The Chevrolet Silverado 2500HD II, specifically the Crew Cab Standard Box configuration with the 6.6-liter Duramax Turbo Diesel V8 engine producing 397 horsepower, represents a significant iteration of Chevrolet’s heavy-duty pickup truck lineage. Produced from 2011 to 2014, this variant falls within the GMT900 platform’s facelifted generation, offering a blend of robust capability, improved refinement, and diesel-specific features aimed at the demanding North American truck market. This particular trim level positioned itself as a premium offering within the 2500HD range, appealing to buyers needing substantial towing and hauling capacity without sacrificing interior space or comfort.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 2500 HD |
| Generation | Silverado 2500 HD II (GMT900, facelift 2011) Crew Cab Standard Box |
| Type (Engine) | 6.6 Duramax TD V8 (397 Hp) 4WD Automatic |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 8.3 kg/Hp, 120 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 313.5 Nm/tonne |
| Power | 397 Hp @ 3000 rpm |
| Power per litre | 60.2 Hp/l |
| Torque | 1037 Nm @ 1600 rpm (764.85 lb.-ft. @ 1600 rpm) |
| Maximum engine speed | 3000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Duramax LML |
| Engine displacement | 6599 cm3 (402.7 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103 mm (4.06 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | OHV |
| Engine oil capacity | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Coolant | 24 l (25.36 US qt | 21.12 UK qt) |
| Kerb Weight | 3308 kg (7292.89 lbs.) |
| Max. weight | 4536 kg (10000.17 lbs.) |
| Max load | 1228 kg (2707.28 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) | 208 mm (8.19 in.) |
| Minimum turning circle (turning diameter) | 15.4 m (50.52 ft.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| Number of gears and type of gearbox | 6 gears, automatic transmission Allison |
| 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 Silverado 2500HD variant lies the Duramax LML 6.6-liter turbocharged diesel V8. This engine represents a significant evolution of the Duramax design, incorporating a variable geometry turbocharger (VGT) for improved responsiveness and efficiency. The LML featured a redesigned combustion chamber, stronger connecting rods, and a more robust cooling system compared to its predecessors. Fuel is delivered via a high-pressure common rail diesel injection system, enabling precise fuel metering and optimized combustion. The engine utilizes an overhead valve (OHV) valvetrain, a design choice favored for its durability and packaging efficiency in a truck application. The Allison 6-speed automatic transmission, known for its robustness and ability to handle high torque loads, is paired with the Duramax engine. This transmission features electronically controlled shifts and a lock-up torque converter for improved fuel economy.
Driving Characteristics
The 397 horsepower and 765 lb-ft of torque produced by the Duramax LML engine, coupled with the Allison automatic transmission, delivers a commanding driving experience. While not as overtly quick as gasoline-powered counterparts, the Silverado 2500HD excels in situations demanding substantial pulling power. The automatic transmission is tuned for smooth shifts and efficient operation, prioritizing usability over outright performance. The gear ratios are optimized for towing, providing ample low-end torque for effortless acceleration even when hauling heavy loads. Compared to the 6.0L gasoline V8 option, the Duramax offers significantly more torque, making it the preferred choice for those regularly engaging in demanding work. Compared to the 2500HD models equipped with the manual transmission, the automatic provides a more relaxed driving experience, particularly in stop-and-go traffic.
Equipment & Trim Levels
The Crew Cab Standard Box configuration offered a spacious interior with seating for five passengers. Standard features typically included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Higher trim levels, such as the LT and LTZ, added features like leather upholstery, heated seats, a premium audio system, navigation, and a rear vision camera. The Silverado 2500HD also offered a range of optional extras, including a sunroof, upgraded wheels, and various towing packages. The interior design was functional and durable, prioritizing practicality over luxury.
Chassis & Braking
The Silverado 2500HD II utilizes a body-on-frame construction, providing a robust and durable platform for heavy-duty applications. 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 provides a comfortable ride while maintaining excellent load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when heavily loaded. An Anti-lock Braking System (ABS) is standard, enhancing safety and control. The chassis is designed to withstand the stresses of demanding work, ensuring long-term reliability.
Market Reception & Comparison
The 2011-2014 Chevrolet Silverado 2500HD with the Duramax diesel engine and Allison automatic transmission was well-received by critics and consumers alike. It was praised for its powerful engine, smooth transmission, and comfortable ride. Fuel economy, while not exceptional, was considered reasonable for a vehicle of its size and capability. Compared to the gasoline-powered Silverado 2500HD, the Duramax diesel offered significantly better fuel economy and towing capacity. However, the diesel engine also carried a higher price tag and potentially higher maintenance costs. Reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) system.
Legacy
The Duramax LML engine and Allison automatic transmission combination has proven to be exceptionally durable and reliable. These powertrains are still highly sought after in the used truck market, commanding premium prices. The 2011-2014 Silverado 2500HD remains a popular choice for those needing a capable and dependable heavy-duty pickup truck. Regular maintenance, including timely oil changes and DPF servicing, is crucial for ensuring the long-term health of this powertrain. The Silverado 2500HD II with the Duramax diesel continues to be a workhorse for many owners, demonstrating the enduring quality and capability of Chevrolet’s heavy-duty truck lineup.
