The Chevrolet Silverado 3500 HD IV (T1XX) Crew Cab Standard Bed, equipped with the 6.6-liter V8 engine producing 401 horsepower and paired with a six-speed automatic transmission, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2020 through 2023, this variant occupied a central position within the fourth generation (T1XX) Silverado HD lineup, catering to buyers requiring substantial towing and payload capacity without opting for the diesel engine offerings. It was designed to balance capability with a more accessible price point compared to the Duramax diesel models.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD IV (T1XX) Crew Cab Standard Bed |
| Type (Engine) | 6.6 V8 (401 Hp) SRW 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 | 7.5 kg/Hp, 133 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 208.6 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 | 3015 kg / 6646.94 lbs. |
| Max. weight | 4990 kg / 11001.07 lbs. |
| Max load | 1975 kg / 4354.13 lbs. |
| Trunk (boot) space – maximum | 1970 l / 69.57 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 | 6349 mm / 249.96 in. |
| Width including mirrors | 2079 mm / 81.85 in. |
| Height | 2054 mm / 80.87 in. |
| Wheelbase | 4037 mm / 158.94 in. |
| Front track | 1731 mm / 68.15 in. |
| Rear (Back) track | 1736 mm / 68.35 in. |
| Ride height (ground clearance) | 284 mm / 11.18 in. |
| Drivetrain Architecture | Rear wheel drive. Internal Combustion engine. |
| 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 |
Powertrain & Engine Architecture
The heart of this Silverado 3500 HD variant is the 6.6-liter L8T V8 engine. This engine is a naturally aspirated, gasoline-powered unit featuring direct injection and a cast iron block with aluminum cylinder heads. The L8T utilizes a single overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance and efficiency. The direct injection system allows for precise fuel delivery, contributing to improved combustion and power output. The engine produces 401 horsepower at 5200 rpm and 464 lb-ft of torque at 4000 rpm, providing ample power for hauling and towing. The engine is mated to a six-speed Hydra-Matic automatic transmission, known for its durability and smooth shifting characteristics. This transmission is specifically calibrated for heavy-duty applications, featuring reinforced components to handle the high torque output of the V8 engine.
Driving Characteristics
The 6.6L V8 with the six-speed automatic delivers a driving experience focused on usability and capability rather than outright speed. Acceleration is adequate for everyday driving and highway merging, but it doesn’t offer the briskness of the diesel options. The automatic transmission is well-tuned for towing, holding gears effectively when climbing hills or carrying heavy loads. The gear ratios are optimized for maximizing torque at lower engine speeds, which is crucial for hauling. Compared to the 6.6L Duramax diesel, this gasoline variant provides a quieter and smoother ride, but sacrifices fuel economy and ultimate towing capacity. The gasoline engine also lacks the low-end grunt of the diesel, requiring more frequent downshifts when heavily loaded.
Equipment & Trim Levels
The Silverado 3500 HD IV Crew 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 front seats, a premium sound system, and advanced safety technologies like lane departure warning and automatic emergency braking. Optional extras included a power sunroof, a navigation system, and a trailering package with integrated trailer brake controller.
Chassis & Braking
The Silverado 3500 HD features a robust chassis designed to withstand heavy loads. 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, optimized for 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
Critics generally praised the Silverado 3500 HD’s overall capability and comfortable ride. The 6.6L V8 was seen as a viable option for buyers who didn’t require the extreme towing capacity of the diesel engine, offering a more affordable entry point into the heavy-duty truck segment. Fuel economy, however, was a common criticism, as the gasoline engine consumed significantly more fuel than the Duramax diesel. Compared to the diesel variants, the 6.6L V8 offered a lower initial purchase price and simpler maintenance requirements, but at the cost of reduced fuel efficiency and towing capacity.
Legacy
The L8T 6.6L V8, while not as ubiquitous as the Duramax diesel, has proven to be a relatively reliable powertrain. Common maintenance items include regular oil changes and spark plug replacements. The six-speed Hydra-Matic transmission is also known for its durability, provided it is properly maintained. In the used car market, these Silverado 3500 HD variants represent a good value for buyers seeking a capable and affordable heavy-duty truck. They are particularly well-suited for tasks like hauling equipment, towing boats or trailers, and general work truck applications. While the diesel models command a premium, the 6.6L V8 offers a compelling alternative for those prioritizing cost-effectiveness and simplicity.
