The Chevrolet Silverado 2500 HD IV (T1XX) Double Cab Standard Bed, equipped with the 6.6-liter V8 engine producing 401 horsepower and paired with a 4WD automatic transmission, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2020 to 2023, this configuration occupied a sweet spot in the Silverado 2500 HD lineup, offering a balance of capability, comfort, and technology aimed at buyers needing serious towing and hauling capacity without the premium price tag of higher trim levels. It falls within the fourth generation (T1XX) of the Silverado HD series, known for its increased strength and refinement over its predecessors.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 2500 HD |
| Generation | Silverado 2500 HD IV (T1XX) Double Cab Standard Bed |
| Type (Engine) | 6.6 V8 (401 Hp) 4WD Automatic |
| Start of production | 2020 |
| End of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.6 kg/Hp, 131.5 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 206.2 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, VVT |
| Engine oil capacity | 7.6 l / 8.03 US qt | 6.69 UK qt |
| Coolant | 15.1 l / 15.96 US qt | 13.29 UK qt |
| Kerb Weight | 3050 kg / 6724.1 lbs. |
| Max. weight | 4695 kg / 10350.7 lbs. |
| Max load | 1645 kg / 3626.6 lbs. |
| Trunk (boot) space – maximum | 1968 l / 69.5 cu. ft. |
| Fuel tank capacity | 136 l / 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 6577 kg / 14499.8 lbs. |
| Length | 6107 mm / 240.43 in. |
| Width including mirrors | 2079 mm / 81.85 in. |
| Height | 2031 mm / 79.96 in. |
| Wheelbase | 3795 mm / 149.41 in. |
| Front track | 1731 mm / 68.15 in. |
| Rear (Back) track | 1736 mm / 68.35 in. |
| Ride height (ground clearance) | 257 mm / 10.12 in. |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| 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 | 265/70 R17; 245/75 R17; 275/70 R18; 275/65 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 20 |
INTRODUCTION
The 2020-2023 Chevrolet Silverado 2500 HD Double Cab Standard Bed with the 6.6L V8 and 4WD automatic transmission is a heavy-duty pickup truck designed for demanding tasks. This model year represents the beginning of the fourth generation (T1XX platform) Silverado HD trucks, which brought significant improvements in towing capacity, interior refinement, and technology. Positioned as a mid-range offering within the 2500 HD lineup, it catered to customers who needed substantial capability but didn’t require the luxury features of the High Country or the performance of the Duramax diesel options. The Double Cab configuration provides a useful blend of passenger space and bed length, making it suitable for both work and family use.
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD is Chevrolet’s 6.6-liter L8T V8 gasoline engine. This engine is a naturally aspirated, overhead valve (OHV) design featuring variable valve timing (VVT) for improved efficiency and performance. The L8T utilizes direct fuel injection, delivering fuel directly into the combustion chamber for precise control and increased power output. The engine produces 401 horsepower at 5200 rpm and 464 lb-ft of torque at 4000 rpm. The Hydra-Matic 6L90 six-speed automatic transmission is the sole transmission option for this configuration. This transmission is known for its durability and smooth shifting characteristics, and is specifically calibrated to handle the high torque output of the 6.6L V8. The transmission features electronically controlled shifting and tow/haul mode for optimized performance when towing heavy loads.
Driving Characteristics
The Silverado 2500 HD 6.6L V8 Automatic delivers a robust driving experience, prioritizing capability over outright speed. While not as quick as lighter-duty trucks or those equipped with the diesel engine, the 6.6L V8 provides ample power for everyday driving and demanding tasks. The six-speed automatic transmission is well-matched to the engine’s torque curve, providing smooth and predictable shifts. The gear ratios are optimized for towing and hauling, allowing the truck to maintain momentum even when carrying heavy loads. Compared to the diesel variants, the gasoline engine is noticeably quieter and offers a more linear power delivery. However, it lacks the diesel’s exceptional low-end torque and fuel efficiency. The 4WD system provides excellent traction in various conditions, making it suitable for both on-road and off-road use.
Equipment & Trim Levels
The Silverado 2500 HD Double Cab Standard Bed 6.6L V8 typically came standard with features such as air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. The Double Cab configuration offered comfortable seating for five passengers. Higher trim levels, such as the LT and LTZ, added features like leather upholstery, heated and ventilated front seats, a premium audio system, and advanced safety technologies. Optional extras included a trailer brake controller, a bed liner, and various appearance packages. The interior design was functional and durable, with a focus on providing a comfortable and practical work environment.
Chassis & Braking
The Silverado 2500 HD features a fully boxed frame constructed from high-strength steel, providing a solid foundation for its heavy-duty capabilities. The front suspension utilizes an independent torsion bar setup with double wishbone control arms, while the rear suspension employs a traditional leaf spring design. This combination provides a comfortable ride and excellent load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when towing heavy loads. An Anti-lock Braking System (ABS) is standard. The steering system is a hydraulic rack-and-pinion setup, offering precise and responsive steering feel.
Market Reception & Comparison
The Silverado 2500 HD 6.6L V8 Automatic was generally well-received by critics and consumers alike. It was praised for its strong towing capacity, comfortable ride, and user-friendly features. Compared to the diesel-powered Silverado 2500 HD, the gasoline version offered a lower initial cost but suffered from lower fuel economy and reduced towing capacity. However, it remained a popular choice for buyers who didn’t require the diesel’s extreme capabilities. Fuel economy was rated at around 15 mpg city and 19 mpg highway, which is typical for a heavy-duty gasoline pickup truck. Reliability was generally good, with few major issues reported.
Legacy
The Chevrolet Silverado 2500 HD IV (T1XX) Double Cab Standard Bed 6.6 V8 Automatic has proven to be a durable and reliable workhorse. On the used car market, these trucks hold their value relatively well, particularly those that have been well-maintained. The 6.6L V8 engine and Hydra-Matic transmission are known for their longevity, and parts availability is excellent. While the diesel variants are often preferred for heavy-duty towing, the gasoline version remains a viable option for buyers who need a capable and affordable pickup truck. The T1XX platform represented a significant step forward in terms of refinement and capability, solidifying the Silverado 2500 HD’s position as a leading contender in the heavy-duty truck segment.
