hydroboost and four-wheel ABS is standard on all models. The brake system includes large-diameter front and rear disc rotors and stiff brake calipers.

All heavy-duty models are available with an integrated trailer brake controller. It is integrated with the ABS system and provides immediate and measured brake force signalling to electric-controlled trailer brake systems. There is no requirement for external and/or aftermarket brake control systems. The brake controller switch is conveniently mounted on the lower-left section of the instrument panel. Certain electric over hydraulic trailer brakes require specific controllers. Please verify with the trailer manufacturer.

Safety details

Sierra heavy-duty models are designed to help drivers avoid crashes and protect passengers in the event one occurs. The robust ladder frame and strong body structure provide occupant protection. The body structure incorporates the strategic use of high-strength steel and structural adhesives designed to help maintain passenger compartment integrity and manage energy in a crash.

Additional safety features include:

• Frontal air bags are standard on all models
• Segment-first front safety belt pretensioners with both front and rear crash sensing
• A standard, high capacity four-wheel disc brake system with four-channel ABS system provides superior stopping capability
• Ultrasonic Rear Parking Assist system is available and provides visual (LED lights) and audible warnings of objects behind the vehicle
• Tire pressure monitoring system is standard on all models except Dually
• Segment-exclusive factory-installed remote vehicle starting system is available on most models
• Power-adjustable pedals complement increased front seat fore/aft travel to enable smaller-stature drivers to find an optimized driving position

All models come standard with the OnStar Generation 7 system, including a one-year subscription to the Safe & Sound plan. The OnStar service includes the General Motors Advanced Automatic Crash Notification (AACN) system, making crash data available to emergency services to potentially dispatch the appropriate life-saving personnel and equipment to crash scenes faster. If the vehicle is in a crash that activates an air bag, the OnStar system automatically notifies an OnStar advisor, who will check on the occupants or summon emergency help if necessary. OnStar also can assist authorities in locating a vehicle if it is reported stolen and provides remote door-unlocking service (when the vehicle is equipped with power locks).

* SAE certified.

# # #

Contacts:
GM of Canada Communications
Tony LaRocca
Phone: 905-644-1804
Fax: 905-644-3873
E-mail: tony.larocca@gm.com

