The GMC Sierra 2500HD III, specifically the Crew Cab Standard Box configuration with the 6.0-liter V8 engine and automatic transmission, represents a significant iteration in GMC’s heavy-duty truck lineage. Produced from 2011 to 2014 as part of the GMT900 platform’s facelift, this variant aimed to balance robust capability with a degree of everyday usability. It occupied a middle ground within the 2500HD lineup, offering more power and towing capacity than the base models, but without the premium price tag and specialized features of the Denali trim. This truck was primarily marketed towards American buyers needing a powerful workhorse for hauling and towing, whether for commercial purposes or personal use like recreational vehicles and boats.
Technical Specifications
| Brand | GMC |
| Model | Sierra 2500HD |
| Generation | Sierra 2500HD III (GMT900, facelift 2011) Crew Cab Standard Box |
| Type (Engine) | 6.0 V8 (360 Hp) 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 | 7.8 kg/Hp, 129 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184.5 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 | 2791 kg, 6153.1 lbs. |
| Max. weight | 4309 kg, 9499.72 lbs. |
| Max load | 1518 kg, 3346.62 lbs. |
| Trunk (boot) space – maximum | 1718 l, 60.67 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 | 6101 mm, 240.2 in. |
| Width including mirrors | 2032 mm, 80 in. |
| Height | 1958 mm, 77.09 in. |
| Wheelbase | 3904 mm, 153.7 in. |
| Front track | 1748 mm, 68.82 in. |
| Rear (Back) track | 1709 mm, 67.28 in. |
| Ride height (ground clearance) | 213 mm, 8.39 in. |
| Minimum turning circle (turning diameter) | 15.4 m, 50.52 ft. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 inch) 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 employs a traditional overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance and efficiency. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering. The engine produces 360 horsepower at 5400 rpm and 515 lb-ft of torque at 4200 rpm. This torque output is particularly crucial for heavy-duty applications. The engine is longitudinally mounted in the chassis, driving the rear wheels through a six-speed Hydra-Matic automatic transmission. This transmission was chosen for its ability to handle the engine’s torque and provide smooth shifting during towing and hauling.
Driving Characteristics
The 6.0L V8 and automatic transmission combination delivers a driving experience focused on capability rather than outright speed. Acceleration is adequate for everyday driving, but the truck truly shines when put to work. The automatic transmission is tuned for smooth, predictable shifts, prioritizing ease of use over aggressive performance. The gear ratios are optimized for towing, providing ample low-end torque to get heavy loads moving. Compared to the available diesel engines in the 2500HD lineup, this gasoline V8 offers less torque but a more responsive feel. Manual transmission versions of the 6.0L provided a slightly more engaging driving experience, but the automatic was favored by many buyers for its convenience, especially when towing. The truck’s substantial weight is noticeable, but the suspension does a reasonable job of absorbing bumps and providing a comfortable ride.
Equipment & Trim Levels
The Crew Cab Standard Box 6.0L Automatic trim typically included standard features such as air conditioning, power windows and locks, a basic audio system, and cloth upholstery. The Crew Cab configuration offered spacious seating for five passengers, making it suitable for both work and family use. Optional extras included upgraded audio systems, leather upholstery, power-adjustable seats, a navigation system, and various towing packages. The Standard Box provided a good balance between cargo capacity and overall vehicle length. While not as luxurious as the Denali trim, this variant offered a comfortable and well-equipped interior for its price point.
Chassis & Braking
The Sierra 2500HD III utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension features an independent torsion bar setup with double wishbone components, while the rear suspension employs a traditional leaf spring design. This configuration is designed to handle heavy loads and provide a stable ride. Braking duties are handled by ventilated disc brakes on all four wheels, with ABS (Anti-lock Braking System) as standard equipment. The front brakes measure 350x40mm, while the rear brakes are 360x34mm. The steering system is a cone worm with recirculation balls, providing a solid and predictable steering feel.
Market Reception & Comparison
The 6.0L V8-equipped Sierra 2500HD received generally positive reviews for its capability and value. Critics praised its strong towing capacity and comfortable ride. However, it was often noted that the gasoline engine offered lower fuel economy compared to the available Duramax diesel engines. The diesel variants were favored by those who frequently towed heavy loads or covered long distances. In terms of reliability, the L96 engine proved to be relatively dependable, although routine maintenance was essential. Compared to competitors like the Ford Super Duty and Ram 2500, the Sierra 2500HD offered a competitive combination of features, performance, and price.
Legacy
The GMT900-based Sierra 2500HD, including the 6.0L V8 Automatic variant, remains a popular choice in the used truck market. The L96 engine is known for its longevity and relatively straightforward maintenance. While fuel economy isn’t a strong point, the truck’s robust construction and ample power make it a capable workhorse. These trucks are often sought after by those needing a reliable and affordable heavy-duty pickup for hauling, towing, and general-purpose use. Parts availability is generally good, and the truck’s simple design makes it relatively easy to repair. The 2011-2014 facelifted models are particularly desirable due to their updated styling and improved features.
