The Chevrolet Silverado 2500 HD IV, specifically the Double Cab Long Bed configuration with the 6.6-liter V8 engine producing 401 horsepower, represents the fourth generation of Chevrolet’s heavy-duty pickup truck line. Introduced with the 2024 model year as a facelift to the T1XX platform, this variant caters to buyers needing substantial towing and hauling capacity without sacrificing everyday usability. It occupies a mid-to-upper position within the 2500 HD lineup, offering a balance between capability and features compared to the base work truck trims and the more luxurious High Country models.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 2500 HD |
| Generation | Silverado 2500 HD IV (T1XX, facelift 2024) Double Cab Long Bed |
| Type (Engine) | 6.6 V8 (401 Hp) Automatic |
| Start of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.5 kg/Hp, 132.9 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 208.4 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 | 3018 kg (6653.55 lbs) |
| Max. weight | 4627 kg (10200.79 lbs) |
| Max load | 1609 kg (3547.24 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 | 2027 mm (79.8 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) | 258 mm (10.16 in) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 | 245/75 R17; 265/70 R17; 275/70 R18; 275/65 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 20 |
INTRODUCTION
The 2024 Chevrolet Silverado 2500 HD IV with the 6.6L V8 and automatic transmission is a heavy-duty pickup truck designed for demanding tasks. Built on the T1XX platform, this iteration represents a significant refresh of the Silverado HD line, focusing on enhanced capability, technology, and interior refinement. The Double Cab Long Bed configuration provides a versatile combination of passenger space and cargo capacity, making it suitable for both work and family use. This particular variant is positioned as a strong contender in the 3/4-ton pickup segment, competing with offerings from Ford and Ram.
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD is the Chevrolet L8T 6.6-liter naturally aspirated V8 engine. This engine utilizes direct fuel injection and a traditional overhead valve (OHV) valvetrain. The direct injection system allows for precise fuel delivery, optimizing combustion efficiency and power output. The OHV configuration, while less complex than overhead cam designs, contributes to the engine’s durability and low-end torque. The engine produces 401 horsepower at 5200 rpm and 629 lb-ft of torque at 4000 rpm. This power is channeled through a robust 10-speed Allison automatic transmission, known for its smooth shifting and durability. The Allison transmission is specifically calibrated for heavy-duty applications, providing optimal gear ratios for towing and hauling. The engine’s longitudinal mounting and rear-wheel-drive configuration are standard for this class of truck.
Driving Characteristics
The Silverado 2500 HD 6.6L V8 Automatic delivers a driving experience focused on capability and stability. While not as quick as lighter-duty pickups, the engine provides ample torque for accelerating with a load or tackling steep grades. The 10-speed Allison transmission effectively manages the engine’s power, keeping it within its optimal operating range. Compared to a diesel-powered Silverado 2500 HD, this gasoline variant offers quicker acceleration at lower weights, but lacks the diesel’s superior low-end torque and fuel efficiency when heavily loaded. The gear ratios are tuned for maximizing towing capacity, resulting in a comfortable cruising speed on the highway. The ride quality, while firm due to the heavy-duty suspension, is reasonably compliant for a truck of this size.
Equipment & Trim Levels
The Double Cab Long Bed 6.6L V8 Automatic Silverado 2500 HD typically comes standard with features such as a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, a rearview camera, and basic safety features like ABS. Higher trim levels add features like leather upholstery, heated and ventilated front seats, a premium sound system, and advanced driver-assistance systems such as adaptive cruise control and lane departure warning. Optional extras include a power sunroof, a spray-in bedliner, and various towing packages. Interior materials are generally durable and functional, with a focus on practicality rather than luxury in the lower trims.
Chassis & Braking
The Silverado 2500 HD utilizes a body-on-frame construction, providing a robust foundation for heavy-duty applications. The front suspension features an independent torsion bar setup with double wishbones, while the rear suspension employs a traditional leaf spring design. This configuration prioritizes load-carrying capacity and stability. Braking duties are handled by ventilated disc brakes on all four wheels, with larger rotors at the rear (360×34 mm) compared to the front (355×40 mm). An Anti-lock Braking System (ABS) is standard. The steering system utilizes a hydraulic power steering setup with a cone worm and recirculation balls, providing a direct and responsive feel.
Market Reception & Comparison
The 2024 Silverado 2500 HD with the 6.6L V8 received generally positive reviews, with critics praising its increased towing capacity and improved interior. However, some reviewers noted that the gasoline engine’s fuel economy lags behind that of the diesel options. Compared to the Duramax diesel engine offered in the Silverado 2500 HD, the 6.6L V8 provides a lower initial cost but sacrifices fuel efficiency and ultimate towing capacity. Against competitors like the Ford Super Duty and Ram 2500, the Silverado 2500 HD offers a competitive combination of features, capability, and price.
Legacy
The L8T 6.6L V8 engine has proven to be a reliable and durable powerplant in the Silverado HD lineup. While not as fuel-efficient as newer engine technologies, its simplicity and robust construction contribute to its longevity. In the used car market, Silverado 2500 HD models equipped with this engine and the Allison transmission are generally well-regarded for their dependability and towing capabilities. Proper maintenance, including regular oil changes and fluid checks, is crucial for ensuring the long-term reliability of this powertrain. The 2024 facelifted model represents a refinement of this proven formula, offering a compelling option for buyers seeking a capable and dependable heavy-duty pickup truck.