---

STANDARD AND OPTIONAL FEATURES

EXTERIOR FEATURES	WT	SLE	SLT	Denali
Bumpers - front, chrome with black top cap	S	-	-	-
Bumpers - front, chrome with body-colour top cap	-	S	S	S
Bumper - rear, chrome with step pad	S	S	S	-
Bumper - rear, body-colour	-	-	-	S
Cargo management pickup box - includes aluminum front and side C-channel rails in pickup box	O	O	O	O
Fog lights (except 3500HD 4x4 models; optional on HD with SL Package except dual rear wheel)	-	S	S	S
Glass - Solar-Ray tinted, all windows	S	S	S	S
Glass - deep-tinted on all windows behind front doors	O	S	S	S
Grille - 1500; moulded plastic with black surround	S	-	-	-
Grille - moulded plastic with chrome surround (standard on 2500HD/3500HD; included with SL Convenience Package)	O	S	S	-
Grille - full chrome	-	-	-	S
Mirrors - manual foldaway, black	S	-	-	-
Mirrors - manual foldaway, power remote control, heated, black	-	S	-	-
Mirrors - power folding, integral turn signal indicators, electrochromic auto-dimming driver's side, body-coloured (not available on 3500HD with dual rear wheels); includes curb tilt feature	-	-	S	S
Mirrors - camper-style, manual extending, black	O	-	-	-
Mirrors - deluxe wide-load, vertical glass, heated with integrated turn signal, manual extending and folding with lower convex spotter glass, black	-	O	O	-
Mouldings - bodyside, body-coloured (except Reg. Cab models)	-	S	S	-
Mouldings - bodyside, body-coloured with chrome insert	-	-	-	S
Recovery hooks - two front (except 2WD WT 1500 models - available)	S	S	S	S
Skid plates - off-road, includes shields for engine, transmission, transfer case and front differential, included with Z71 suspension (4x4 only)	O	O	O	S
Sunroof - power, with express-open, includes universal home remote and short overhead console (Ext. and Crew Cab; requires SLE Convenience Package)	-	O	O	O
Tires - P245/70R17 all-season, 1500 2WD models	S	S	S	-
Tires - P265/70R17 all-season, 1500 4x4 models	S	S	S	-
Tires - LT245/75R16 all-season, 2500HD	S	S	-	-
Tires - LT265/75R16 on-off road, 3500HD Single Rear Wheels	S	S	-	-
Tires - LT265/70R17 all-terrain, 2500HD/3500HD Single Rear Wheels	-	O	S	-
Tires - LT225/75R17 highway, 3500HD Dual Rear Wheels	S	S	S	-
Tires - P265/65R18 all-season	-	-	-	S
Tire - spare tire carrier - locking, rear underbody, winch-mounted; bumper equipment and spare tire carrier deleted when box delete is ordered	O	S	S	S
Wheel - 17" painted steel	S	-	-	-
Wheel - 17" chrome-style	O	S	-	-
Wheel - 17" deluxe aluminum	-	O	-	-
Wheel - 17" sport aluminum	-	O	S	-
Wheel - 18" polished aluminum	-	-	-	S
Wheel - 20" machined bright aluminum (short and standard box models only)	-	O	O	-
Wheel - 20" chrome aluminum	-	-	-	O
Windshield washer fluid system - heated (included with available Up-level SLE Convenience Package)	-	O	S	S
Windshield wipers - variable delay (intermittent), flat-blade with wet arm washers	S	S	-	-
Windshield wipers - Rainsense moisture sensitive, flat-blade with wet arm washers (1500 Crew Cab only; included with available Up-level SLE Convenience Package)	-	O	S	S
SL Package - 1500; includes 17" chrome-style steel wheels and chrome centre caps, chrome grille surround and fog lights	O	-	-	-
SL Value Package – 1500: includes 4.8L V8 engine, 4-speed automatic transmission, manual transfer case, 17” chrome appearance wheel, P245/70R17 and P26570R17 ALS blackwall tires, body-side body-coloured moulding, chrome surround grille, 40/20/40 split front bench with driver manual lumbar, manual single zone air-conditioning, front chrome bumpers with body coloured end caps, power windows and door locks, remote keyless entry, ETR AM/FM stereo with MP3 and CD player, cruise control, deep tinted glass, colour-keyed carpeting and OSRV LH/RH heated power adjusting mirrors (Ext. Cab)	O	-	-	-
SL Package - 2500HD/3500HD; includes power door locks, remote keyless entry system, fog lights, AM/FM stereo with CD player; 2500HD and 3500HD Single Rear Wheel models include 16" chrome-style wheels with chrome centre cap, 3500HD Double Rear Wheel features chrome overlay and centre cap	O	-	-	-
Sierra All Terrain Package - includes "All Terrain" badging on front fenders, floor mats and door sills, unique instrument panel, chrome grille insert and surround, body-coloured side moulding with chrome top insert, 18-inch chrome-clad aluminum wheels, P265/65R18 On/Off-Road tires, Z71 Off-Road Suspension, full-feature body-coloured exterior rear-view mirrors and heated windshield washing fluid system	-	O	O	-

