The Chevrolet Silverado 3500 HD IV (T1XX) Double Cab Long Bed, equipped with the 6.6-liter V8 engine producing 401 horsepower and paired with an automatic transmission, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2020 through 2023, this variant occupied a key position within the fourth generation (T1XX) Silverado HD lineup, catering to buyers requiring substantial towing and hauling capabilities in a comfortable, well-equipped package. This configuration, often specified with the Dual Rear Wheel (DRW) setup, was aimed at professionals and enthusiasts needing maximum payload and trailer capacity.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD IV (T1XX) Double Cab Long Bed |
| Type (Engine) | 6.6 V8 (401 Hp) DRW 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 | 7.9 kg/Hp, 126.7 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 198.7 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 | 3165 kg (6977.63 lbs.) |
| Max. weight | 6350 kg (13999.35 lbs.) |
| Max load | 3185 kg (7021.72 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%) | 7439 kg (16400.19 lbs.) |
| Length | 6514 mm (256.46 in.) |
| Width including mirrors | 2457 mm (96.73 in.) |
| Height | 2037 mm (80.2 in.) |
| Wheelbase | 4127 mm (162.48 in.) |
| Front track | 1731 mm (68.15 in.) |
| Rear (Back) track | 1905 mm (75 in.) |
| Ride height (ground clearance) | 264 mm (10.39 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, 355×40 mm |
INTRODUCTION
The 2020-2023 Chevrolet Silverado 3500 HD IV, specifically the Double Cab Long Bed configuration with the 6.6L V8 and automatic transmission, represented a substantial upgrade over previous generations. Built on the T1XX platform, this truck was designed to offer increased strength, capability, and refinement. The “HD” designation signifies Heavy Duty, indicating its focus on demanding tasks like towing large trailers, hauling heavy payloads, and providing a robust work platform. The DRW (Dual Rear Wheel) configuration further enhanced these capabilities, making it a popular choice for commercial applications and serious towing enthusiasts. This variant sat in the middle to upper range of the Silverado 3500 HD lineup, offering a balance between capability and everyday usability.
Powertrain & Engine Architecture
At the heart of this Silverado 3500 HD lies the Chevrolet L8T 6.6-liter V8 engine. This is a naturally aspirated, gasoline engine featuring direct injection and a cast iron block with aluminum cylinder heads. The engine produces 401 horsepower at 5200 rpm and 464 lb-ft of torque at 4000 rpm. The direct injection system optimizes fuel delivery for improved efficiency and power output. The overhead valve (OHV) valvetrain, coupled with Variable Valve Timing (VVT), contributes to a broad torque curve. The engine is mated to a six-speed Hydra-Matic automatic transmission, known for its durability and smooth shifting. This transmission is specifically calibrated for heavy-duty applications, with reinforced components to handle the high torque output of the V8 engine. The transmission’s gear ratios are optimized for both towing and everyday driving, providing adequate power across a wide range of speeds.
Driving Characteristics
The Silverado 3500 HD IV with the 6.6L V8 and automatic transmission delivers a driving experience focused on capability and stability. While not as quick as lighter-duty trucks or those equipped with the optional Duramax diesel engine, the V8 provides ample power for most tasks. The automatic transmission shifts smoothly and predictably, making it easy to operate in various driving conditions. The DRW configuration significantly enhances stability when towing heavy loads, reducing sway and improving overall control. However, the added weight and complexity of the DRW setup can make the truck feel less nimble in everyday driving situations. The suspension is tuned to prioritize load-carrying capacity over ride comfort, resulting in a firmer ride, especially when the truck is unloaded.
Equipment & Trim Levels
The Silverado 3500 HD IV Double Cab Long Bed 6.6L V8 typically came standard with a comprehensive suite of features. These included 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, added features like leather upholstery, heated and ventilated front seats, a premium audio system, and advanced safety technologies like lane departure warning and automatic emergency braking. Optional extras included a power sunroof, a navigation system, and a variety of towing packages designed to enhance the truck’s capabilities. Interior materials varied depending on the trim level, with base models featuring durable cloth upholstery and higher trims offering more luxurious leather options.
Chassis & Braking
The Silverado 3500 HD IV features a robust chassis designed to withstand the stresses of heavy-duty use. The front suspension utilizes an independent torsion bar setup with double wishbone components, 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 disc brakes on all four wheels, providing ample stopping power even when the truck is heavily loaded. The anti-lock braking system (ABS) helps to maintain control during emergency braking situations. Steering is accomplished via a hydraulic power steering system, offering a responsive and precise feel.
Market Reception & Comparison
The Silverado 3500 HD IV with the 6.6L V8 and automatic transmission received generally positive reviews from automotive critics. While the diesel engine was often praised for its fuel efficiency and towing prowess, the V8 was recognized as a capable and reliable option for those who didn’t require the ultimate in towing performance. Fuel economy was considered average for a heavy-duty truck, and reliability was generally good. Compared to the Duramax diesel variant, the V8 offered a lower initial cost but higher fuel consumption. Compared to competitors like the Ford Super Duty and Ram Heavy Duty, the Silverado 3500 HD was often praised for its spacious interior and comfortable ride.
Legacy
The L8T 6.6L V8 engine and the six-speed Hydra-Matic transmission have proven to be durable and reliable powertrains. In the used car market, the 2020-2023 Silverado 3500 HD IV with this configuration remains a popular choice for buyers seeking a capable and affordable heavy-duty truck. Maintenance costs are generally reasonable, and parts availability is good. While the diesel engine remains the preferred choice for serious towing applications, the V8-powered Silverado 3500 HD continues to offer a compelling combination of power, capability, and value.
