The GMC Sierra 2500HD IV (GMTK2XX) Crew Cab Standard Box, equipped with the 6.0-liter V8 engine producing 360 horsepower and paired with a four-wheel-drive automatic transmission, represents a significant iteration in GMC’s heavy-duty truck lineage. Produced from 2015 to 2019, this configuration occupied a sweet spot in the Sierra 2500HD lineup, offering a balance of capability, comfort, and affordability for buyers needing serious towing and hauling capacity. It was part of the fourth generation of the Sierra HD series, built on the GMTK2XX platform, which brought improvements in ride quality, interior refinement, and technology compared to its predecessors.
Technical Specifications
| Brand | GMC |
| Model | Sierra 2500HD |
| Generation | Sierra 2500HD IV (GMTK2XX) Crew Cab Standard Box |
| Type (Engine) | 6.0 V8 (360 Hp) 4WD Automatic |
| Start of production | 2015 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.2 kg/Hp, 121.5 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 173.8 Nm/tonne |
| Power | 360 Hp @ 5400 rpm |
| Power per litre | 60.4 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 L96 |
| Engine displacement | 5965 cm3, 364.01 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, VVT |
| Engine oil capacity | 5.7 l, 6.02 US qt | 5.02 UK qt |
| Coolant | 16.1 l, 17.01 US qt | 14.17 UK qt |
| Kerb Weight | 2963 kg, 6532.3 lbs. |
| Max. weight | 4309 kg, 9499.72 lbs. |
| Max load | 1346 kg, 2967.42 lbs. |
| Trunk (boot) space – maximum | 1728 l, 61.02 cu. ft. |
| Fuel tank capacity | 136 l, 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 5897 kg, 13000.66 lbs. |
| Length | 6083 mm, 239.49 in. |
| Width including mirrors | 2045 mm, 80.51 in. |
| Height | 1987 mm, 78.23 in. |
| Wheelbase | 3904 mm, 153.7 in. |
| Front track | 1748 mm, 68.82 in. |
| Rear (Back) track | 1709 mm, 67.28 in. |
| Ride height (ground clearance) | 208 mm, 8.19 in. |
| Minimum turning circle (turning diameter) | 15.7 m, 51.51 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 |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 350×40 mm |
| Rear brakes | Ventilated discs, 360×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 20 |
Powertrain & Engine Architecture
At the heart of this Sierra 2500HD variant lies the Vortec L96 6.0-liter V8 engine. This engine, a staple in GM’s truck lineup for many years, is a cast-iron block, overhead valve (OHV) design. It utilizes a multi-port fuel injection system, delivering fuel directly into the intake ports. Variable valve timing (VVT) was incorporated to optimize performance and fuel efficiency across the engine’s operating range. The L96 produces 360 horsepower at 5400 rpm and 515 lb-ft of torque at 4200 rpm, making it well-suited for heavy-duty tasks. The engine is longitudinally mounted in the chassis. The automatic transmission used is a 6-speed unit, providing smooth and efficient gear changes. This transmission was specifically tuned for the high torque output of the L96, offering appropriate gear ratios for towing and hauling.
Driving Characteristics
The 6.0L V8 with the 6-speed automatic delivers a robust driving experience. While not as quick as some of the diesel-powered or higher-output gasoline variants, it provides ample power for everyday driving and demanding work. The automatic transmission is well-matched to the engine’s torque curve, providing smooth acceleration and confident passing power. The gear ratios are optimized for towing, allowing the truck to maintain speed even when hauling heavy loads. Compared to the 6.6L Duramax diesel, this gasoline engine is quieter and smoother, but lacks the diesel’s immense low-end torque. Compared to the 6.2L gasoline engine, the 6.0L offers a more affordable entry point into the heavy-duty truck segment, albeit with slightly less power.
Equipment & Trim Levels
The Crew Cab Standard Box configuration typically came with a generous amount of standard equipment. This included air conditioning, power windows and locks, a basic infotainment system with a touchscreen display, and a rearview camera. Higher trim levels, such as the SLT and Denali, added features like leather upholstery, heated and ventilated seats, a premium sound system, and advanced safety technologies. Optional extras included a navigation system, a sunroof, and various towing packages. The interior materials were generally durable and functional, reflecting the truck’s work-oriented nature.
Chassis & Braking
The Sierra 2500HD IV features a robust chassis designed to handle heavy loads. The front suspension utilizes coil springs and a double wishbone setup, while the rear suspension employs a traditional leaf spring design. This configuration provides a comfortable ride while maintaining excellent load-carrying capacity. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) is standard. The truck’s steering system is a cone worm with recirculation balls, offering precise and responsive handling.
Market Reception & Comparison
The 6.0L V8/automatic combination was well-received by buyers seeking a capable and affordable heavy-duty truck. Critics praised its smooth ride, comfortable interior, and ample power. However, some noted that its fuel economy was not as good as the diesel options. Compared to the Duramax diesel, the 6.0L gasoline engine offered a lower initial cost but higher operating costs due to fuel consumption. Reliability was generally good, although some owners reported issues with the active fuel management system, which deactivated cylinders to improve fuel economy.
Legacy
The GMC Sierra 2500HD IV (GMTK2XX) with the 6.0L V8 and automatic transmission remains a popular choice in the used truck market. Its robust powertrain and capable chassis make it a reliable workhorse for years to come. While newer trucks offer more advanced technology and features, this generation provides a compelling combination of capability, affordability, and durability. The L96 engine, while not the most fuel-efficient, is known for its longevity and relatively simple maintenance requirements, making it a practical choice for buyers seeking a dependable heavy-duty truck.