INTERIOR FEATURES	WT	SLE	SLT	Denali
Air conditioning - single-zone, manual climate control (Ext. and Crew Cabs)	O	S	-	-
Air conditioning - dual-zone, automatic climate control (Ext. and Crew Cabs; requires SLE Convenience Package)	-	O	S	S
Console - overhead deluxe	S	S	S	S
Cruise control - electronic with resume, coast and decelerate/accelerate features	O	S	S	S
Defogger - electric, rear-window	O	S	S	S
Floor covering - vinyl, graphite rubberized coating	S	O	-	-
Floor covering - colour-keyed carpeting and removable vinyl floor mats (includes rear mats in Ext. and Crew Cab)	O	S	S	-
Floor covering - colour-keyed carpeting and removable floor mats (includes rear mats)	-	-	-	S
Instrument panel - standard with upper and lower glove compartments	S	S	-	-
Instrument panel - premium with single glove compartment	-	-	S	S
Instrumentation - analogue gauge cluster (speedometer, tachometer, engine temperature and fuel) (std. on all 2500/3500 HD pickups)	S	S	S	S
Instrumentation - includes voltmeter and oil pressure (std. on all 2500/3500 HD pickups)	-	S	S	S
Instrumentation - tire pressure monitoring system (except spare tire and 3500HD Dual Rear Wheels models)	S	S	S	S
Instrumentation - Driver Information Centre, comprehensive multi-language system with trip odometer, engine hour meter, transmission temperature, GM Oil Life Monitoring System and visual and audible reminders/warnings	S	S	S	S
Mirror - rear-view, electrochromic auto-dimming with compass and exterior temperature displays	-	S	S	S
Personalization features - including automatic locking/unlocking, seat position recall, perimeter lighting, exit lighting, remote door lock/unlock feedback and curb view assist exterior mirrors	-	-	S	S
Steering column - tilt adjustable	S	S	S	S
Steering wheel - leather-wrapped	-	S	S	-
Steering wheel - sound system controls (requires SLE Convenience Package)	-	O	S	-
Steering wheel - leather-wrapped with wood accents, heated	-	-	-	S
Sunshades - LH and RH, padded, colour-keyed cloth; LH with pocket, RH with visor mirror	S	-	-	-
Sunshades - LH and RH, padded, colour-keyed cloth with illuminated visor mirrors	-	S	S	S
Windows - front, power with passenger lock-out feature	-	S	S	S
Windows - front, includes driver express-down feature	-	S	-	-
Windows - front, includes driver and passenger express-down feature	-	-	S	S
Windows - rear side, fixed (Ext. Cab)	S	-	-	-
Windows - rear side, manual drop glass (Crew Cab)	S	-	-	-
Windows - rear side, power drop glass (Ext. and Crew Cab)	-	S	S	S
Window - rear sliding, power operated (Ext. and Crew Cab; deletes electric rear-window defroster, when specified)	-	O	O	O
Universal home remote - 3-channel transmitter	-	O	S	S
WT Convenience Package - 1SA - 1500 only; includes power door locks, remote keyless entry system and AM/FM stereo with CD player	O	-	-	-
SLE Convenience Package - 1SB - includes remote vehicle starter system, steering wheel-mounted sound system controls and 4 Driver Information Centre (DIC) menu buttons located on the instrument panel and dual-zone automatic climate controls on Ext. and Crew Cabs, 1500 models also add 17" sport aluminum wheels	-	O	-	-
Up-level SLE Convenience Package – 1SC - includes remote vehicle starter system, heated window washer fluid, universal home remote, sport aluminum wheels and on all models except 3500HD with dual rear wheels, exterior mirrors with power remote control, heated, power folding and integral turn signal indicators	-	O	-	-

SEATS	WT	SLE	SLT	Denali
Front 40/20/40 split-bench with driver and front passenger manual recliners, centre fold-down armrest, vinyl or cloth trim, includes driver manual lumbar with cloth trim	S	-	-	-
Front 40/20/40 split-bench, driver and front passenger manual recliners, driver manual lumbar, centre fold-down armrest with storage, lockable storage compartment in centre seat cushion (includes auxiliary power outlet), seatback storage pockets on Ext. and Crew Cab models; available in Custom cloth or with leather seat inserts; rear folding seat includes vinyl trim on Ext. Cab models and leather-appointed on Crew Cab models when ordered with leather seat inserts	-	S	-	-
Front bucket seats, includes power 6-way driver and front passenger seat adjusters, front passenger manual recliner, driver manual lumbar, centre console and seatback storage pockets; available in Custom cloth or with leather-appointed seating; rear folding seat includes vinyl trim on Ext. Cab models and leather-appointed on Crew Cab models when ordered with leather inserts	-	O	-	-
Front buckets with leather-appointed seating, includes power 10-way driver and front passenger seat adjusters, power 2-way lumbar adjusters, power bolsters, heated seat cushions and seatbacks, 2-position driver memory, centre floor console and seatback storage pockets; rear folding seat includes vinyl trim on Ext. Cab models and leather-appointed on Crew Cab models	-	-	S	S
Rear stadium-style fold-up bench seat on Ext. Cab - 60/40 split folding on SLE and SLT	S	S	S	S
Rear stadium-style fold-up bench seat on Crew Cab - 60/40 split folding	S	S	S	S

