2007-2010 Chevrolet Silverado 3500 HD II (GMT900) Regular Cab Long Box 6.0 V8 (360 Hp) SRW Automatic

The Chevrolet Silverado 3500 HD II (GMT900) Regular 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 2007 to 2010, this variant occupied a crucial position in the Silverado 3500 HD lineup, offering a balance between capability and usability for customers needing substantial towing and hauling capacity. It was part of the GMT900 generation, a redesign focused on improving interior space, ride quality, and overall refinement compared to its predecessors. This particular configuration, with its standard rear-wheel drive and long bed, was aimed at professionals and individuals requiring a robust work truck without the added complexity or cost of four-wheel drive.

Technical Specifications

Powertrain & Engine Architecture

At the heart of this Silverado 3500 HD II lies the Vortec LY6 6.0-liter V8 engine. This engine, a member of Chevrolet’s Vortec family, is known for its robust construction and reliable performance. The LY6 utilizes a cast iron block and aluminum cylinder heads, contributing to its durability. It features a 9.6:1 compression ratio and utilizes a multi-port fuel injection system for precise fuel delivery. The overhead valve (OHV) valvetrain, while a more traditional design, proved to be dependable and relatively easy to maintain. The engine produces 360 horsepower at 5400 rpm and 515 Nm (379.84 lb-ft) of torque at 4200 rpm. This torque output is particularly important for heavy-duty applications, providing ample pulling power. The engine is longitudinally mounted in the chassis. The transmission paired with the LY6 is a 6-speed Hydra-Matic automatic. This transmission was chosen for its ability to handle the engine’s torque output and provide smooth, reliable shifting in demanding conditions. The automatic transmission offered ease of use, particularly appealing to drivers who frequently operate in stop-and-go traffic or tow heavy loads.

Driving Characteristics

The 6.0L V8 and 6-speed automatic combination in the Silverado 3500 HD II delivered a capable, if not particularly sporty, driving experience. The automatic transmission, while smooth, prioritized functionality over outright performance. Gear ratios were optimized for towing and hauling, meaning acceleration wasn’t as brisk as some of the lighter-duty Silverado trims. However, the engine’s substantial torque allowed for confident passing maneuvers and effortless towing. Compared to the available diesel options (like the Duramax), this gasoline engine offered a lower initial cost but sacrificed fuel economy and ultimate towing capacity. Compared to a manual transmission equipped Silverado 3500, the automatic offered less driver control but greater convenience, especially in challenging conditions. The truck felt planted and stable, even when carrying heavy loads, thanks to its robust suspension and long wheelbase.

Equipment & Trim Levels

The Silverado 3500 HD II Regular Cab Long Box with the 6.0L V8 typically came standard with features geared towards work-truck functionality. This included a basic audio system, vinyl upholstery, and manual windows and locks. Air conditioning was often standard, but higher-end features like power windows, power locks, and a premium sound system were typically optional. The interior was designed for durability and ease of cleaning, reflecting its intended use. Optional extras included upgraded trim packages, towing packages (adding features like trailer brake controllers), and various convenience options. The Regular Cab configuration meant a focus on practicality and affordability, lacking the passenger space of extended or crew cab models.

Chassis & Braking

The Silverado 3500 HD II utilized a body-on-frame construction, providing a solid and durable platform for heavy-duty use. The front suspension featured an independent torsion bar setup with double wishbones, offering a reasonable ride quality for a heavy-duty truck. The rear suspension employed a traditional leaf spring setup, designed to handle heavy loads. Braking duties were handled by ventilated discs on all four wheels, with the front discs measuring 325x38mm and the rear discs measuring 325x30mm. An Anti-lock Braking System (ABS) was standard, enhancing safety and control during braking. Steering was accomplished via a cone worm with recirculation balls system.

Market Reception & Comparison

The Silverado 3500 HD II with the 6.0L V8 and automatic transmission was generally well-received as a capable and affordable heavy-duty truck. Critics praised its robust engine and transmission, as well as its comfortable ride quality for a truck of its size. However, fuel economy was a common criticism, as the gasoline engine was less efficient than the available diesel options. Compared to the Duramax diesel, the 6.0L V8 offered a lower purchase price but higher operating costs due to fuel consumption. It also provided less ultimate towing capacity. The 6.0L V8 was often seen as a good choice for owners who didn’t require the maximum towing capacity of a diesel but still needed a powerful and reliable truck.

Legacy

The Vortec LY6 6.0L V8 engine, when paired with the 6-speed Hydra-Matic automatic, has proven to be a relatively reliable powertrain. While not without its potential issues (such as Active Fuel Management system problems in some cases), the engine is generally considered durable and capable of lasting for many miles with proper maintenance. In the used car market today, these Silverado 3500 HD II trucks are often sought after by those needing a dependable work truck at a reasonable price. Their affordability and proven reliability make them a popular choice for contractors, farmers, and anyone requiring a heavy-duty pickup. Parts availability remains good, and the relatively simple design of the engine makes it relatively easy to repair.