GMC Sierra 3500HD IV (GMTK2XX) Double Cab Long Box 6.6 Duramax TD V8 (445 Hp) DRW 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)
IV (GMTK2XX) Double Cab Long Box Overview:
GMC Sierra 3500HD (IV (GMTK2XX) Double Cab Long Box). With 1234 Nm of torque, it offers ample pulling power. At around 3446 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 (445 Hp) DRW Automatic Verdict:
Performance Verdict
Delivers immense power and torque for dual-rear-wheel applications, making it a powerhouse for the heaviest towing and hauling tasks.
Fuel Economy
Provides excellent fuel efficiency for a heavy-duty truck of this capability, offering a strong balance of power and operational cost for heavy users.
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 18 discussions
Read What Owners Say
Pros and Cons:
Pros:
- • Exceptional towing and hauling capabilities, especially with Duramax diesel.
- • Robust and reliable engine options for demanding work.
- • Comfortable and well-appointed interior for a heavy-duty truck.
- • Strong resale value for Duramax models.
- • Available in various configurations (SRW/DRW, 2WD/4WD) to suit diverse needs.
Cons:
- • Gasoline V8 models have poor fuel economy, particularly under load.
- • Large size can make maneuvering in urban environments challenging.
- • Ride quality can be stiff when unladen, typical for heavy-duty trucks.
- • High purchase price and maintenance costs, especially for diesel variants.
- • Limited advanced safety features compared to modern passenger vehicles.
Specifications:
Specifications are compared to those of the previous generation(IV (GMTK2XX) Crew Cab Long Box: 2015 - 2019).
| General: | |
|---|---|
| Brand: | GMC |
| Model: | Sierra 3500HD |
| Generation: | IV (GMTK2XX) Double Cab Long Box |
| Modification (Engine): | 6.6 Duramax TD V8 (445 Hp) DRW Automatic |
| Start of production: | 2017 |
| End of production: | 2019 |
| Powertrain Architecture: | Internal Combustion engine |
| Body type: | Pick-up |
| Seats: | 5 |
| Doors: | 4 |
| Engine: | |
|---|---|
| Engine systems: | Particulate filter |
| Power: | 445 Hp @ 2800 rpm. Same horsepower |
| Power per litre: | 67.4 Hp/l [242mm less] |
| Torque: | 1234 Nm @ 1600 rpm. |
| Engine Model/Code: | Duramax L5P More details about the engine Duramax L5P |
| Engine displacement: | 6604 |
| 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: | 29.7 l |
| Engine layout: | Front, Longitudinal |
| Cylinder Bore: | 103 mm mm |
| Piston Stroke: | 99 mm mm |
| Compression ratio: | 16:1 |
| Performance: | |
|---|---|
| Fuel Type: | Diesel |
| Weight-to-power ratio: | 7.7 kg/Hp, 129.1 Hp/tonne |
| Weight-to-torque ratio: | 2.8 kg/Nm, 358.1 Nm/tonne |
| Space: | |
|---|---|
| Kerb Weight: | 3446 |
| Max. weight: | 5908 |
| Max load: | 2462 |
| Trunk (boot) space - maximum: | 2162 l |
| Permitted trailer load with brakes (12%): | 9072 kg |
| Fuel tank capacity: | 136 l |
| Size: | |
|---|---|
| Length: | 6321 mm mm [242mm less] |
| Width: | 2438 mm mm [Same width.] |
| Height: | 1972 mm mm [3mm less] |
| Wheelbase: | 4017 mm mm [242mm less] |
| Width including mirrors: | 2438 mm |
| Front track: | 1748 mm |
| Rear (Back) track: | 1906 mm |
| Minimum turning circle (turning diameter): | 16.1 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, 355x40 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 |
| Wheel rims size | 7.5J x 17; 8J x 18 |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Rigid axle suspension, Leaf spring |










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