The GMC Sierra 3500HD III, specifically the Crew Cab Long Box configuration with the 6.0-liter V8 engine and four-wheel drive, represents a significant iteration in GMC’s heavy-duty truck lineage. Produced from 2011 to 2013 as part of the GMT900 platform’s facelift, this variant was aimed at buyers needing substantial towing and hauling capacity combined with a degree of passenger comfort. It occupied a sweet spot in the Sierra 3500HD lineup, offering a balance between capability and usability for both work and personal use. This model year saw refinements to the interior and exterior styling, along with improvements to the powertrain for enhanced efficiency and durability.
Technical Specifications
| Brand | GMC |
| Model | Sierra 3500HD |
| Generation | Sierra 3500HD III (GMT900, facelift 2011) Crew Cab Long Box |
| Type (Engine) | 6.0 V8 (360 Hp) 4WD DRW Automatic |
| Start of production | 2011 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 9.1 kg/Hp, 109.7 Hp/tonne |
| Weight-to-torque ratio | 6.4 kg/Nm, 156.9 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 | 15.5 l, 16.38 US qt | 13.64 UK qt |
| Kerb Weight | 3283 kg, 7237.78 lbs. |
| Max. weight | 5908 kg, 13024.91 lbs. |
| Max load | 2625 kg, 5787.13 lbs. |
| Trunk (boot) space – maximum | 2138 l, 75.5 cu. ft. |
| Fuel tank capacity | 136 l, 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 5988 kg, 13201.28 lbs. |
| Length | 6581 mm, 259.09 in. |
| Width including mirrors | 2436 mm, 95.91 in. |
| Height | 1979 mm, 77.91 in. |
| Wheelbase | 4260 mm, 167.72 in. |
| Front track | 1748 mm, 68.82 in. |
| Rear (Back) track | 1906 mm, 75.04 in. |
| Ride height (ground clearance) | 213 mm, 8.39 in. |
| Minimum turning circle (turning diameter) | 16.9 m, 55.45 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, 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 |
Powertrain & Engine Architecture
At the heart of this Sierra 3500HD lies the Vortec L96 6.0-liter V8 engine. This engine is a member of the Vortec family, known for its robust construction and reliable performance. The L96 features a cast iron block and aluminum cylinder heads, contributing to its durability. It utilizes a multi-port fuel injection system for precise fuel delivery and is equipped with overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance and efficiency across the rev range. 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 towing and hauling. The engine is longitudinally mounted in the chassis. Paired with the L96 is the Hydra-Matic 6-speed automatic transmission, providing smooth and efficient gear changes. This transmission was chosen for its ability to handle the engine’s substantial torque output and provide a comfortable driving experience, even when heavily loaded.
Driving Characteristics
The 6.0L V8 and 6-speed automatic combination in the Sierra 3500HD delivers a capable, if not overtly sporty, driving experience. The emphasis is on usability and power delivery for work-related tasks. Acceleration is adequate for a vehicle of this size and weight, but it’s the low-end torque that truly shines. The Hydra-Matic transmission is well-tuned for towing, holding gears appropriately and downshifting readily when needed. Compared to the available diesel options, this gasoline engine offers quicker acceleration but sacrifices fuel economy. Compared to the 6.2L V8, the 6.0L provides a more affordable entry point into the heavy-duty truck segment, albeit with slightly less overall power. The automatic transmission, while convenient, doesn’t offer the same level of control as a manual transmission, but it simplifies operation for drivers who prioritize ease of use.
Equipment & Trim Levels
The Crew Cab Long Box configuration of the Sierra 3500HD typically came standard with features like air conditioning, power windows and locks, a basic audio system, and cloth upholstery. The 2011-2013 facelift brought improvements to the interior materials and design. Optional extras included leather upholstery, a premium audio system, navigation, a rear-seat entertainment system, and various towing packages. The trim level dictated the level of standard equipment, with higher trims offering more luxurious features. This particular variant often served as a mid-range offering, providing a good balance of features and affordability.
Chassis & Braking
The Sierra 3500HD utilizes a robust chassis designed to withstand heavy loads. The front suspension features an independent torsion bar setup with double wishbones, providing a comfortable ride and good handling. The rear suspension employs a traditional rigid axle with leaf springs, optimized for load-carrying capacity. Braking duties are handled by ventilated discs on all four wheels, with ABS (Anti-lock Braking System) as standard. The rear brakes are slightly smaller in diameter than the front brakes. The heavy-duty nature of the truck necessitates a strong braking system to ensure safe stopping distances, even when towing.
Market Reception & Comparison
The 6.0L V8 Sierra 3500HD received generally positive reviews for its capability and reliability. Critics praised its strong towing capacity and comfortable ride. However, fuel economy was a common concern, especially compared to the diesel options. The diesel variants, while more expensive, offered significantly better fuel efficiency and even greater towing capacity. The 6.0L V8 was often seen as a good choice for buyers who didn’t require the ultimate in towing performance but still needed a capable heavy-duty truck. Its lower price point made it an attractive option for those on a budget.
Legacy
The GMT900-based Sierra 3500HD, including the 6.0L V8 variant, has proven to be a durable and reliable truck. The Vortec L96 engine is known for its longevity, and the Hydra-Matic transmission, while not without its potential issues, is generally considered robust. In the used car market, these trucks remain popular due to their affordability and capability. Regular maintenance is key to ensuring the long-term reliability of these vehicles, particularly regarding oil changes and transmission fluid services. The 6.0L V8 Sierra 3500HD continues to be a viable option for buyers seeking a capable and affordable heavy-duty truck.
