The Chevrolet Silverado 3500 HD IV, specifically the Double Cab Long Bed configuration equipped with the 6.6-liter V8 engine producing 401 horsepower, represents the fourth generation of Chevrolet’s heavy-duty pickup truck line. Introduced for the 2024 model year as a refresh of the T1XX platform, this variant caters to buyers requiring substantial towing and payload capacity while maintaining everyday usability. Positioned as a mid-to-high range offering within the Silverado 3500 HD lineup, it serves as a bridge between work-focused base models and the more luxurious High Country trims.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD IV (T1XX, facelift 2024) Double Cab Long Bed |
| Type (Engine) | 6.6 V8 (401 Hp) 4WD SRW Automatic |
| Start of production | 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8 kg/Hp, 124.4 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 195.2 Nm/tonne |
| Power | 401 Hp @ 5200 rpm |
| Torque | 629 Nm @ 4000 rpm, 463.93 lb.-ft. @ 4000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | L8T |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103.25 mm (4.06 in) |
| Piston Stroke | 98 mm (3.86 in) |
| Compression ratio | 10.8:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 7.6 l (8.03 US qt | 6.69 UK qt) |
| Coolant | 14.6 l (15.43 US qt | 12.85 UK qt) |
| Kerb Weight | 3223 kg (7105.5 lbs) |
| Max. weight | 5261 kg (11598.52 lbs) |
| Max load | 2038 kg (4493.02 lbs) |
| Fuel tank capacity | 136 l (35.93 US gal | 29.92 UK gal) |
| Permitted trailer load with brakes (12%) | 7257 kg (15998.95 lbs) |
| Length | 6514 mm (256.46 in) |
| Width including mirrors | 2079 mm (81.85 in) |
| Height | 2054 mm (80.87 in) |
| Wheelbase | 4127 mm (162.48 in) |
| Front track | 1731 mm (68.15 in) |
| Rear (Back) track | 1736 mm (68.35 in) |
| Ride height (ground clearance) | 284 mm (11.18 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, 360×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 275/70 R18; 275/65 R20 |
| Wheel rims size | 8J x 18; 8.5J x 20 |
Powertrain & Engine Architecture
The Chevrolet L8T 6.6-liter V8 gasoline engine powers this Silverado 3500 HD variant. This engine is a naturally aspirated, overhead valve (OHV) design, celebrated for its robust construction and relatively straightforward maintenance. Direct fuel injection optimizes combustion efficiency and power output, resulting in 401 horsepower at 5200 rpm and 629 Nm (463.93 lb-ft) of torque at 4000 rpm. The engine’s durability is a key attribute, engineered to withstand the demands of heavy towing and hauling. The engine is paired with the Allison 10-speed automatic transmission, a heavy-duty unit specifically designed for large trucks. This transmission provides smooth shifting and optimized gear ratios for both towing and fuel economy. Electronically controlled operation allows for precise shift points based on load and driving conditions.
Driving Characteristics
The combination of the 401 hp V8 and the 10-speed Allison transmission delivers a capable, though not overtly sporty, driving experience. The truck excels in situations requiring substantial torque, such as accelerating with a heavy load or climbing steep grades. The 10-speed transmission helps maintain the engine within its optimal power band, providing responsive acceleration. Compared to the available Duramax diesel engine options, this gasoline V8 offers quicker acceleration at lower speeds but lacks the diesel’s superior low-end torque and fuel efficiency when towing at highway speeds. The automatic transmission is well-suited for both on-road and off-road driving, providing smooth and predictable shifts. However, drivers accustomed to manual transmissions may find the automatic’s shift logic somewhat conservative.
Equipment & Trim Levels
The Double Cab Long Bed 6.6 V8 4WD configuration typically includes a comprehensive list of standard features. These generally encompass air conditioning, power windows and locks, a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, and a rearview camera. Interior upholstery is typically cloth or vinyl, with optional leather upgrades available. Common optional extras include a premium audio system, heated and ventilated front seats, a power-adjustable steering column, and advanced safety features such as blind-spot monitoring and rear cross-traffic alert. The Double Cab configuration comfortably seats five passengers, while the Long Bed provides ample cargo space for both work and recreational needs.
Chassis & Braking
The Silverado 3500 HD utilizes a fully boxed frame for enhanced rigidity and durability. The front suspension features an independent torsion bar setup with double wishbones, providing a comfortable ride and stable handling. The rear suspension employs a traditional leaf spring design, optimized for heavy load carrying capacity. Braking is handled by ventilated disc brakes on all four wheels, with the front discs measuring 355×40 mm and the rear discs measuring 360×34 mm. An Anti-lock Braking System (ABS) is standard. Steering is accomplished via a hydraulic power steering system with a cone worm and recirculation balls mechanism. The truck’s robust chassis and braking system are designed to handle the significant weight and loads associated with heavy-duty truck applications.
Market Reception & Comparison
Critics generally praised the Silverado 3500 HD IV for its powerful engine, capable towing capacity, and comfortable ride. The 6.6-liter V8 was viewed as a viable alternative to the diesel options for buyers prioritizing initial cost and simpler maintenance. However, fuel economy was a frequent criticism, as the gasoline engine typically delivers lower MPG figures compared to the Duramax diesel. Compared to competitors like the Ford Super Duty and Ram Heavy Duty, the Silverado 3500 HD offered a competitive combination of features, performance, and price. The gasoline V8 variant often appealed to buyers who primarily use the truck for personal use or light-duty commercial applications, while the diesel options were favored by those who frequently tow heavy loads over long distances.
Legacy
The L8T 6.6-liter V8 engine and Allison 10-speed automatic transmission have proven to be a reliable powertrain combination in the Silverado 3500 HD. While not as fuel-efficient as the diesel alternatives, the gasoline engine’s simplicity and lower maintenance costs make it an attractive option for many buyers. On the used car market, these trucks generally maintain their value well, particularly those with documented service histories. The Silverado 3500 HD IV remains a popular choice for those seeking a capable and durable heavy-duty pickup truck.
