2015-2019 Chevrolet Silverado 3500 HD III (K2XX) Double Cab Long Box 6.0 V8 (360 Hp) DRW Automatic

The Chevrolet Silverado 3500 HD III (K2XX) Double Cab Long Box, equipped with the 6.0-liter V8 engine producing 360 horsepower and paired with an automatic transmission, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2015 to 2019, this variant occupied a sweet spot in the Silverado 3500HD lineup, offering a balance of capability, comfort, and affordability for buyers needing serious towing and hauling capacity. It was part of the third generation of the K2XX platform, known for its enhanced strength and refinement compared to its predecessors.

Technical Specifications

INTRODUCTION

The Chevrolet Silverado 3500HD III (K2XX) Double Cab Long Box with the 6.0L V8 and automatic transmission was a mainstay of Chevrolet’s heavy-duty truck offerings from 2015-2019. Positioned as a mid-range option within the 3500HD lineup, it catered to customers who required substantial towing and payload capacity but didn’t necessarily need the diesel engine’s higher torque output or the associated price premium. The “Double Cab” configuration provided a larger rear seating area than the standard cab, making it suitable for both work and family use, while the “Long Box” bed offered ample cargo space. This truck was primarily sold in the North American market, competing directly with Ford’s Super Duty and Ram’s heavy-duty trucks.

Powertrain & Engine Architecture

At the heart of this Silverado 3500HD variant lies the Vortec L96 6.0-liter V8 engine. This engine is a member of Chevrolet’s small-block V8 family, known for its durability and relatively simple design. The L96 features a cast iron block and aluminum cylinder heads, utilizing a 9.6:1 compression ratio and a multi-port fuel injection system. The overhead valve (OHV) valvetrain, coupled with variable valve timing (VVT), helps optimize performance and fuel efficiency. The engine produces 360 horsepower at 5400 rpm and 380 lb-ft (515 Nm) of torque at 4200 rpm. The Hydra-Matic 6L90 six-speed automatic transmission was the sole transmission option for this configuration. This transmission is known for its robustness and smooth shifting characteristics, designed to handle the high torque output of the V8 engine and the demands of heavy towing. The transmission features electronically controlled shifting and tow/haul mode for optimized performance when towing.

Driving Characteristics

The 6.0L V8 and 6L90 automatic combination delivers a capable, if not exhilarating, driving experience. While it lacks the low-end grunt of the Duramax diesel, the gasoline V8 provides ample power for everyday driving and most towing scenarios. The automatic transmission is well-tuned, offering smooth and predictable shifts. Compared to the manual transmission equipped Silverado 3500HD, the automatic offers greater convenience, especially in stop-and-go traffic. However, the manual transmission generally provides slightly better fuel economy and a more direct connection to the engine. Compared to the diesel variants, the 6.0L V8 is noticeably less powerful, particularly when fully loaded or towing heavy trailers. The gear ratios in the 6L90 are optimized for towing, providing sufficient torque multiplication to handle substantial loads. Acceleration is adequate, but not sporty, with a 0-60 mph time estimated around 7.5-8.5 seconds.

Equipment & Trim Levels

The Silverado 3500HD III Double Cab Long Box 6.0L V8 was available in several trim levels, including WT (Work Truck), LT, and LTZ. The WT trim was the base model, offering essential features like air conditioning, a basic audio system, and vinyl upholstery. The LT trim added features such as cloth upholstery, power windows and locks, and an upgraded audio system. The LTZ trim was the most luxurious, offering leather upholstery, heated and ventilated front seats, a premium audio system, and additional chrome exterior trim. Standard equipment across most trims included a rearview camera, trailer sway control, and a locking rear differential. Optional extras included a navigation system, a sunroof, and various towing packages.

Chassis & Braking

The Silverado 3500HD III utilizes a fully boxed frame for enhanced strength and rigidity. The front suspension consists of an independent torsion bar setup with double wishbone control arms, while the rear suspension employs a traditional leaf spring design. This configuration provides a comfortable ride while maintaining excellent load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when towing heavy loads. An Anti-lock Braking System (ABS) is standard. The rear axle is a heavy-duty full-floating design, capable of handling significant weight. The steering system is a recirculating ball type, providing a stable and predictable steering feel.

Market Reception & Comparison

The Silverado 3500HD III 6.0L V8 Automatic received generally positive reviews. Critics praised its robust construction, comfortable ride, and capable towing performance. However, some noted that the gasoline engine lacked the torque of the diesel option and that fuel economy was relatively poor compared to other trucks in its class. Compared to the 6.6L Duramax diesel, the 6.0L V8 offered a lower initial purchase price but significantly less towing capacity and fuel efficiency. The 6.0L V8 was often favored by buyers who primarily used their trucks for lighter-duty tasks and didn’t require the extreme towing capabilities of the diesel. Reliability was generally good, with the L96 engine proving to be a durable and dependable powerplant.

Legacy

The Chevrolet Silverado 3500HD III 6.0L V8 Automatic remains a popular choice in the used truck market. Its relatively simple design and proven reliability make it a relatively easy and affordable truck to maintain. While fuel economy is not its strong suit, its robust construction and capable towing performance continue to appeal to buyers seeking a dependable heavy-duty truck. The L96 engine is known for its longevity, and many examples are still in service today with well over 200,000 miles. The K2XX platform proved to be a successful and durable design, laying the foundation for future generations of Chevrolet heavy-duty trucks.