The Chevrolet Silverado 2500 HD IV, specifically the Double Cab Long Bed configuration with the 6.6-liter V8 engine producing 401 horsepower, represents Chevrolet’s entry into the heavy-duty truck segment for the 2024 model year (produced from 2023 onwards). This iteration falls within the fourth generation (T1XX platform) of the Silverado HD series, benefitting from a mid-cycle refresh that included styling updates and technological enhancements. Positioned as a robust work truck capable of significant towing and hauling, this variant caters to buyers needing substantial capability without necessarily opting for the highest trim levels or diesel powerplants.
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) 4WD 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 | 7.9 kg/Hp, 127.1 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 199.3 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 | 3156 kg (6957.79 lbs.) |
| Max. weight | 4763 kg (10500.62 lbs.) |
| Max load | 1607 kg (3542.83 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 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 | 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 |
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD variant lies the 6.6-liter L8T V8 gasoline engine. This engine is a naturally aspirated, overhead valve (OHV) design featuring direct fuel injection. The L8T produces 401 horsepower at 5200 rpm and 464 lb-ft of torque at 4000 rpm. The engine’s robust construction is geared towards durability and consistent power delivery, prioritizing longevity over outright performance. The engine utilizes a cast iron block and aluminum cylinder heads. The engine is mated to a heavy-duty 10-speed Allison automatic transmission, specifically designed to handle the substantial torque output and provide smooth, efficient shifting under heavy loads. This transmission features electronically controlled shifts and tow/haul mode for optimized performance when towing.
Driving Characteristics
The 6.6L V8 and 10-speed automatic combination delivers a capable, if not exhilarating, driving experience. While not as quick as lighter-duty trucks or those equipped with the optional Duramax diesel engine, the Silverado 2500 HD provides ample power for everyday driving and demanding tasks. The Allison transmission’s gear ratios are optimized for towing, providing strong low-end torque and minimizing gear hunting. The truck feels substantial and planted on the road, with the long wheelbase contributing to a comfortable ride, even when unladen. Compared to the diesel variants, this gasoline engine is noticeably quieter and smoother, but sacrifices fuel economy and ultimate towing capacity. The automatic transmission, while smooth, doesn’t offer the same level of driver engagement as a manual transmission, but it simplifies operation, especially in heavy traffic or when towing.
Equipment & Trim Levels
The Double Cab Long Bed 6.6L V8 4WD Silverado 2500 HD typically comes standard with features such as air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. Higher trim levels, such as LT and High Country, add features like leather upholstery, heated and ventilated seats, a premium sound system, and advanced safety technologies like lane departure warning and automatic emergency braking. Optional extras include a power sunroof, a navigation system, and a bed liner. The interior design is functional and durable, prioritizing practicality over luxury, although the facelifted 2024 models received upgraded interior materials and a more modern dashboard layout.
Chassis & Braking
The Silverado 2500 HD utilizes a fully boxed, high-strength steel frame for exceptional rigidity and durability. The front suspension consists of an independent torsion bar setup with double wishbones, while the rear suspension employs a traditional leaf spring design. This configuration is optimized for heavy-duty hauling and towing. Braking duties are handled by ventilated disc brakes on all four wheels, with the front discs measuring 355x40mm and the rear discs measuring 360x34mm. 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.
Market Reception & Comparison
Critics generally praised the Silverado 2500 HD’s robust construction, impressive towing capacity, and comfortable ride. However, the 6.6L V8 engine was often seen as a compromise compared to the more powerful and fuel-efficient Duramax diesel engine. Fuel economy, while adequate, is lower than that of comparable light-duty trucks. Compared to the diesel variants, the gasoline engine offers a lower initial purchase price and simpler maintenance requirements. The gasoline engine is a good choice for buyers who prioritize affordability and simplicity over maximum towing capacity and fuel efficiency.
Legacy
The 6.6L V8 engine in the Silverado 2500 HD has proven to be a reliable and durable powerplant. While not as sought-after as the Duramax diesel, it remains a popular choice for buyers who need a capable work truck without the added cost and complexity of a diesel engine. On the used car market, these trucks generally hold their value well, particularly those that have been well-maintained and have a documented service history. The Allison transmission is also known for its longevity and reliability, making this powertrain combination a solid choice for long-term ownership.
