The GMC Sierra 3500HD III, specifically the facelifted model produced from 2011 to 2014, represented GMC’s heavy-duty pickup truck offering within the GMT900 platform generation. This variant, configured with a Regular Cab, Long Box, and powered by the 6.0-liter Vortec V8 engine paired with a six-speed automatic transmission, occupied a significant position in the American truck market, catering to buyers needing substantial towing and hauling capabilities. It served as a workhorse for commercial users and individuals requiring a robust pickup for demanding tasks. This configuration was positioned as a step up from the base 6.0L models, offering increased capability without the higher price point of the Duramax diesel options.
Technical Specifications
| Brand | GMC |
| Model | Sierra 3500HD |
| Generation | Sierra 3500HD III (GMT900, facelift 2011) Regular Cab Long Box |
| Type (Engine) | 6.0 V8 (360 Hp) SRW Automatic |
| Start of production | 2011 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 2 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.3 kg/Hp, 137.5 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 196.6 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 | 2619 kg (5773.91 lbs.) |
| Max. weight | 4717 kg (10399.2 lbs.) |
| Max load | 2098 kg (4625.3 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%) | 5897 kg (13000.66 lbs.) |
| Length | 5715 mm (225 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1966 mm (77.4 in.) |
| Wheelbase | 3369 mm (132.64 in.) |
| Front track | 1748 mm (68.82 in.) |
| Rear (Back) track | 1709 mm (67.28 in.) |
| Ride height (ground clearance) | 224 mm (8.82 in.) |
| Minimum turning circle (turning diameter) | 13.7 m (44.95 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
The heart of this Sierra 3500HD variant is the 6.0-liter Vortec L96 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, contributing to its durability. It utilizes a multi-port fuel injection system, delivering fuel directly to each cylinder for efficient combustion. The engine employs an overhead valve (OHV) valvetrain with variable valve timing (VVT) to optimize performance and fuel economy across a wider RPM range. The six-speed Hydra-Matic automatic transmission was the standard pairing for this engine. This transmission offered smooth shifting and adequate gear ratios for both towing and everyday driving. The transmission was designed to handle the substantial torque output of the 6.0L V8, making it a reliable choice for heavy-duty applications.
Driving Characteristics
The 6.0-liter V8 with the six-speed automatic provided a balance between power and usability. While not as quick as some of the lighter-duty pickups, the Sierra 3500HD offered ample torque for hauling heavy loads and towing trailers. The automatic transmission’s gear ratios were tuned for maximizing towing capacity, meaning that acceleration wasn’t its strong suit. However, it provided sufficient power for highway cruising and merging. Compared to the available Duramax diesel engine, this gasoline V8 offered a lower initial cost but sacrificed fuel economy and ultimate towing capacity. Compared to manual transmission equipped models, the automatic provided ease of use, particularly in stop-and-go traffic, but at the expense of some driver control and potentially slightly reduced fuel efficiency.
Equipment & Trim Levels
The Regular Cab, Long Box configuration typically came with a relatively basic level of equipment, focusing on functionality over luxury. Standard features generally included air conditioning, a basic audio system, vinyl upholstery, and manual windows and locks. Higher trim levels, such as the SLE and SLT, added features like power windows and locks, upgraded audio systems, cloth or leather upholstery, and additional convenience features. Optional extras included a trailer brake controller, a navigation system, and various appearance packages. The interior design was functional and durable, prioritizing practicality for work-oriented users.
Chassis & Braking
The Sierra 3500HD featured a heavy-duty chassis designed to withstand the stresses of hauling and towing. The front suspension utilized an independent torsion bar setup with double wishbones, providing a comfortable ride while maintaining stability. 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 for the truck’s weight. An Anti-lock Braking System (ABS) was standard, enhancing safety during emergency braking situations. The truck’s robust frame and suspension components contributed to its overall stability and durability.
Market Reception & Comparison
The 2011-2014 GMC Sierra 3500HD with the 6.0-liter V8 and automatic transmission received generally positive reviews. Critics praised its robust construction, ample towing capacity, and comfortable ride. However, fuel economy was a common criticism, as the gasoline V8 was significantly less fuel-efficient than the available Duramax diesel engine. Compared to the diesel models, the 6.0L V8 offered a lower purchase price and simpler maintenance requirements. It appealed to buyers who didn’t require the ultimate towing capacity of the diesel but still needed a capable heavy-duty truck. Reliability was generally good, with the Vortec V8 engine proving to be a durable and dependable 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. The Vortec L96 engine is known for its longevity and relatively low maintenance costs. While fuel economy isn’t its strong suit, its affordability and capability make it an attractive option for buyers seeking a reliable and capable heavy-duty pickup. These trucks are often found in use by contractors, farmers, and individuals who require a robust vehicle for demanding tasks. The combination of a proven engine, durable transmission, and heavy-duty chassis ensures that these Sierra 3500HDs continue to provide years of reliable service.
