The Chevrolet Silverado 2500 HD II, specifically the Extended Cab Standard Box configuration with the 6.0-liter V8 engine producing 360 horsepower and paired with a four-wheel drive system and automatic transmission, represents a significant iteration in Chevrolet’s heavy-duty truck lineage. Produced from 2007 through 2010 (GMT900 platform), this variant aimed to provide a balance between capability, comfort, and usability for American truck buyers needing substantial towing and hauling capacity. It occupied a middle ground within the 2500HD lineup, offering more power and capability than the base models, but remaining more accessible than the diesel-powered options.
Technical Specifications
| Brand | Chevrolet |
| Model | Silverado 2500 HD |
| Generation | Silverado 2500 HD II (GMT900) Extended Cab Standard Box |
| Type (Engine) | 6.0 V8 (360 Hp) 4WD Automatic |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.4 kg/Hp, 135.9 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 194.4 Nm/tonne |
| Power | 360 Hp @ 5400 rpm |
| Power per litre | 60.3 Hp/l |
| Torque | 515 Nm @ 4200 rpm, 379.84 lb.-ft. @ 4200 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Vortec LY6 |
| Engine displacement | 5967 cm3, 364.13 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 101.6 mm, 4 in. |
| Piston Stroke | 92 mm, 3.62 in. |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 5.7 l, 6.02 US qt | 5.02 UK qt |
| Coolant | 15.5 l, 16.38 US qt | 13.64 UK qt |
| Kerb Weight | 2649 kg, 5840.05 lbs. |
| Max. weight | 4173 kg, 9199.89 lbs. |
| Max load | 1524 kg, 3359.84 lbs. |
| Trunk (boot) space – maximum | 1718 l, 60.67 cu. ft. |
| Fuel tank capacity | 98 l, 25.89 US gal | 21.56 UK gal |
| Permitted trailer load with brakes (12%) | 5625 kg, 12401 lbs. |
| Length | 5850 mm, 230.31 in. |
| Width including mirrors | 2032 mm, 80 in. |
| Height | 1951 mm, 76.81 in. |
| Wheelbase | 3645 mm, 143.5 in. |
| Front track | 1744 mm, 68.66 in. |
| Rear (Back) track | 1676 mm, 65.98 in. |
| Ride height (ground clearance) | 243 mm, 9.57 in. |
| Minimum turning circle (turning diameter) | 14.5 m, 47.57 ft. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| 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, 325×38 mm |
| Rear brakes | Ventilated discs, 325×30 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 245/75 R16; 265/75 R17 |
| Wheel rims size | 6.5J x 16; 7.5J x 17 |
Powertrain & Engine Architecture
At the heart of this Silverado 2500 HD variant lies the Vortec LY6 6.0-liter V8 engine. This engine is a member of Chevrolet’s Vortec family, known for its robust construction and relatively simple design. The LY6 features a cast iron block and aluminum cylinder heads, contributing to its durability. It utilizes a multi-port fuel injection system, delivering fuel directly to each cylinder for efficient combustion. The overhead valve (OHV) valvetrain, while not as technologically advanced as overhead cam designs, is known for its reliability and ease of maintenance. The engine produces 360 horsepower at 5400 rpm and 515 Nm (379.84 lb-ft) of torque at 4200 rpm. This torque output is crucial for heavy-duty tasks like towing and hauling. The engine is mated to a six-speed Hydra-Matic automatic transmission, providing smooth and efficient gear changes. This transmission was designed to handle the high torque output of the V8 engine and provide adequate gear ratios for both on-road driving and demanding work applications.
Driving Characteristics
The 6.0-liter V8 and automatic transmission combination delivered a driving experience focused on usability and capability rather than outright performance. Acceleration was adequate for everyday driving, but the truck’s substantial weight limited its responsiveness. The automatic transmission, while smooth, wasn’t particularly quick to downshift, especially when fully loaded. However, the ample torque available at lower RPMs made it well-suited for towing and hauling. The 4WD system provided enhanced traction in challenging conditions, making it a capable work truck. Compared to the diesel-powered Silverado 2500HD models, this gasoline variant offered less torque and lower fuel economy, but it was significantly more affordable and quieter in operation. The manual transmission options, when available, offered more driver control and slightly improved fuel efficiency, but the automatic was favored by many buyers for its convenience.
Equipment & Trim Levels
The Silverado 2500 HD II in this configuration typically came standard with features like air conditioning, power windows and locks, and a basic audio system. The Extended Cab configuration provided additional rear seating, making it more practical for families or work crews. Upholstery was typically cloth, with optional leather available on higher trim levels. Common optional extras included a premium audio system, power-adjustable seats, and a navigation system. The specific trim level (e.g., Work Truck, LT, LTZ) determined the level of standard equipment and available options.
Chassis & Braking
The Silverado 2500 HD II featured a robust chassis designed to withstand heavy loads. The front suspension utilized an independent torsion bar and double wishbone setup, providing a comfortable ride and good handling. The rear suspension employed a traditional leaf spring design, known for its durability and load-carrying capacity. Braking duties were handled by ventilated disc brakes on all four wheels, providing adequate stopping power. An Anti-lock Braking System (ABS) was standard, enhancing safety during emergency braking situations. The truck’s substantial weight and high center of gravity meant that handling was not as nimble as lighter vehicles, but the suspension system did a good job of mitigating body roll.
Market Reception & Comparison
The 6.0-liter V8-powered Silverado 2500 HD II was generally well-received by truck buyers seeking a capable and affordable heavy-duty option. Critics praised its robust engine and transmission, as well as its comfortable ride. However, its fuel economy was often criticized, especially compared to the diesel-powered alternatives. In terms of reliability, the LY6 engine proved to be relatively dependable, although some owners reported issues with the automatic transmission. Compared to the Duramax diesel engine, the 6.0-liter V8 offered a lower initial cost but higher long-term operating costs due to fuel consumption and potential maintenance needs.
Legacy
The Chevrolet Silverado 2500 HD II with the 6.0-liter V8 and automatic transmission remains a popular choice in the used truck market today. Its affordability, capability, and relatively simple mechanical design make it an attractive option for buyers seeking a reliable work truck. While the diesel-powered models command higher prices, the 6.0-liter V8 variant offers a compelling value proposition for those who don’t require the ultimate in towing capacity or fuel efficiency. The LY6 engine is known for its longevity, and with proper maintenance, these trucks can provide many years of reliable service.
