The Chevrolet Silverado 2500 HD IV (T1XX) Double Cab Long 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 variant 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 the highest trims. It was part of 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 Long Bed |
| Type (Engine) | 6.6 V8 (401 Hp) 4WD 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 | 7.7 kg/Hp, 129.4 Hp/tonne |
| Weight-to-torque ratio | 4.9 kg/Nm, 203 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 | 3098 kg / 6829.92 lbs |
| Max. weight | 4763 kg / 10500.62 lbs |
| Max load | 1665 kg / 3670.7 lbs |
| Trunk (boot) space – maximum | 2364 l / 83.48 cu. ft |
| Fuel tank capacity | 136 l / 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 7552 kg / 16649.31 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 | 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 |
| Wheel rims size | 7.5J x 17; 8J x 18 |
INTRODUCTION
The 2020-2023 Chevrolet Silverado 2500 HD Double Cab Long Bed with the 6.6L V8 and 4WD automatic transmission was a mainstay of Chevrolet’s heavy-duty truck offerings. Built on the T1XX platform, this generation represented a significant step forward in terms of capability and refinement. Positioned as a mid-range offering, it catered to customers who required substantial towing and payload capacity for work or recreational purposes, but didn’t necessarily need the luxury features of the High Country or the performance of the Duramax diesel. The Double Cab configuration provided ample space for passengers, while the Long Bed offered increased cargo versatility.
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 descendant of the Vortec series, but incorporates modern technologies like direct injection and variable valve timing (VVT). The direct injection system, coupled with a 10.8:1 compression ratio, contributes to improved efficiency and power output. The overhead valve (OHV) valvetrain, while traditional, is known for its durability and relatively simple maintenance. The engine produces 401 horsepower at 5200 rpm and 629 lb-ft of torque at 4000 rpm.
The engine is mated to a six-speed Hydra-Matic automatic transmission. This transmission is designed to handle the high torque output of the V8 and provide smooth, reliable shifting. The automatic transmission features electronically controlled shifting and tow/haul mode, optimizing gear selection for towing and hauling heavy loads. The 4WD system is a traditional part-time system, allowing the driver to switch between two-wheel drive and four-wheel drive as needed.
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 Duramax diesel, the V8 provides ample power for everyday driving and demanding tasks. The automatic transmission shifts smoothly, and the tow/haul mode effectively manages gear selection when towing. The weight of the truck is noticeable, especially when unladen, but the suspension does a reasonable job of absorbing bumps and providing a comfortable ride. Compared to the diesel variants, the V8 is quieter and offers a more traditional truck feel. The gear ratios are optimized for towing, meaning acceleration from a standstill is adequate but not exhilarating.
Equipment & Trim Levels
The Silverado 2500 HD Double Cab Long Bed 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. The Double Cab configuration offered comfortable seating for five passengers. Optional extras included features like leather upholstery, heated and ventilated front seats, a premium audio system, navigation, and advanced safety technologies such as lane departure warning and automatic emergency braking. Trim levels above the base model added features like chrome exterior accents, upgraded interior materials, and additional convenience features.
Chassis & Braking
The Silverado 2500 HD features a robust chassis designed to withstand heavy loads and demanding conditions. The front suspension utilizes an independent torsion bar setup with double wishbones, providing a comfortable ride and good handling. The rear suspension employs a traditional leaf spring design, offering excellent load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The front brakes measure 355x40mm, while the rear brakes are 360x34mm. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations.
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 and hauling capabilities, comfortable ride, and user-friendly features. Compared to the diesel-powered Silverado 2500 HD, the V8 offered a lower initial cost and simpler maintenance. However, it lacked the diesel’s superior fuel economy and torque. Compared to other trucks in its class, such as the Ford Super Duty and Ram 2500, the Silverado 2500 HD offered a competitive combination of features, performance, and value. Fuel economy was typical for a heavy-duty truck, averaging around 15-17 mpg in combined driving.
Legacy
The L8T 6.6L V8 engine and the six-speed Hydra-Matic transmission have proven to be relatively reliable powertrains. While not immune to issues, they generally require routine maintenance and are known for their durability. In the used car market, the 2020-2023 Silverado 2500 HD 6.6L V8 Automatic remains a popular choice for buyers seeking a capable and affordable heavy-duty truck. Its balance of power, comfort, and features makes it a versatile option for a wide range of applications. Properly maintained examples continue to command reasonable prices and offer years of reliable service.