ENTERTAINMENT	WT	SLE	SLT	Denali
AM/FM stereo with seek/scan and digital clock	S	-	-	-
ETR AM/FM stereo with CD player, seek/scan, MP3 playback compatible, auto tone control, speed-compensated volume, auxiliary audio input jack, Radio Data System (RDS), TheftLock and digital clock	O	S	-	-
Electronically tuned AM/FM stereo with in-dash 6-disc CD changer, seek/scan, MP3 playback compatible, auto tone control, speed-compensated volume, auxiliary audio input jack, Radio Data System (RDS), TheftLock and digital clock plus includes Bose speaker system with subwoofer	-	O	S	S
Electronically tuned AM/FM stereo with CD/DVD player, seek/scan, MP3 playback compatible, auto tone control, speed-compensated volume, auxiliary audio input jack, Radio Data System (RDS), TheftLock and digital clock with single slot CD player, rear-seat audio controls and earphone jacks; also includes Rear Entertainment System with DVD player, remote control, overhead LCD display, 2 sets of 2-channel wireless infrared headphones and auxiliary audio/video input jacks (Crew Cab models only; deletes in-dash 6-disc CD changer on SLT)	-	O	O	O
Navigation radio with voice recognition, includes AM/FM stereo with CD player, seek/scan, auxiliary audio MP3 playback compatible, auto tone control, speed-compensated volume, auxiliary audio input jack, Radio Data System (RDS), TheftLock, digital clock and Bose speaker system with subwoofer (Ext. and Crew Cab models); Crew Cab models include rear-seat audio controls (deletes in-dash 6-disc CD changer on SLT) (Detailed map coverage is available for most major urban areas of the United States and for certain metropolitan areas of Canada: Vancouver, Calgary, Edmonton, Winnipeg, Windsor, London, Toronto, Ottawa, Montreal, Quebec City and Halifax. Coverage is significantly limited outside these areas.)	-	O	O	O
Navigation radio with voice recognition, includes AM/FM stereo with CD/DVD player, seek/scan, auxiliary audio MP3 playback compatible, auto tone control, speed-compensated volume, auxiliary audio input jack, Radio Data System (RDS), TheftLock, digital clock and Bose speaker system with subwoofer (Ext. and Crew Cab models); Crew Cab models include rear-seat audio controls, Rear Entertainment System with DVD player, remote control, overhead LCD display, 2 sets of 2-channel wireless infrared headphones and auxiliary audio/video input jacks (deletes in-dash 6-disc CD changer on SLT) (Detailed map coverage is available for most major urban areas of the United States and for certain metropolitan areas of Canada: Vancouver, Calgary, Edmonton, Winnipeg, Windsor, London, Toronto, Ottawa, Montreal, Quebec City and Halifax. Coverage is significantly limited outside these areas.)	-	O	O	O
4-speaker sound system (Reg. Cab models)	S	S	-	-
6-speaker up-level performance sound system (Ext. and Crew Cab models)	S	S	-	-
Bose Premium sound system with subwoofer (Ext. and Crew Cab models)	-	O	S	S
XM Satellite Radio (includes three trial months beyond which service fees apply; available in 10 Canadian provinces and 48 contiguous United States; includes AM/FM stereo with CD player on WT Extended and Crew Cab models)	O	O	S	S
Rear-seat audio controls and earphone jacks (Crew Cab only)	-	O	S	S

