The GMC Sierra 3500HD III, specifically the Crew Cab Standard Box configuration with the 6.0-liter V8 engine and automatic transmission, 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 aimed to balance substantial towing and hauling capabilities with a degree of everyday usability. It occupied a middle ground within the 3500HD lineup, offering more power and capacity than the base models but stopping short of the diesel-powered options geared towards maximum work performance. This truck was primarily sold in the North American market, catering to owners needing a robust pickup for both commercial and personal use.
Technical Specifications
| Brand | GMC |
| Model | Sierra 3500HD |
| Generation | Sierra 3500HD III (GMT900, facelift 2011) Crew Cab Standard Box |
| Type (Engine) | 6.0 V8 (360 Hp) SRW 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 | 8 kg/Hp, 125.7 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 179.9 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 | 2863 kg, 6311.83 lbs. |
| Max. weight | 4762 kg, 10498.41 lbs. |
| Max load | 1899 kg, 4186.58 lbs. |
| Trunk (boot) space – maximum | 1718 l, 60.67 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 | 6101 mm, 240.2 in. |
| Width including mirrors | 2032 mm, 80 in. |
| Height | 1966 mm, 77.4 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) | 213 mm, 8.39 in. |
| Minimum turning circle (turning diameter) | 15.4 m, 50.52 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 | 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 variant lies the Vortec L96 engine, a 6.0-liter (364 cubic inch) V8. This engine is a member of the Vortec family, known for its robust construction and relatively simple design. The L96 utilizes a cast iron block and aluminum cylinder heads, contributing to its durability. It employs multi-port fuel injection, delivering fuel directly to each cylinder for efficient combustion. The overhead valve (OHV) valvetrain, while not as sophisticated as overhead cam designs, is known for its reliability and ease of maintenance. Variable valve timing (VVT) was incorporated to improve fuel economy and low-end torque. The engine is longitudinally mounted in the chassis, driving the rear wheels. Paired with the L96 is the Hydra-Matic 6L80E six-speed automatic transmission. This transmission offered smoother shifts and improved fuel efficiency compared to older four-speed automatics. The 6L80E is electronically controlled, adapting shift points based on driving conditions and throttle input.
Driving Characteristics
The 6.0-liter V8, producing 360 horsepower and 380 lb-ft of torque, provided ample power for everyday driving and moderate towing. However, it wasn’t as effortlessly powerful as the available Duramax diesel engine. Acceleration was respectable, but the truck’s substantial weight limited its quickness. The automatic transmission’s gear ratios were tuned for towing and hauling, prioritizing low-end grunt over outright speed. Compared to the manual transmission options, the automatic offered greater convenience, especially in stop-and-go traffic. However, some drivers preferred the more direct control and potentially slightly improved fuel economy of the manual. The truck’s ride quality, while improved over earlier generations, was still firm due to its heavy-duty suspension.
Equipment & Trim Levels
The Crew Cab Standard Box configuration offered a spacious interior with seating for five passengers. Standard features typically included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Higher trim levels, such as the SLT, added features like leather upholstery, heated seats, a premium audio system, and additional chrome exterior trim. Optional extras included a navigation system, a sunroof, and various towing packages. The interior design was functional and durable, prioritizing practicality over luxury.
Chassis & Braking
The Sierra 3500HD utilized a body-on-frame construction, providing a robust and durable platform. The front suspension featured an independent torsion bar setup with double wishbones, offering a comfortable ride and good handling. The rear suspension employed a traditional leaf spring design, optimized for carrying heavy loads. Brakes consisted of ventilated discs at all four wheels, providing adequate stopping power. Anti-lock braking system (ABS) was standard. The rear axle was a solid axle, contributing to the truck’s towing capacity. Stabilizer bars were included to reduce body roll during cornering.
Market Reception & Comparison
Critics generally praised the GMC Sierra 3500HD for its robust construction, towing capabilities, and comfortable interior. However, the 6.0-liter V8 was often seen as a compromise between power and fuel economy. The diesel engine offered significantly more torque and better fuel efficiency for heavy-duty work, but at a higher price point. Compared to its competitors, such as the Ford Super Duty and Ram 3500, the Sierra 3500HD offered a similar level of capability and refinement. Fuel economy was typical for a heavy-duty truck, averaging around 14-16 mpg in mixed driving. Reliability was generally good, with the Vortec L96 engine proving to be a durable and long-lasting powerplant.
Legacy
The GMC Sierra 3500HD III with the 6.0-liter V8 and automatic transmission remains a popular choice in the used truck market. Its combination of capability, comfort, and affordability makes it an attractive option for buyers needing a robust pickup for work or personal use. The Vortec L96 engine is known for its longevity and relatively low maintenance costs. While not as fuel-efficient as newer trucks, it offers a reliable and proven powertrain. These trucks are often sought after by those who need a heavy-duty truck without the higher cost and complexity of a diesel engine.
