The Chevrolet Silverado 3500 HD IV, specifically the Crew Cab Long Bed configuration with the 6.6-liter Duramax Turbo Diesel V8 engine producing 470 horsepower, represents the pinnacle of capability within the fourth generation (T1XX) Silverado HD lineup, introduced with a significant facelift in 2024. This variant is positioned as a heavy-duty work truck and towing specialist, catering to owners with substantial hauling and payload requirements. It builds upon the established Silverado HD legacy, offering increased refinement and technology while maintaining its core strength. Production began in late 2023 for the 2024 model year.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD IV (T1XX, facelift 2024) Crew 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 | 8 kg/Hp, 125.7 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 353.5 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 | 3740 kg (8245.29 lbs.) |
| Max. weight | 6350 kg (13999.35 lbs.) |
| Max load | 2610 kg (5754.07 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 | 6759 mm (266.1 in.) |
| Width including mirrors | 2457 mm (96.73 in.) |
| Height | 2049 mm (80.67 in.) |
| Wheelbase | 4369 mm (172.01 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 | 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 | 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 | 6.5J x 17; 8J x 18 |
INTRODUCTION
The 2024 Chevrolet Silverado 3500 HD IV Crew Cab Long Bed with the 6.6L Duramax diesel and Allison automatic transmission is a heavy-duty pickup truck designed for demanding tasks. It represents a significant update to the Silverado HD line, focusing on increased capability, improved interior refinement, and enhanced technology. This particular configuration, with its dual-rear-wheel (DRW) setup, is geared towards owners who regularly tow extremely heavy loads, such as large trailers, construction equipment, or livestock. The “IV” designation signifies the fourth generation of the Silverado HD series, built on the T1XX platform. The 2024 facelift brought revised styling, a more modern interior, and updated technology features.
Powertrain & Engine Architecture
At the heart of this Silverado 3500 HD is the L5P 6.6-liter Duramax turbocharged diesel V8 engine. This engine is a cornerstone of GM’s heavy-duty truck strategy, known for its robust construction and impressive torque output. The L5P utilizes a cast iron block, aluminum cylinder heads, and a forged steel crankshaft. It employs a diesel commonrail fuel injection system, delivering fuel at extremely high pressures for efficient combustion. The engine features an overhead valve (OHV) valvetrain, a design choice prioritizing durability and low-end torque. A variable geometry turbocharger and intercooler maximize power and efficiency. The engine produces 470 horsepower at 2800 rpm and a massive 1322 Nm (975.06 lb-ft) of torque at 1600 rpm. This torque is crucial for heavy towing and hauling. Paired with the engine is the Allison 10-speed automatic transmission, a heavy-duty unit specifically designed to handle the engine’s substantial output. The Allison transmission features electronically controlled shifts and a lock-up torque converter for improved fuel economy and responsiveness.
Driving Characteristics
The Silverado 3500 HD 6.6L Duramax with the Allison 10-speed delivers a driving experience focused on capability rather than outright speed. The 10-speed transmission helps to keep the engine in its optimal power band, providing strong acceleration even when heavily loaded. The gear ratios are optimized for towing, allowing the truck to maintain speed on inclines without excessive downshifting. While not a sports truck, the Duramax provides ample power for merging onto highways and passing other vehicles. The ride quality, even unladen, is relatively comfortable for a heavy-duty pickup, thanks to the refined suspension tuning. However, the truck’s substantial weight is always noticeable. Compared to gasoline-powered Silverado 3500 HD models, the Duramax offers significantly more torque at lower RPMs, making it ideal for towing. Compared to other Duramax configurations (like those with different axle ratios), this setup prioritizes towing capacity over fuel economy.
Equipment & Trim Levels
The Crew Cab Long Bed configuration offers a spacious interior with seating for five passengers. Standard features typically include a user-friendly infotainment system with a large touchscreen display, Apple CarPlay and Android Auto compatibility, and a suite of advanced safety features such as automatic emergency braking and lane departure warning. Interior upholstery is typically cloth or vinyl, with leather options available as upgrades. The 2024 facelift brought a redesigned dashboard and improved materials. Optional extras include a premium audio system, heated and ventilated front seats, a power-adjustable steering column, and a rear-seat entertainment system. The Silverado 3500 HD offers various trim levels, with this Duramax/Allison combination available on higher trims like LT, LTZ, and High Country, each adding increasing levels of luxury and technology.
Chassis & Braking
The Silverado 3500 HD features a robust chassis designed to withstand heavy loads. The front suspension utilizes an independent torsion bar and double wishbone setup, while the rear suspension employs a traditional leaf spring configuration. The DRW configuration provides increased stability and load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, measuring 355×40 mm. An Anti-lock Braking System (ABS) is standard. The steering system is a hydraulic power steering setup with a cone worm and recirculation balls mechanism. The truck’s substantial weight necessitates a robust braking system to ensure safe and controlled stopping power, even when towing.
Market Reception & Comparison
The Silverado 3500 HD with the Duramax diesel has consistently been a popular choice among heavy-duty truck buyers. Critics praise its powerful engine, capable towing capacity, and comfortable ride. Compared to the gasoline-powered Silverado 3500 HD models, the Duramax offers superior fuel economy when towing heavy loads, despite its higher initial cost. Compared to competitors like the Ford Super Duty and Ram 3500, the Silverado 3500 HD is often seen as offering a good balance of capability, comfort, and value. However, some critics have noted that the interior design, prior to the 2024 facelift, lagged behind some of its competitors in terms of refinement.
Legacy
The L5P Duramax engine has proven to be a remarkably reliable powertrain, with many examples exceeding 200,000 miles with proper maintenance. The Allison 10-speed automatic transmission is also known for its durability. In the used car market, Silverado 3500 HD models equipped with the Duramax diesel command a premium price due to their proven capability and longevity. These trucks remain highly sought after by owners who require a dependable and powerful workhorse for demanding tasks. The 2024 facelift is expected to further enhance the Silverado 3500 HD’s reputation for reliability and capability, solidifying its position as a leading contender in the heavy-duty truck segment.