MECHANICAL	WT	SLE	SLT	Denali
Air cleaner - high capacity (standard on all 2500HD/3500HD)	O	O	S	-
Brakes - 1500; power, front disc/rear drum with 4-wheel anti-lock braking system (ABS) and dynamic rear proportioning (DRP); rear disc brakes on Crew and Ext. Cabs when equipped with the VortecMAX 6.0L V8 engine and StabiliTrak	S	S	S	-
Brakes - 2500HD/3500HD; hydro-boost power, 4-wheel disc with anti-lock braking system (ABS)	S	S	S	-
Brakes - hydro-boost power, 4-wheel disc with anti-lock braking system (ABS) and dynamic rear proportioning (DRP)	-	-	-	S
Vortec 4.3L V6 - Reg. Cab standard and long box, 2WD and 4x4; Ext. Cab short and standard box 2WD only	O	-	-	-
Vortec 4.8L V8 - Reg. Cab standard and long box, 2WD and 4x4; Ext. Cab short and standard box, 2WD and 4x4 and Crew Cab short box 2WD and 4x4	S	S	-	-
Vortec 5.3L V8 - Reg. Cab standard and long box, 2WD and 4x4	O	O	-	-
Vortec 5.3L V8 - Ext.Cab short and standard box, 2WD and 4x4; Crew Cab short box, 2WD and 4x4	O	O	S	-
Vortec 5.3L V8 - Ext. Cab long box, 2WD and 4x4	S	S	S	-
Vortec 6.0L V8 - Ext. Cab short and standard box, 2WD and 4x4; Crew Cab short box, 2WD and 4x4	-	O	O	-
Vortec 6.2L V8	-	-	-	S
Engine - block heater	S	S	S	S
Exhaust system - aluminized stainless steel muffler and tailpipe	S	S	S	S
Locking differential - rear	O	O	S	S
StabiliTrak – electronic stability control system with Proactive Roll Avoidance and traction control (standard on Crew Cab; optional on Ext. cab)	-	O	O	S
Steering - 1500; power, rack-and-pinion	S	S	S	S
Steering - 2500HD/3500HD; power recirculating ball	S	S	S	-
Suspension - Solid Smooth Ride (Z83)	S	-	-	-
Suspension - Handling/ Trailering (Z85)	O	S	S	-
Suspension – High Performance (Z60) – not available on Reg. and Ext. Cab long box 2WD and 4x4 models (included and only available with 20” wheels)	-	O	O	S
Suspension - Off Road (Z71)	-	O	O	-
Trailer wiring provisions - includes additional 7-way wiring harness to front of pickup box (requires Trailering Special Equipment Package)	O	O	O	S
Transfer case 4x4 models - lever operated, 2-speed manual	S	-	-	-
Transfer case 4x4 models - 1500; Autotrac with electronic rotary dial	-	S	S	-
Transfer case 4x4 models - 2500HD/3500HD; 2-speed with electronic rotary dial	-	S	S	-
Transfer case - all-wheel-drive system, full-time	-	-	-	S
Transmission - 1500; 4-speed automatic with overdrive and Tow/Haul mode; super-duty transmission when equipped with the VortecMAX 6.0L V8 engine	S	S	S	-
Transmission - 2500HD/3500HD; 6-speed automatic with 2 overdrives, tap up/tap down shift control and Tow/Haul mode; Allison 1000 Series 6-speed automatic required with Duramax Diesel engine	S	S	S	-
Transmission -6-speed heavy-duty automatic, tap up/tap down shift control, heavy-duty cooler and Tow/Haul mode	-	-	-	S
Vehicle starter system - remote (included with SLE Convenience Package)	-	O	S	S
Snow Plow Prep Package –15 amp wiring for roof-mounted light with forward harness, instrument wiring harness for an electric brake controller, high-airflow front bumper (std. on 2500HD and 3500HD) and skid plate package; 160 amp alternator with Vortec V8 engines; dual 125 amp alternators with Duramax 6.6L V8 Turbo Diesel, available 1500 Reg. Cab 4x4 only and 2500HD/3500HD 4x4 only and diesel engine restricted to Reg. Cab models (not available with 4.3L V6 engine)	O	O	-	-
Tailgate Package - includes EZ Lift tailgate, lockable	-	O	O	S
Trailering Special Equipment Package – includes weight-distributing trailer hitch platform with a 2-inch receiver on 1500 models and 2.5-inch receiver with a 2-inch adapter on 2500HD/3500HD models; also includes a 7-wire harness with independently fused trailering circuits mated to a 7-way sealed connector plus IP panel wiring for an aftermarket trailer brake controller (except 2500HD/3500HD equipped with an integrated trailer brake control) and a lead for a centre high-mounted stop light; includes extra capacity transmission cooling and a high-capacity air cleaner if not already equipped	O	O	S	S
VortecMAX Performance Package (NHT) - available on 1500 Extended Cab standard box and Crew Cab short box SLE and SLT models, includes: increased Gross Vehicle Weight Ratings (GVWRs), VortecMAX 6.0L V8 engine, engine oil cooler, high-capacity air cleaner, heavy-duty 9.5" rear axle, 4-wheel disc brakes with 4-wheel ABS, 4-speed super-duty automatic transmission with auxiliary oil cooler, Z85 increased capacity suspension, locking rear differential, P265/70R17 on/off-road tires, StabiliTrak electronic stability control system and Trailering Special Equipment Package	-	O	O	-

