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 6-speed 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 value for buyers needing serious towing and hauling capacity without opting for the highest trim levels. It falls within the fourth generation (T1XX) of the Silverado HD series, known for its enhanced strength and technology compared to 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) Automatic |
| Start of production | 2020 year |
| End of production | 2023 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.3 kg/Hp, 137.7 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 215.9 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 | 2913 kg, 6422.07 lbs. |
| Max. weight | 4559 kg, 10050.87 lbs. |
| Max load | 1646 kg, 3628.81 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 | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 |
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD variant lies the Chevrolet L8T 6.6-liter naturally aspirated V8 engine. This engine is a member of the Vortec family, known for its robust construction and reliable performance. The L8T features direct fuel injection, enhancing efficiency and power delivery. The overhead valve (OHV) valvetrain, coupled with variable valve timing (VVT), optimizes engine performance across a wider RPM range. The engine produces 401 horsepower at 5200 rpm and 629 lb-ft of torque at 4000 rpm, making it well-suited for demanding tasks. The Hydra-Matic 6-speed automatic transmission is the standard pairing, providing smooth shifts and adequate gear ratios for both towing and everyday driving. This transmission is known for its durability and ability to handle the high torque output of the V8 engine.
Driving Characteristics
The 6.6L V8 and 6-speed automatic combination delivers a confident driving experience. While not as quick as some of the diesel-powered Silverado 2500 HD models, the gasoline engine provides ample power for most hauling and towing needs. The automatic transmission is tuned for practicality, prioritizing smooth shifts and ease of use over outright performance. The gear ratios are well-matched to the engine’s torque curve, providing strong acceleration from a standstill and sufficient power for highway passing. Compared to the manual transmission option, the automatic offers greater convenience, especially in stop-and-go traffic or when navigating challenging terrain. However, the manual transmission provides more driver control and potentially slightly better fuel economy.
Equipment & Trim Levels
The 2500 HD Double Cab Standard Bed with the 6.6L V8 typically came standard with features like air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. Higher trim levels, such as the LT and High Country, added features like leather upholstery, heated and ventilated seats, a premium sound system, and advanced safety technologies. Optional extras included a sunroof, navigation system, and various towing packages. The Double Cab configuration offered a spacious interior with seating for five passengers, making it a practical choice for families or crews.
Chassis & Braking
The Silverado 2500 HD IV (T1XX) utilizes a fully boxed frame for enhanced strength and rigidity. The front suspension features an independent torsion bar setup with double wishbones, providing a comfortable ride and good handling characteristics. The rear suspension employs a traditional leaf spring design, optimized for load-carrying capacity. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power even when towing heavy loads. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations. Steering is hydraulic, offering a responsive and predictable feel.
Market Reception & Comparison
Critics generally praised the Silverado 2500 HD IV (T1XX) for its robust construction, powerful engine options, and comfortable ride. The 6.6L V8/automatic combination was viewed as a solid all-around performer, offering a good balance of power, efficiency, and convenience. Compared to the diesel-powered variants, the gasoline engine was considered more affordable but less fuel-efficient and offered lower towing capacity. However, the gasoline engine was often preferred by buyers who did not require the extreme towing capabilities of the diesel models. Fuel economy was rated at around 15 mpg city and 19 mpg highway, which is typical for a heavy-duty truck of this size.
Legacy
The L8T 6.6L V8 engine and Hydra-Matic transmission pairing has proven to be a reliable and durable powertrain combination. While not without its minor issues (such as occasional oil leaks or sensor failures), the powertrain is generally well-regarded for its longevity and relatively low maintenance costs. In the used car market, these Silverado 2500 HD models remain popular choices for buyers seeking a capable and dependable heavy-duty truck. Their affordability and proven track record make them a compelling alternative to newer, more expensive models. The T1XX platform itself is considered a significant improvement over previous generations, offering enhanced strength, safety, and technology.
