The GMC Sierra 3500HD IV, produced from 2015 to 2019, represents the fourth generation of GMC’s heavy-duty full-size pickup truck. This iteration, based on the GMTK2XX platform, was designed to offer increased capability, refinement, and technology compared to its predecessors. Within the Sierra 3500HD lineup, the Crew Cab Standard Box configuration with the 6.0-liter V8 engine and six-speed automatic transmission occupied a significant middle ground, appealing to buyers needing substantial towing and payload capacity without the added expense of diesel power or higher trim levels. This variant was a popular choice for both commercial and personal use, balancing work-truck practicality with a degree of everyday comfort.
Technical Specifications
| Brand | GMC |
| Model | Sierra 3500HD |
| Generation | Sierra 3500HD IV (GMTK2XX) Crew Cab Standard Box |
| Type (Engine) | 6.0 V8 (360 Hp) SRW 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 | 8.1 kg/Hp, 123.8 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 177 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 L96 |
| 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, 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 | 2909 kg, 6413.25 lbs |
| Max. weight | 4763 kg, 10500.62 lbs |
| Max load | 1854 kg, 4087.37 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 | 1990 mm, 78.35 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) | 218 mm, 8.58 in |
| Minimum turning circle (turning diameter) | 15.8 m, 51.84 ft |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 355×40 mm |
| Rear brakes | Ventilated discs, 373×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 235/80 R17; 265/70 R18 |
| Wheel rims size | 7.5J x 17; 8J x 18 |
Powertrain & Engine Architecture
At the heart of this Sierra 3500HD variant lies the Vortec L96 6.0-liter V8 engine. This engine is a member of the Vortec family, known for its robust construction and relatively simple design. The L96 features a cast iron block and aluminum cylinder heads, utilizing a 9.6:1 compression ratio and multi-port fuel injection. The overhead valve (OHV) valvetrain, while not as technologically advanced as overhead cam designs, contributes to the engine’s durability and ease of maintenance. Variable valve timing (VVT) was incorporated to improve fuel efficiency and low-end torque. The engine produces 360 horsepower at 5400 rpm and 380 lb-ft of torque at 4200 rpm. Power is delivered to the rear wheels through a six-speed Hydra-Matic automatic transmission, a reliable unit known for its smooth shifting and durability. This transmission was specifically tuned for heavy-duty applications, featuring reinforced components to handle the high torque output of the V8 engine.
Driving Characteristics
The 6.0-liter V8 and six-speed automatic combination in the Sierra 3500HD provides a balance between power and usability. While not as quick as the available diesel options, the gasoline engine delivers ample power for everyday driving and towing. The automatic transmission offers smooth and predictable shifts, making it easy to manage in various driving conditions. Compared to manual transmission equipped models, the automatic prioritizes convenience over outright performance. The gear ratios are optimized for towing, providing strong low-end torque for hauling heavy loads. However, this can result in higher engine speeds at highway cruising speeds, potentially impacting fuel economy. The weight of the truck, combined with the engine’s torque curve, means that acceleration is adequate but not exhilarating.
Equipment & Trim Levels
The Sierra 3500HD with the 6.0L V8 and automatic transmission typically came standard with a respectable array of features. Base models included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. The Crew Cab configuration offered spacious seating for five passengers. Optional extras included upgraded audio systems, leather upholstery, heated and ventilated front seats, a navigation system, and various driver-assistance features. The SLE and SLT trim packages added further refinements, such as chrome exterior accents, upgraded interior materials, and additional convenience features. This configuration generally sat in the mid-range of the Sierra 3500HD lineup, offering a good balance of features and affordability.
Chassis & Braking
The Sierra 3500HD’s chassis is built for heavy-duty work. The front suspension utilizes coil springs and a double wishbone design, while the rear suspension employs a traditional leaf spring setup. A transverse stabilizer bar helps to reduce body roll during cornering. 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 truck’s robust frame and heavy-duty suspension components contribute to its impressive towing and payload capacity. The rear axle ratio varied depending on the specific configuration, influencing both towing performance and fuel economy.
Market Reception & Comparison
The 6.0-liter V8-powered Sierra 3500HD received generally positive reviews, particularly from buyers who prioritized affordability and simplicity over the higher cost and complexity of diesel engines. Critics noted the engine’s ample power for most tasks, but also pointed out its lower fuel economy compared to the diesel options. Compared to the 6.6-liter Duramax diesel, the 6.0L V8 offered significantly less torque and towing capacity, but at a lower purchase price. Maintenance costs for the 6.0L V8 were generally lower than those for the Duramax diesel, due to the simpler engine design and fewer specialized components. The 6.0L automatic combination was often seen as a good choice for buyers who primarily used their trucks for personal use or light-duty commercial applications.
Legacy
The GMTK2XX Sierra 3500HD with the 6.0-liter V8 and automatic transmission has proven to be a relatively reliable powertrain combination. The Vortec L96 engine is known for its durability, and the Hydra-Matic transmission is generally considered to be a robust unit. On the used car market, these trucks remain popular due to their affordability and capability. However, potential buyers should be aware of potential issues such as oil consumption and Active Fuel Management (AFM) system problems. Regular maintenance and careful inspection are essential to ensure long-term reliability. Overall, this Sierra 3500HD variant represents a solid and dependable heavy-duty pickup truck that continues to provide value to owners today.