SAFETY AND SECURITY	WT	SLE	SLT	Denali
Air bags - 1500; dual-stage, driver and right front passenger, frontal; includes front Passenger Sensing System with automatic air bag suppression	S	S	S	S
Air bags - 2500HD/3500HD; driver and right front-passenger, frontal with passenger side shut off for Reg. & Ext. Cabs (key switch in glove box)	S	S	S	-
Air bags - 1500; front-to-rear, side head curtain with rollover sensor	-	O	O	S
Door locks - power, programmable with lock-out protection (included with WT Convenience and SL Packages)	O	S	S	S
Headlights - dual composite halogen - Daytime Running Lights with automatic light control	S	S	S	S
Keyless entry system - remote, programmable, includes two transmitters with Panic alarm feature (included with WT Convenience and SL Packages)	O	S	S	S
OnStar In-Vehicle Communications and Assistance Service - includes one-year Safe & Sound Plan; Turn-By-Turn navigation capable (Turn-By-Turn requires upgrade to Directions & Connections, availability impacted by some geographic/cellular limitations); advisor assisted routing available	S	S	S	-
OnStar In-Vehicle Communications and Assistance Service - includes one-year Safe & Sound Plan with Turn-By-Turn navigation (Turn-By-Turn requires upgrade to Directions & Connections, availability impacted by some geographic/cellular limitations); advisor assisted routing available	-	-	-	S
Safety restraints - LATCH (Lower Anchors and top Tethers for Children) - Ext. and Crew Cab only	S	S	S	S
Theft-deterrent system - electronic immobilizer	S	S	S	S
Ultrasonic rear parking assist - rear obstacle detection system with audible/visible warning, included in Safety Package on Ext. and Crew Cab only	-	O	O	S
Warranty - 3 year / 60,000 km, complete base warranty coverage (Whichever comes first, to correct any defects in materials or workmanship occurring during the warranty period. Regular maintenance is not included. Other restrictions, exclusions and limitations apply. See your dealer for complete details of the GM New Vehicle Limited Warranty.)	S	S	S	S
Warranty - 5 year / 160,000 km, powertrain component warranty with $0 deductible (Whichever comes first. Conditions and limitations apply. See your dealer for details.)	S	S	S	S
Safety Package - includes power adjustable pedals, ultrasonic rear parking assist; 1500 also includes front to rear side head curtain air bags (Ext. and Crew Cab models)	-	O	O	S

S - Standard Equipment. O - Optional Equipment. (Subject to change at any time.)

---

SPECIFICATIONS - 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, long box, 2WD & 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:	Pontiac, Mich.; Flint, Mich.
Key competitors:	Ford Super Duty Series pickup, Dodge Ram heavy duty pickup

Engines

	Vortec 6.0L V-8 (LY6)	Duramax 6.6L V-8 (LMM)
Type:	6.0L V-8	6.6L V-8
Displacement (cc / cu in):	5967 / 364	6599 / 403
Bore & stroke (mm / in):	101.6 x 92 / 4.00 x 3.62	103 x 99 / 4.06 x 3.9
Block material:	Cast iron	Cast iron
Cylinder head material:	Cast aluminum	Cast aluminum
Valvetrain:	OHV	OHV
Ignition system:	Coil-near-plug, extended life 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	16.8:1
Horsepower (hp / kW @ rpm):	353 / 263 @ 5400*	365 / 272 @ 3200
Torque (lb-ft / Nm @ rpm) :	373 / 506 @ 4400*	660 / 895 @ 1600
Recommended fuel:	Regular unleaded	Diesel
Maximum engine speed (rpm):	6000	3450
Emissions controls:	3-way catalytic converter, positive crankcase ventilation, evaporative collection system	turbocharged, intercooled, catalytic converter system; diesel particulate filter system with regeneration

Transmissions

	Hydra-Matic 6L90	Allison 1000
Type:	6-speed automatic (w/ Vortec 6.0L)	6-speed automatic (w/ 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:	Vortec 6.0L: 3.73 or 4.10 Duramax 6.6L: 3.73

Chassis/Suspension

Front:	All models: std long- and short-arm independent front torsion bar suspension
Rear:	Semi-elliptic 2-stage multi-leaf spring
Steering type:	Integral power-assisted recirculating ball
Steering ratio:	24:1
Steering wheel turns, lock-to-lock:	3.14

Turning Circle

	Regular Cab	Extended Cab	Crew Cab
Turning circle, curb-to-curb (m / ft):
Standard box	--	14.5 / 47.6 (2WD & 4WD)	15.6 / 51.2 (2WD & 4WD)
Long box	13.8 / 45.3 (2WD & 4WD)	16.0 / 52.5 (2WD & 4WD)	16.8 / 55.1 (2WD & 4WD)

