2015-2019 Chevrolet Silverado 2500 HD III (K2XX) Double Cab Long Box 6.0 V8 (360 Hp) Automatic

The Chevrolet Silverado 2500 HD III (K2XX) Double Cab Long Box, equipped with the 6.0-liter V8 engine and a six-speed 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 2500HD lineup, offering a balance of capability, comfort, and affordability for buyers needing serious towing and hauling capacity without the premium price tag of the diesel options. 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 2015-2019 Chevrolet Silverado 2500HD Double Cab Long Box with the 6.0L V8 and automatic transmission was a mainstay for those needing a robust work truck. Positioned between the base 4.5L V8 and the more expensive and complex Duramax diesel, this configuration offered a compelling blend of power, capability, and value. The “K2XX” designation refers to the platform code for this generation of Silverado and Sierra HD trucks, representing a significant overhaul in terms of frame strength, interior refinement, and available technology. The Double Cab configuration provided increased rear passenger space compared to the standard cab, while the Long Box offered a generous cargo bed for hauling.

Powertrain & Engine Architecture

At the heart of this Silverado 2500HD 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. It features a cast iron block and aluminum cylinder heads, with two valves per cylinder operated by an overhead valve (OHV) valvetrain. Variable valve timing (VVT) was incorporated to improve fuel efficiency and low-end torque. Fuel delivery is handled by a multi-port fuel injection system. The engine produces 360 horsepower at 5400 rpm and 380 lb-ft (515 Nm) of torque at 4200 rpm.

The engine is mated to a six-speed Hydra-Matic automatic transmission. This transmission was designed to handle the high torque output of the V8 and provide smooth, reliable shifting. The gear ratios were optimized for both towing and everyday driving. The transmission features electronically controlled shifting and a tow/haul mode that alters shift points to improve control when towing heavy loads.

Driving Characteristics

The Silverado 2500HD 6.0L Automatic delivers a driving experience focused on capability rather than outright speed. Acceleration is adequate for daily driving, but the truck truly shines when put to work. The automatic transmission provides smooth shifts, and the tow/haul mode is a valuable asset when towing trailers. Compared to the manual transmission versions, 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 lacks the sheer pulling power of the Duramax, but it is significantly less expensive to purchase and maintain. The gear ratios in the six-speed automatic are well-chosen, providing sufficient torque multiplication for hauling heavy loads without feeling overly strained.

Equipment & Trim Levels

The Silverado 2500HD offered a range of trim levels, with the 6.0L V8 available on most of them. Standard equipment typically included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Higher trim levels added features such as leather upholstery, heated seats, a premium audio system, navigation, and a rearview camera. The Double Cab configuration provided ample space for five passengers, and the Long Box offered a substantial cargo bed. Optional extras included a trailer brake controller, a fifth-wheel hitch, and various appearance packages.

Chassis & Braking

The Silverado 2500HD features a robust fully boxed frame designed to withstand heavy loads and demanding conditions. The front suspension consists of an independent torsion bar setup with double wishbone control arms, while the rear suspension utilizes a traditional leaf spring design. This combination provides a comfortable ride and excellent load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, with ABS (Anti-lock Braking System) standard. The rear brakes are slightly smaller in diameter than the front brakes. The steering system is a cone worm with recirculation balls, providing a solid and predictable feel.

Market Reception & Comparison

The Silverado 2500HD 6.0L Automatic was generally well-received by critics and consumers alike. It was praised for its strong engine, comfortable ride, and spacious interior. However, some reviewers noted that the fuel economy was not particularly impressive, especially when towing. Compared to the diesel variants, the 6.0L V8 offered a lower purchase price and simpler maintenance requirements. It was a popular choice for buyers who needed a capable work truck but didn’t require the ultimate towing capacity of a diesel engine. Fuel economy typically ranged from 14-17 mpg in combined driving.

Legacy

The Vortec L96 6.0L V8 has proven to be a remarkably durable and reliable engine. With proper maintenance, these engines can easily exceed 200,000 miles. The six-speed Hydra-Matic automatic transmission is also known for its reliability. In the used car market, the 2015-2019 Silverado 2500HD 6.0L Automatic remains a popular choice for buyers seeking a capable and affordable heavy-duty truck. Its relative simplicity compared to the diesel models makes it an attractive option for those who prefer to avoid the potential complexities and higher repair costs associated with diesel technology. These trucks continue to be a common sight on job sites and highways across the United States, a testament to their enduring quality and capability.