The 2017-2019 Chevrolet Silverado 3500 HD Double Cab Long Box, equipped with the 6.6-liter Duramax Turbo Diesel V8 engine producing 445 horsepower, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2017 to 2019, this variant occupied a premium position within the K2XX Silverado 3500 HD lineup, catering to buyers requiring substantial towing and hauling capabilities combined with a degree of interior comfort. This model year marked a substantial refresh for the Silverado HD series, focusing on improved functionality and a more refined driving experience.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 3500 HD |
| Generation | Silverado 3500 HD III (K2XX) Double Cab Long Box |
| Type (Engine) | 6.6 Duramax TD V8 (445 Hp) DRW Automatic |
| Start of production | 2017 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 7.7 kg/Hp, 129.1 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 358.1 Nm/tonne |
| Power | 445 Hp @ 2800 rpm |
| Power per litre | 67.4 Hp/l |
| Torque | 1234 Nm @ 1600 rpm (910.15 lb.-ft. @ 1600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Duramax L5P |
| Engine displacement | 6604 cm3 (403 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103 mm (4.06 in.) |
| Piston Stroke | 99 mm (3.9 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | OHV |
| Engine oil capacity | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Coolant | 29.7 l (31.38 US qt | 26.13 UK qt) |
| Kerb Weight | 3446 kg (7597.13 lbs.) |
| Max. weight | 5908 kg (13024.91 lbs.) |
| Max load | 2462 kg (5427.78 lbs.) |
| Trunk (boot) space – maximum | 2162 l (76.35 cu. ft.) |
| Fuel tank capacity | 136 l (35.93 US gal | 29.92 UK gal) |
| Permitted trailer load with brakes (12%) | 9072 kg (20000.34 lbs.) |
| Length | 6321 mm (248.86 in.) |
| Width including mirrors | 2438 mm (95.98 in.) |
| Height | 1972 mm (77.64 in.) |
| Wheelbase | 4017 mm (158.15 in.) |
| Front track | 1748 mm (68.82 in.) |
| Rear (Back) track | 1906 mm (75.04 in.) |
| Minimum turning circle (turning diameter) | 16.1 m (52.82 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Allison |
| 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 |
| Tires size | 235/80 R17; 265/70 R18 |
| Wheel rims size | 7.5J x 17; 8J x 18 |
INTRODUCTION
The 2017-2019 Chevrolet Silverado 3500 HD Double Cab Long Box with the 6.6L Duramax diesel and Allison automatic transmission was designed to be a workhorse. Built on the K2XX platform, this generation represented a move towards increased strength and capability. The Double Cab configuration offered a balance between passenger space and bed length, making it suitable for both work and family needs. This particular variant, with its powerful diesel engine and robust transmission, was aimed at customers who frequently tow large trailers, haul heavy loads, or require a dependable truck for demanding tasks. It sat at the top of the Silverado 3500 HD range, offering more power and capability than the gasoline engine options.
Powertrain & Engine Architecture
The heart of this Silverado 3500 HD is the Duramax L5P 6.6-liter turbocharged diesel V8. This engine is a testament to modern diesel technology, featuring a cast iron block, aluminum cylinder heads, and a robust rotating assembly. The L5P utilizes a common-rail direct fuel injection system, delivering fuel at extremely high pressures for optimized combustion. The turbocharger, coupled with an intercooler, provides increased air intake, boosting power and torque. The engine produces 445 horsepower at 2800 rpm and a massive 910 lb-ft of torque at 1600 rpm. The Allison 1000 Series six-speed automatic transmission is specifically designed to handle the immense power output of the Duramax engine. This transmission features electronically controlled shifts and a heavy-duty torque converter, ensuring smooth and reliable operation even under extreme loads. The transmission’s gear ratios are optimized for both towing and fuel efficiency.
Driving Characteristics
The Silverado 3500 HD with the Duramax/Allison combination delivers a driving experience that prioritizes capability and control. While not a sports truck, the ample torque allows for confident acceleration, even when heavily loaded. The Allison transmission shifts smoothly and decisively, providing seamless power delivery. Compared to the 6.0L gasoline V8 option, the Duramax offers significantly more low-end torque, making it far superior for towing. The automatic transmission, while convenient, doesn’t offer the same level of control as a manual transmission, but it simplifies operation for drivers who spend long hours behind the wheel. The long wheelbase and heavy-duty suspension contribute to a stable and comfortable ride, even on rough roads.
Equipment & Trim Levels
The Silverado 3500 HD Double Cab Long Box with the Duramax engine was typically offered in LT, LTZ, and High Country trim levels. Even the base LT trim included features like air conditioning, power windows and locks, a rearview camera, and a basic infotainment system. The LTZ trim added features such as leather upholstery, heated front seats, a premium audio system, and additional chrome exterior trim. The High Country trim represented the pinnacle of luxury, offering features like ventilated front seats, a navigation system, and unique interior and exterior styling cues. Optional extras included a sunroof, a rear-seat entertainment system, and various towing packages.
Chassis & Braking
The Silverado 3500 HD features a fully boxed frame constructed from high-strength steel, providing a solid foundation for the truck’s heavy-duty capabilities. The front suspension utilizes an independent torsion bar setup with double wishbone control arms, while the rear suspension employs a traditional leaf spring design. This configuration provides a good balance between ride comfort and load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when towing. An Anti-lock Braking System (ABS) is standard, enhancing safety and control. The rear axle ratio varied depending on the specific configuration, influencing both towing capacity and fuel economy.
Market Reception & Comparison
The 2017-2019 Silverado 3500 HD with the Duramax engine received generally positive reviews from automotive critics. It was praised for its powerful engine, smooth transmission, and impressive towing capabilities. Compared to its rivals, such as the Ford Super Duty and Ram 3500, the Silverado 3500 HD offered a competitive combination of power, features, and value. Fuel economy, while not a primary concern for heavy-duty truck buyers, was generally considered to be acceptable for a vehicle of this size and capability. Reliability was also a strong point, with the Duramax engine and Allison transmission proving to be durable and dependable.
Legacy
The Duramax L5P engine and Allison 1000 transmission have established a strong reputation for reliability and longevity. These powertrains continue to be highly regarded in the used truck market, commanding premium prices. The 2017-2019 Silverado 3500 HD remains a popular choice for buyers seeking a capable and dependable heavy-duty truck. Regular maintenance, including oil changes and filter replacements, is crucial for ensuring the long-term health of the Duramax engine and Allison transmission. With proper care, these trucks can provide many years of reliable service.
