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Basic Specs
| Base Price | TBA |
| Drivetrain | Rear Wheel Drive |
| Curb Weight (lbs) | 5768 |
| City (MPG) | TBD |
| Hwy (MPG) | TBD |
| Horsepower | 360@5400 |
| Torque (lb-ft) | 380@4200 |
| Wheelbase | 133.6 |
| Length (in.) | 225.0 |
| Width (in.) | 95.9 |
| Height (in.) | 77.3 |
The most capable heavy-duty truck in GMC's line-up, the Sierra 3500HD, is available with dual rear wheels for serious towing and hauling capabilities. It is positioned above the slightly less rugged Sierra 2500HD and is also available in luxurious Denali form.
Five body / drivetrain styles exist: a Regular Cab 4WD, Extended Cab 2WD or 4WD, Crew Cab with 2WD or 4WD. All could be had with single rear wheels or double. All sport the Long, 97.8-inch box. All body styles are available with one of two engines: a gasoline-fueled Vortec 6.0-liter V8 that is rated at 360 horsepower at 5,400 rpm and 380 lb-ft of torque at 4,400 rpm. The diesel-fueled alternative is a 6.6-liter V8 labeled Duramax, which is built for GM by Isuzu. This oil-burner makes 397 horsepower and a stump-pulling 765 lb-ft of torque at just 1,600 rpm.
The gas engine comes only with a heavy duty six-speed automatic transmission, which includes a tow / haul mode. The Duramax is hitched exclusively to an Allison 1000 six-speed, which also has a tow / haul mode but throws in electronic engine grade braking. Both combinations get a 3.73-ratio rear axle, with a 4.10 axle available for the gasoline-powered 2500HDs only.
All models feature an auxiliary external transmission oil cooler, as well as an external engine oil cooler. Braking is accomplished with discs all around, with anti-lock control across the range.
Rear parking assist is a noteworthy standalone option, as is heated windshield washer fluid.
Making sure to keep this heavy duty truck fresh inside, GMC has added USB connectivity to the center console for music storage and device recharging capability. OnStar has also been updated to the latest standard, including long-range remote start and traffic probe functions.
The maximum payload capacity belongs to the Regular Cab 3500 with 2WD and single rear wheels at 4,632 lbs. Opt for the 4WD "skinny" model and the Extended Cab takes that distinction with a 4,420 lb bed capacity. The strongest dually, is the Regular Cab 4x2 with a bed capacity of 6,635 lbs.
As for towing, ball-hitch maximums are 17,000lbs when the diesel is doing the pulling, or 14,100 with a 4.10 axle on the Regular cab 2WD model with the Vortec V8 under the hood.
Equip the 3500 with a fifth-wheel hitch to tow a gooseneck trailer, (only with the 4.10 axle on gas models) and the numbers don't change for the gas-powered truck, but the diesels is capable of a maximum of 21,500 lbs when in crew cab, 2WD, dual rear wheel guise.
Along with an optional heated steering wheel, heated and cooled leather-appointed seating is available. The exterior is offered in three colors: Black, Stealth Gray and White.
Key Competitors
The Sierra 3500HD squares off against full-size heavy duty pickups such as the semi-like Ford F-350 Super Duty and the Ram 3500.
Similar Cars
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2012 Ram 2500
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2012 GMC Canyon
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2012 GMC Sierra 1500
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2012 GMC Sierra 3500HD
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2012 GMC Sierra 2500HD
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2012 Chevrolet Silverado 1500
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2012 Chevrolet Silverado 2500HD
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2012 Chevrolet Silverado 1500 Hybrid
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2012 Ford F-150
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2012 Ford F-150 SVT Raptor
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2013 Ford Super Duty F-450
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2012 Nissan Frontier
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2012 Ram 3500
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2012 GMC Sierra 3500HD Denali
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- General
- Body Style: Pickup Truck
- Size: Fullsize
- Market Segment: Standard
- Weight: 5768 lbs
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- Exterior
- Length: 225.0 in.
- Width: 95.9 in.
- Height: 77.3 in.
- Wheelbase: 133.6 in.
- Ground Clearance: 8.8 in.
- Front Track: 68.8 in.
- Rear Track: 67.3 in.
- Weight Distribution: TBD
- Drag Coefficient: TBD
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- Interior - General
- Seats: 3
- Passenger Volume: TBD
- Cargo Volume: 60.7 cu. ft.
- Cargo Volume (Seats Folded): N/A
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- Interior - Front Row
- Volume: TBD
- Leg Room: 41.3 in.
- Head Room: 41.2 in.
- Shoulder Room: 65.2 in.
- Hip Room: 60.3 in.
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- Propulsion
- Fuel Type: Gas
- Engine Type: 6.0L V8
- Power: 360 hp @ 5400 rpm
- Torque: 380 lb-ft @ 4200 rpm
- Transmission: 6-Speed Automatic
- Highway Fuel Economy: TBD
- City Fuel Economy: TBD
- Forced Induction: None
- Direct Injection: No
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- Chassis
- Layout: Rear Wheel Drive
- Front Suspension: Torsion-Beam
- Rear Suspension: Solid Axle
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- Wheels
- Front: 18" Steel
- Front Tires: LT265/70R18
- Rear: 18" Steel
- Rear Tires: LT265/70R18
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- Trailering & Hauling
- Trailer Weight: 13000 lbs
- Payload: 4632
- Tongue Weight: TBD
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