The Chevrolet Silverado 3500 HD II, specifically the Crew Cab Standard Box configuration with the 6.6-liter Duramax Turbo Diesel V8 engine paired with an Allison automatic transmission, represents a significant iteration of Chevrolet’s heavy-duty pickup truck lineage. Produced from 2011 to 2014 as part of the GMT900 platform’s facelift, this variant was aimed at buyers needing substantial towing and hauling capacity without sacrificing interior space and comfort. It occupied a premium position within the Silverado 3500 HD lineup, offering a balance between capability and usability for both work and personal use.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Standard Box |
| Type (Engine) | 6.6 Duramax TD V8 (397 Hp) SRW Automatic |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 8.1 kg/Hp, 124.1 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 324.1 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 | 3200 kg (7054.79 lbs.) |
| Max. weight | 5035 kg (11100.27 lbs.) |
| Max load | 1835 kg (4045.48 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 | 1966 mm (77.4 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 | Rear wheel drive. Internal Combustion engine. |
| 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, 355×40 mm |
| Rear brakes | Ventilated discs, 373×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 235/80 R17; 265/70 R18 |
| Wheel rims size | 6.5J x 17; 8J x 18 |
INTRODUCTION
The 2011-2014 Chevrolet Silverado 3500 HD II, in its Crew Cab Standard Box configuration with the 6.6L Duramax diesel and Allison automatic, represented a significant upgrade over previous generations. Built on the GMT900 platform, this facelifted version brought enhanced styling, a more refined interior, and improved capabilities. The Silverado 3500 HD series was Chevrolet’s answer to Ford’s Super Duty and Ram’s heavy-duty offerings, specifically targeting customers who required a robust truck for demanding tasks like towing large trailers, hauling heavy loads, and navigating challenging terrain. The Crew Cab configuration provided ample passenger space, making it suitable for both work crews and families.
Powertrain & Engine Architecture
At the heart of this Silverado 3500 HD variant lies the Duramax LML 6.6-liter turbocharged diesel V8 engine. This engine is a testament to diesel technology, featuring a cast iron block, aluminum cylinder heads, and a robust crankshaft. The LML generation of the Duramax introduced a revised combustion chamber design and a cooled exhaust gas recirculation (EGR) system to further reduce emissions. Fuel is delivered via a high-pressure common rail direct injection system, optimizing combustion efficiency and power output. The engine utilizes an overhead valve (OHV) valvetrain, known for its simplicity and durability. The turbocharger, coupled with an intercooler, forces more air into the engine, boosting power and torque. The Allison 6-speed automatic transmission is specifically designed to handle the immense torque produced by the Duramax engine. It features a lock-up torque converter for improved fuel efficiency and a heavy-duty cooling system to prevent overheating under strenuous conditions. The transmission’s gear ratios are optimized for both towing and everyday driving, providing a balance of power and efficiency.
Driving Characteristics
The Silverado 3500 HD with the 6.6L Duramax and Allison automatic delivers a driving experience characterized by substantial power and torque. The 397 horsepower and 765 lb-ft of torque are readily available, making it exceptionally capable for towing and hauling. While not a sports truck, the Duramax provides strong acceleration, especially when the transmission downshifts. The Allison automatic transmission shifts smoothly and decisively, providing a seamless power delivery. Compared to the gasoline-powered Silverado 3500 HD models, the diesel variant offers significantly more low-end torque, making it easier to pull heavy loads from a standstill. Compared to manual transmission equipped Duramax models, the automatic offers convenience and ease of use, particularly in stop-and-go traffic. However, some drivers may prefer the greater control offered by a manual transmission when towing in challenging conditions. The ride quality, while firm due to the heavy-duty suspension, is reasonably comfortable, especially in the Crew Cab configuration.
Equipment & Trim Levels
The Silverado 3500 HD II Crew Cab Standard Box with the Duramax engine typically came well-equipped, though specific features varied depending on the chosen trim level (Work Truck, LT, or LTX). Standard features generally included air conditioning, power windows and locks, a tilt steering wheel, and a basic audio system. Higher trim levels added features such as leather upholstery, heated front seats, a premium audio system, navigation, and a rearview camera. Optional extras included a sunroof, upgraded wheels, and various towing packages. The interior design was functional and durable, with a focus on providing a comfortable and practical work environment. The Crew Cab configuration offered generous rear seat legroom, making it suitable for carrying passengers on long trips.
Chassis & Braking
The Silverado 3500 HD’s chassis is built for durability and strength. It features a fully boxed frame constructed from high-strength steel. The front suspension utilizes an independent torsion bar setup with double wishbone control arms, providing a comfortable ride and good handling. The rear suspension employs a traditional leaf spring design, optimized for carrying heavy loads. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations. The steering system utilizes a recirculating ball mechanism, offering precise and responsive steering feel.
Market Reception & Comparison
The 2011-2014 Chevrolet Silverado 3500 HD with the Duramax diesel and Allison automatic received generally positive reviews from automotive critics. It was praised for its powerful engine, smooth transmission, and impressive towing and hauling capabilities. Fuel economy, while not exceptional, was considered reasonable for a heavy-duty truck of its size and capability. Compared to the gasoline-powered Silverado 3500 HD models, the Duramax diesel offered significantly better fuel economy when towing heavy loads. Reliability was generally good, although some owners reported issues with the emissions control system. The Silverado 3500 HD competed directly with the Ford Super Duty and Ram Heavy Duty trucks, and each offered its own strengths and weaknesses. The Silverado was often praised for its comfortable ride and spacious interior.
Legacy
The Duramax LML engine and Allison automatic transmission combination proved to be a durable and reliable powertrain. These trucks continue to be popular on the used car market, particularly among those seeking a capable and dependable heavy-duty pickup. With proper maintenance, these engines can easily exceed 200,000 miles. The 2011-2014 Silverado 3500 HD II represents a sweet spot in the Silverado lineage, offering a blend of modern features, proven reliability, and impressive capability. It remains a highly sought-after truck for those who need a workhorse that can handle demanding tasks without compromising comfort or convenience.
