The GMC Sierra 2500HD III, specifically the Crew Cab Long Box configuration with the 6.0-liter V8 engine and four-wheel drive, was a prominent heavy-duty pickup truck produced from 2011 to 2014. This iteration represents a facelift of the GMT900 platform, building upon the foundation laid by its predecessors while incorporating updated styling and features. Positioned as a robust workhorse and capable towing vehicle, the 2500HD series catered to owners requiring substantial payload and towing capacity, making it a popular choice for both commercial and personal use in the North American market.
Technical Specifications
| Brand | GMC |
| Model | Sierra 2500HD |
| Generation | Sierra 2500HD III (GMT900, facelift 2011) Crew Cab Long Box |
| Type (Engine) | 6.0 V8 (360 Hp) 4WD Automatic |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.3 kg/Hp, 120.4 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 172.2 Nm/tonne |
| Power | 360 Hp @ 5400 rpm |
| Power per litre | 60.3 Hp/l |
| Torque | 515 Nm @ 4200 rpm, 379.84 lb.-ft. @ 4200 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Vortec L96 |
| Engine displacement | 5967 cm3, 364.13 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 101.6 mm, 4 in. |
| Piston Stroke | 92 mm, 3.62 in. |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT |
| Engine oil capacity | 5.7 l, 6.02 US qt | 5.02 UK qt |
| Coolant | 15.5 l, 16.38 US qt | 13.64 UK qt |
| Kerb Weight | 2991 kg, 6594.03 lbs. |
| Max. weight | 4490 kg, 9898.76 lbs. |
| Max load | 1499 kg, 3304.73 lbs. |
| Trunk (boot) space – maximum | 2138 l, 75.5 cu. ft. |
| Fuel tank capacity | 136 l, 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 5897 kg, 13000.66 lbs. |
| Length | 6581 mm, 259.09 in. |
| Width including mirrors | 2032 mm, 80 in. |
| Height | 1984 mm, 78.11 in. |
| Wheelbase | 4018 mm, 158.19 in. |
| Front track | 1748 mm, 68.82 in. |
| Rear (Back) track | 1709 mm, 67.28 in. |
| Ride height (ground clearance) | 208 mm, 8.19 in. |
| Minimum turning circle (turning diameter) | 16.7 m, 54.79 ft. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent torsion bar, double wishbone |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 350×40 mm |
| Rear brakes | Ventilated discs, 360×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 20 |
Powertrain & Engine Architecture
At the heart of this Sierra 2500HD variant lies the Vortec L96 engine, a 6.0-liter (364 cubic inches) V8. This engine is a member of the Vortec family, known for its robust construction and relatively simple design. The L96 utilizes a cast iron block and aluminum cylinder heads, contributing to its durability. It features a 9.6:1 compression ratio and employs multi-port fuel injection for precise fuel delivery. The overhead valve (OHV) valvetrain, coupled with variable valve timing (VVT), helps optimize performance and efficiency across a range of engine speeds. The Hydra-Matic 6L80E six-speed automatic transmission was the standard pairing for this engine. This transmission is known for its smooth shifting and ability to handle the high torque output of the L96. The 6L80E features electronically controlled shifting and overdrive capabilities, contributing to both performance and fuel economy.
Driving Characteristics
The 6.0-liter V8, producing 360 horsepower and 380 lb-ft of torque, provided ample power for hauling and towing. While not as quick as lighter-duty pickups, the Sierra 2500HD offered strong acceleration and effortless cruising. The automatic transmission, with its six forward gears, allowed for relatively efficient operation at highway speeds. Compared to the available Duramax diesel engine options, the 6.0L V8 offered a more affordable entry point but lacked the diesel’s superior torque for extremely heavy loads. The automatic transmission, while convenient, didn’t offer the same level of control as a manual transmission, and some drivers noted a slight delay in downshifts when needing to quickly access power. The four-wheel-drive system provided enhanced traction in challenging conditions, making it suitable for both on-road and off-road use.
Equipment & Trim Levels
The Crew Cab Long Box configuration was a well-equipped trim, offering a spacious interior with seating for five passengers. Standard features typically included air conditioning, power windows and locks, a CD player with auxiliary input, and cloth upholstery. Higher trim levels, such as the SLT and Denali, added features like leather upholstery, heated seats, a premium sound system, navigation, and a rearview camera. Optional extras included a sunroof, upgraded wheels, and various towing packages. The interior design was functional and durable, prioritizing practicality over luxury, although the higher trims offered a more refined experience.
Chassis & Braking
The Sierra 2500HD featured a robust chassis designed to withstand heavy loads. The front suspension utilized an independent torsion bar setup with double wishbones, providing a comfortable ride and good handling. The rear suspension employed a traditional leaf spring design, optimized for load-carrying capacity. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. An anti-lock braking system (ABS) was standard, enhancing safety during emergency braking situations. The steering system utilized a cone worm with recirculation balls, offering a solid and predictable feel.
Market Reception & Comparison
The 2011-2014 GMC Sierra 2500HD with the 6.0-liter V8 and automatic transmission was generally well-received by critics and consumers. It was praised for its strong towing capacity, comfortable ride, and spacious interior. However, fuel economy was a common criticism, as the large V8 engine consumed a significant amount of gasoline. Compared to the diesel-powered Sierra 2500HD models, the 6.0L V8 offered a lower purchase price but sacrificed some towing capability and fuel efficiency. It was often seen as a good option for owners who didn’t require the maximum towing capacity of the diesel but still needed a capable heavy-duty pickup.
Legacy
The Vortec L96 engine, while not the most fuel-efficient option, proved to be a reliable and durable powerplant. The 6L80E automatic transmission also demonstrated good long-term reliability. Today, these Sierra 2500HDs can be found on the used car market at relatively affordable prices. They remain popular choices for owners who need a capable and dependable work truck. Common maintenance items include regular oil changes, transmission fluid flushes, and inspections of the suspension and braking systems. Overall, the 2011-2014 GMC Sierra 2500HD Crew Cab Long Box 6.0L V8 4WD represents a solid and capable heavy-duty pickup truck that continues to provide value to its owners.
