The Chevrolet Silverado 3500 HD IV, specifically the 2024 model year Double Cab Long Bed configuration equipped with the 6.6-liter Duramax Turbo Diesel V8 engine producing 470 horsepower and paired with a 10-speed Allison automatic transmission and four-wheel drive, represents the pinnacle of capability within Chevrolet’s heavy-duty truck lineup. Introduced as part of the T1XX platform’s mid-cycle refresh in 2024, this variant caters to buyers requiring substantial towing and payload capacity without sacrificing a degree of everyday usability. It occupies the upper echelon of the Silverado 3500 HD range, positioned above trims with gasoline engines and lower output diesel options.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD IV (T1XX, facelift 2024) Double Cab Long Bed |
| Type (Engine) | 6.6 Duramax TD V8 (470 Hp) 4WD DRW Automatic |
| Start of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 7.9 kg/Hp, 127.1 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 357.4 Nm/tonne |
| Power | 470 Hp @ 2800 rpm |
| Power per litre | 71.2 Hp/l |
| Torque | 1322 Nm @ 1600 rpm (975.06 lb.-ft. @ 1600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L5P |
| Engine displacement | 6604 cm3 (403 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 | 28.5 l (30.12 US qt | 25.08 UK qt) |
| Kerb Weight | 3699 kg (8154.9 lbs.) |
| Max. weight | 6350 kg (13999.35 lbs.) |
| Max load | 2651 kg (5844.45 lbs.) |
| Fuel tank capacity | 136 l (35.93 US gal | 29.92 UK gal) |
| Permitted trailer load with brakes (12%) | 9072 kg (20000.34 lbs.) |
| Length | 6514 mm (256.46 in.) |
| Width including mirrors | 2457 mm (96.73 in.) |
| Height | 2037 mm (80.2 in.) |
| Wheelbase | 4127 mm (162.48 in.) |
| Front track | 1731 mm (68.15 in.) |
| Rear (Back) track | 1905 mm (75 in.) |
| Ride height (ground clearance) | 264 mm (10.39 in.) |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| Number of gears and type of gearbox | 10 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, 355×40 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 235/80 R17; 235/80 R18 |
| Wheel rims size | 6.4J x 17 |
Introduction
The 2024 Chevrolet Silverado 3500 HD Double Cab Long Bed with the 6.6L Duramax diesel represents a significant evolution of Chevrolet’s heavy-duty truck offerings. Built on the T1XX platform, this iteration benefits from a comprehensive facelift, incorporating updated styling, enhanced technology, and refined interior appointments. This particular configuration is geared towards owners who demand substantial towing and hauling capabilities, but also appreciate the comfort and space of a double cab and the versatility of a long bed. It’s a workhorse designed for demanding tasks, from commercial applications to recreational pursuits like fifth-wheel RV towing.
Powertrain & Engine Architecture
At the heart of this Silverado 3500 HD lies the L5P 6.6-liter Duramax turbocharged diesel V8 engine. This engine is a cornerstone of Chevrolet’s heavy-duty lineup, renowned for its durability and prodigious torque output. The L5P utilizes a cast iron block, aluminum cylinder heads, and a robust rotating assembly designed to withstand the stresses of heavy-duty operation. It employs a high-pressure common rail direct fuel injection system, delivering fuel directly into the cylinders at extremely high pressures for optimized combustion. The engine features an overhead valve (OHV) valvetrain, a design choice favored for its simplicity and reliability. A variable geometry turbocharger, coupled with an intercooler, provides enhanced boost and efficiency. The 10-speed Allison automatic transmission is specifically calibrated to handle the engine’s substantial torque, offering smooth and precise gear changes. This transmission features electronically controlled shifts and a tow/haul mode optimized for maximizing towing performance.
Driving Characteristics
The combination of the 470 horsepower and 1322 lb-ft of torque delivered by the Duramax engine and managed by the 10-speed Allison transmission results in a driving experience that prioritizes effortless power and control. Acceleration, while not sporty, is remarkably strong even with a substantial load. The 10-speed transmission keeps the engine within its optimal power band, providing ample torque for towing and hauling. The gear ratios are carefully chosen to balance responsiveness with fuel efficiency. Compared to the gasoline-powered Silverado 3500 HD models, the Duramax diesel offers significantly more low-end torque, making it ideal for challenging towing scenarios. While the manual transmission options (available on lower trims) offer a more direct connection to the engine, the Allison automatic provides a level of convenience and ease of use that is particularly appealing for long-distance towing.
Equipment & Trim Levels
The Double Cab Long Bed 6.6L Duramax configuration is typically offered in higher trim levels, such as LT, LTZ, and High Country. Standard features generally include a comprehensive suite of safety technologies, such as automatic emergency braking and lane departure warning. Interior appointments typically include comfortable cloth or leather upholstery, a user-friendly infotainment system with a large touchscreen display, and a premium sound system. Optional extras can include features like a power sunroof, heated and ventilated front seats, a rear-seat entertainment system, and advanced trailering technologies like a bed view camera and trailer tire pressure monitoring. The High Country trim, in particular, offers a luxurious interior with premium materials and exclusive features.
Chassis & Braking
The Silverado 3500 HD features a fully boxed frame constructed from high-strength steel, providing a solid foundation for heavy-duty operation. The front suspension utilizes an independent torsion bar and double wishbone design, offering a comfortable ride and precise handling. The rear suspension employs a traditional leaf spring setup, optimized for load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when towing a heavy load. An Anti-lock Braking System (ABS) is standard. The steering system utilizes a hydraulic power steering setup, offering a responsive and predictable feel.
Market Reception & Comparison
The 2024 Silverado 3500 HD with the Duramax diesel engine has been generally well-received by automotive critics and consumers alike. Reviewers praise its powerful engine, smooth transmission, and comfortable ride. Fuel economy, while not exceptional, is competitive within the heavy-duty truck segment. Compared to the Ford Super Duty and Ram 3500, the Silverado 3500 HD offers a compelling combination of capability, comfort, and value. The Duramax engine is often cited as a key advantage, offering a balance of power, efficiency, and reliability. However, some critics have noted that the interior design, while improved with the 2024 refresh, still lags behind some of its competitors in terms of overall refinement.
Legacy
The Duramax diesel engine has established a strong reputation for long-term reliability and durability. Properly maintained, these engines can easily exceed 200,000 miles. The L5P variant, in particular, has proven to be a robust and dependable powerplant. On the used car market, Silverado 3500 HD models equipped with the Duramax diesel engine command a premium price due to their proven capabilities and longevity. The 10-speed Allison transmission has also proven to be a reliable and capable unit, further enhancing the long-term value of these trucks.
