The Chevrolet Silverado 2500 HD IV (T1XX) Regular Cab Long Bed, equipped with the 6.6-liter V8 engine producing 401 horsepower and paired with a 6-speed automatic transmission, represents a work-focused iteration of Chevrolet’s heavy-duty pickup truck lineage. Produced from 2020 through 2023, this configuration occupied a significant position within the fourth generation (T1XX) Silverado HD lineup, catering to buyers prioritizing substantial towing and hauling capabilities over luxury or advanced technology. It served as a robust option for commercial users, farmers, and individuals requiring a dependable, high-capacity pickup.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 2500 HD |
| Generation | Silverado 2500 HD IV (T1XX) Regular Cab Long Bed |
| Type (Engine) | 6.6 V8 (401 Hp) Automatic |
| Start of production | 2020 |
| End of production | 2023 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 2 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.9 kg/Hp, 144.8 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 227.2 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 | 14.6 l (15.43 US qt | 12.85 UK qt) |
| Kerb Weight | 2769 kg (6104.6 lbs) |
| Max. weight | 4536 kg (10000.17 lbs) |
| Max load | 1767 kg (3895.57 lbs) |
| 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 | 5982 mm (235.51 in) |
| Width including mirrors | 2076 mm (81.73 in) |
| Height | 2030 mm (79.92 in) |
| Wheelbase | 3595 mm (141.54 in) |
| Front track | 1731 mm (68.15 in) |
| Rear (Back) track | 1736 mm (68.35 in) |
| Ride height (ground clearance) | 259 mm (10.2 in) |
| Drivetrain Architecture | Rear wheel drive. Internal Combustion engine (ICE) |
| 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 | 235/80 R17; 265/70 R17; 245/75 R17; 275/70 R18 |
| Wheel rims size | 7.5J x 17; 8J x 18 |
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD variant lies the 6.6-liter L8T V8 gasoline engine. This engine is a naturally aspirated, overhead valve (OHV) design featuring variable valve timing (VVT). Direct fuel injection is employed to optimize combustion efficiency and 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 ability to handle the high torque output of the V8 engine. The transmission’s gear ratios are tuned for towing and hauling, prioritizing low-end grunt over rapid acceleration.
Driving Characteristics
The 6.6L V8 and 6-speed automatic combination delivers a robust, if not particularly refined, driving experience. Acceleration is adequate for everyday driving, but the truck’s substantial weight (approximately 6,100 lbs) limits its responsiveness. The automatic transmission shifts smoothly under normal conditions, but can sometimes feel hesitant when downshifting for passing maneuvers. The emphasis is clearly on work capability. When towing, the transmission’s gear ratios and the engine’s torque curve provide ample power to maintain speed on inclines. Compared to the available Duramax diesel engine, this gasoline variant offers less torque and lower fuel economy, but a lower initial purchase price and potentially lower maintenance costs.
Equipment & Trim Levels
The Regular Cab Long Bed 2500 HD with the 6.6L V8 typically served as the entry point into the Silverado HD lineup. Standard equipment included air conditioning, a basic infotainment system with a touchscreen display, and vinyl upholstery. Work Truck trims were particularly spartan, focusing on functionality. Higher trims, such as the LT, added features like cloth or leather upholstery, upgraded infotainment systems, and convenience features like power windows and locks. Optional extras included a trailer brake controller, a towing package, and various appearance upgrades.
Chassis & Braking
The Silverado 2500 HD IV utilizes a fully boxed frame for enhanced rigidity and durability. The front suspension consists of an independent torsion bar setup with double wishbones, while the rear suspension employs a traditional leaf spring design. This configuration is optimized for heavy-duty hauling and towing. Braking duties are handled by ventilated disc brakes at all four corners, providing adequate stopping power for the truck’s weight. An Anti-lock Braking System (ABS) is standard. The rear axle ratios varied depending on the specific configuration, influencing both towing capacity and fuel economy.
Market Reception & Comparison
Critics generally acknowledged the Silverado 2500 HD’s robust capabilities, but noted that the 6.6L V8/automatic combination wasn’t as refined or fuel-efficient as the Duramax diesel option. The gasoline engine was praised for its lower upfront cost and simpler maintenance requirements. However, the diesel engine offered significantly more torque and better fuel economy, making it the preferred choice for those who frequently tow heavy loads. Compared to competitors like the Ford Super Duty and Ram Heavy Duty, the Silverado 2500 HD offered a competitive combination of price, capability, and reliability.
Legacy
The 6.6L L8T V8 engine paired with the 6-speed automatic transmission has proven to be a relatively reliable powertrain in the Silverado 2500 HD. While not as sought-after as the Duramax diesel, these gasoline-powered trucks represent a cost-effective option for buyers who don’t require the ultimate in towing capacity or fuel efficiency. On the used car market, these models typically command lower prices than their diesel counterparts, making them an attractive option for budget-conscious buyers. Regular maintenance, including oil changes and transmission fluid flushes, is crucial for ensuring the long-term reliability of this powertrain.
