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GMC Sierra 3500HD III (GMT900, facelift 2011) Extended Cab Long Box 6.6 Duramax TD V8 (397 Hp) 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) Extended Cab Long Box Overview:
GMC Sierra 3500HD (III (GMT900, facelift 2011) Extended Cab Long Box). With 1037 Nm of torque, it offers ample pulling power. At around 3057 kg, it’s on the heavier side. Rear‑wheel drive offers dynamic handling and sporty feedback. 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) SRW Automatic Verdict:
Performance Verdict
Delivers outstanding power and torque from the Duramax diesel, making it highly capable for heavy towing and hauling. The SRW setup offers a balance of capacity and everyday usability.
Fuel Economy
Offers good fuel efficiency for a heavy-duty truck, especially under load, making it a strong choice for those needing diesel power without the full DRW footprint.
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, especially with the Duramax diesel.
- • Robust and reliable engine options suitable for demanding work.
- • Durable construction designed for heavy-duty commercial and personal use.
- • Available in various configurations (SRW/DRW, 2WD/4WD) to suit specific needs.
- • Relatively comfortable interior for a heavy-duty work truck.
Cons:
- • Poor fuel economy, particularly with the gasoline V8 and under heavy loads.
- • Large size and long wheelbase can make maneuvering in tight spaces challenging.
- • Ride quality can be stiff and bouncy when the truck is unloaded.
- • Higher purchase price and maintenance costs for the Duramax diesel engine.
- • Limited luxury features compared to lighter-duty trucks or SUVs.
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) Extended Cab Long Box |
| Modification (Engine): | 6.6 Duramax TD V8 (397 Hp) SRW Automatic |
| Start of production: | 2011 |
| End of production: | 2013 |
| Powertrain Architecture: | Internal Combustion engine |
| Body type: | Pick-up |
| Seats: | 5 |
| Doors: | 2 |
| Engine: | |
|---|---|
| Engine systems: | Particulate filter |
| Power: | 397 Hp @ 3000 rpm. Same horsepower |
| Power per litre: | 60.2 Hp/l [623mm 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: | 7.7 kg/Hp, 129.9 Hp/tonne |
| Weight-to-torque ratio: | 2.9 kg/Nm, 339.2 Nm/tonne |
| Space: | |
|---|---|
| Kerb Weight: | 3057 |
| Max. weight: | 5080 |
| Max load: | 2023 |
| Trunk (boot) space - maximum: | 2138 l |
| Permitted trailer load with brakes (12%): | 5897 kg |
| Fuel tank capacity: | 136 l |
| Size: | |
|---|---|
| Length: | 6337 mm mm [623mm more] |
| Width: | 2436 mm mm [Same width.] |
| Height: | 1966 mm mm [47mm more] |
| Wheelbase: | 4018 mm mm [640mm more] |
| Width including mirrors: | 2436 mm |
| Front track: | 1748 mm |
| Rear (Back) track: | 1709 mm |
| Ride height (ground clearance): | 221 mm |
| Minimum turning circle (turning diameter): | 15.8 m [above average] |
| Powertrain: | |
|---|---|
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| 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 |
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