GMC Sierra 3500HD III (GMT900, facelift 2011) Crew Cab Standard Box 6.6 Duramax TD V8 (397 Hp) 4WD SRW Automatic
Overall Rating
GMC Sierra 3500HD:
The Chevrolet Silverado is a range of trucks manufactured by General Motors under the Chevrolet brand. Introduced for the 1999 model year, the Silverado is the successor to the long-running Chevrolet C/K model line. Taking its name from the top trim level from the Chevrolet C/K series, the Silverado is offered as a series of full-size pickup trucks, chassis cab trucks, and medium-duty trucks. The fourth generation of the model line was introduced for the 2019 model year.
The Chevrolet Silverado shares mechanical commonality with the identically related GMC Sierra; GMC ended the use of the C/K nomenclature a model generation prior to Chevrolet. In Mexico, high-trim level versions of the Silverado use the Chevrolet Cheyenne name. Competing against the Ford F-Series, Ram pickup, Toyota Tundra, and Nissan Titan, the Silverado is among the best-selling vehicles in the United States, having sold over 12 million trucks since its introduction in 1998 as a 1999 model year....(Read more on Wikipedia)
III (GMT900, facelift 2011) Crew Cab Standard Box Overview:
GMC Sierra 3500HD (III (GMT900, facelift 2011) Crew Cab Standard Box). With 1037 Nm of torque, it offers ample pulling power. At around 3345 kg, it’s on the heavier side. All‑wheel drive provides excellent grip, ideal for off‑road use. A vehicle with an open cargo bed at the back, suitable for transporting goods. Seating for 5 makes it ideal for daily use.
6.6 Duramax TD V8 (397 Hp) 4WD SRW Automatic Verdict:
Performance Verdict
Exceptional torque and horsepower make this Duramax diesel the top choice for extreme towing and heavy hauling, providing effortless capability.
Fuel Economy
While better than the gasoline V8 under heavy load, fuel efficiency is relative for a heavy-duty diesel, but it offers superior range and economy for its class.
Community Verdict
This rating is based on comments found on Reddit, scanned using artificial intelligence, and may not accurately reflect reality.

4.1 / 5
Based on AI analysis of 17 discussions
Read What Owners Say
Pros and Cons:
Pros:
- • Exceptional towing and hauling capabilities
- • Powerful and reliable engine options (especially Duramax)
- • Spacious and functional Crew Cab interior
- • Durable chassis and suspension for heavy loads
- • Strong resale value for well-maintained models
Cons:
- • Poor fuel economy, particularly with the gasoline V8
- • Large size can make maneuvering difficult in urban areas
- • Ride quality can be stiff when unladen
- • Interior materials are functional but not luxurious
- • High purchase price for top trims and diesel option
Specifications:
Specifications are compared to those of the previous generation(III (GMT900) Regular Cab Long Box: 2007 - 2010).
| General: | |
|---|---|
| Brand: | GMC |
| Model: | Sierra 3500HD |
| Generation: | III (GMT900, facelift 2011) Crew Cab Standard Box |
| Modification (Engine): | 6.6 Duramax TD V8 (397 Hp) 4WD SRW Automatic |
| Start of production: | 2011 |
| End of production: | 2013 |
| Powertrain Architecture: | Internal Combustion engine |
| Body type: | Pick-up |
| Seats: | 5 |
| Doors: | 4 |
| Engine: | |
|---|---|
| Engine systems: | Particulate filter |
| Power: | 397 Hp @ 3000 rpm. Same horsepower |
| Power per litre: | 60.2 Hp/l [387mm more] |
| Torque: | 1037 Nm @ 1600 rpm. |
| Engine Model/Code: | Duramax LML More details about the engine Duramax LML |
| Engine displacement: | 6599 |
| Number of cylinders: | 8 |
| Engine configuration: | V-engine |
| Number of valves per cylinder: | 4 |
| Fuel injection system: | Diesel Commonrail |
| Engine aspiration: | Turbocharger, Intercooler |
| Valvetrain: | OHV |
| Engine oil capacity: | 9.5 l |
| Coolant: | 24 l |
| Engine layout: | Front, Longitudinal |
| Cylinder Bore: | 103 mm mm |
| Piston Stroke: | 99 mm mm |
| Compression ratio: | 16:1 |
| Maximum engine speed: | 3000 rpm. |
| Performance: | |
|---|---|
| Fuel Type: | Diesel |
| Weight-to-power ratio: | 8.4 kg/Hp, 118.7 Hp/tonne |
| Weight-to-torque ratio: | 3.2 kg/Nm, 310 Nm/tonne |
| Space: | |
|---|---|
| Kerb Weight: | 3345 |
| Max. weight: | 5216 |
| Max load: | 1871 |
| Trunk (boot) space - maximum: | 1718 l |
| Permitted trailer load with brakes (12%): | 5897 kg |
| Fuel tank capacity: | 136 l |
| Size: | |
|---|---|
| Length: | 6101 mm mm [387mm more] |
| Width: | 2032 mm mm [404mm less] |
| Height: | 1966 mm mm [47mm more] |
| Wheelbase: | 3904 mm mm [526mm more] |
| Width including mirrors: | 2032 mm |
| Front track: | 1748 mm |
| Rear (Back) track: | 1709 mm |
| Ride height (ground clearance): | 213 mm |
| Minimum turning circle (turning diameter): | 15.4 m [above average] |
| Powertrain: | |
|---|---|
| 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 (4x4) |
| Number of gears | 6 |
| Transmission type | Automatic |
| Gearbox type | Allison |
| Front brakes | Ventilated discs, 355x40 mm [Best for performance and cooling.] |
| Rear brakes | Ventilated discs, 373x34 mm [Best for performance and cooling.] |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 235/80 R17; 265/70 R18 |
| Front suspension | Independent torsion bar, double wishbone |
| Rear suspension | Rigid axle suspension, Leaf spring |










Behind the wheel of the GMC Sierra 3500HD. How does it handle on the road?