Brakes

Type:	Power-assisted, Hydroboost brake-apply system, 4-wheel disc, 4-wheel ABS
Rotor diameter x thickness (mm / in):	front: 325 x 38 / 12.8 x 1.5 rear: 325 x 30 / 12.8 x 1.2
Total swept area (sq cm / sq in):	front: 1584 / 245.5 rear: 1517 / 235.1

Wheels/Tires

Wheel size and type:	16-inch x 6.5-inch steel 16-inch x 6.5-inch steel chrome-clad 16-inch x 6.5-inch forged aluminum 17-inch x 7.5-inch bright machined
Tire size:	LT245/75R16 LT265/65R17

Dimensions

Exterior

	Regular Cab Long Box	Extended Cab Standard Box	Extended Cab Long Box	Crew Cab Standard Box	Crew Cab Long Box
Wheelbase (mm / in):	3378 / 133	3645 / 143.5	4001 / 157.5	3886 / 153	4242 / 167
Overall length (mm / in):	5708 / 224.7	5850 / 230.3	6330 / 249.2	6094 / 240	6572 / 258.7
Overall width (mm / in):	2032 / 80	2032 / 80	2032 / 80	2032 / 80	2032 / 80
Overall height: (mm / in):	1939 / 76.3	1951 / 76.8	1946 / 76.6	1958 / 77.1	1949 / 76.7
Track - front (mm / in):	1744 / 68.6	1744 / 68.6	1744 / 68.6	1744 / 68.6	1744 / 68.6
Track - rear (mm / in):	1676 / 66	1676 / 66	1676 / 66	1676 / 66	1676 / 66
Minimum ground clearance (mm / in):	2WD: 243 / 9.5 4WD: 243 / 9.5	2WD: 243 / 9.5 4WD: 243 / 9.5	2WD: 243 / 9.5 4WD: 243 / 9.5	2WD: 243 / 9.5 4WD: 243 / 9.5	2WD: 243 / 9.5 4WD: 243 / 9.5
Step-in height (mm / in):	824 / 32.4	824 / 32.4	824 / 32.4	824 / 32.4	824 / 32.4

Weight Ratings

	GVWR (kg / lb)	Curb Weight (kg / lb)	Payload (kg / lb)
Reg cab, long box (2WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2408 / 5308 6.6L: 2712 / 5980	6.0L: 1765 / 3892 6.6L: 1460 / 3220
Reg cab, long box (4WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2519 / 5554 6.6L: 2840 / 6261	6.0L: 1649 / 3636 6.6L: 1333 / 2939
Ext cab, std. box (2WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2538 / 5596 6.6L: 2871 / 6330	6.0L: 1635 / 3604 6.6L: 1302 / 2870
Ext cab, std. box (4WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2652 / 5847 6.6L: 2998 / 6609	6.0L: 1521 / 3353 6.6L: 1175 / 2591
Ext cab, long box (2WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2601 / 5735 6.6L: 2941 / 6484	6.0L: 1572 / 3465 6.6L: 1232 / 2716
Ext cab, long box (4WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2724 / 6006 6.6L: 3064 / 6756	6.0L: 1449 / 3194 6.6L: 1108 / 2444
Crew cab, std. box (2WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2604 / 5742 6.6L: 2930 / 6459	6.0L: 1568 / 3458 6.6L: 1243 / 2741
Crew cab, std. box (4WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2714 / 5983 6.6L: 3047 / 6718	6.0L: 1459 / 3217 6.6L: 1126 / 2482
Crew cab, long box (2WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2676 / 5899 6.6L: 2993 / 6599	6.0L: 1497 / 3301 6.6L: 1180 / 2601
Crew cab, long box (4WD):	6.0L: 4173 / 9200 6.6L: 4173 / 9200	6.0L: 2798 / 6169 6.6L: 3132 / 6906	6.0L: 1375 / 3031 6.6L: 1040 / 2294

Cargo Box

	Standard Box	Long Box
Cargo volume (L / cu ft):	1718 / 60.7	2138 / 75.5
Length at floor (mm / in):	1999 / 78.7	2479 / 97.6
Width at floor (mm / in):	1586 / 62.4	1586 / 62.4
Tailgate width (mm / in):