GMC Sierra 3500HD V (GMTT1XX) Regular Cab Long Bed 6.6 V8 (401 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)
V (GMTT1XX) Regular Cab Long Bed Overview:
GMC Sierra 3500HD (V (GMTT1XX) Regular Cab Long Bed). With 629 Nm of torque, it offers ample pulling power. At around 2826 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 2 makes it ideal for daily use.
6.6 V8 (401 Hp) SRW Automatic Verdict:
Performance Verdict
Solid gasoline V8 performance suitable for substantial towing and daily work, offering a smoother power delivery than the diesel.
Fuel Economy
Lower fuel economy compared to the diesel, especially when towing, but generally more affordable upfront.
Community Verdict
This rating is based on comments found on Reddit, scanned using artificial intelligence, and may not accurately reflect reality.

2.9 / 5
Based on AI analysis of 22 discussions
Read What Owners Say
Pros and Cons:
Pros:
- • Exceptional towing and hauling capabilities, especially with the Duramax diesel.
- • Robust and durable construction designed for heavy-duty work.
- • Available 4WD and DRW configurations for maximum traction and stability.
- • Comfortable interior for a work truck, with modern tech options.
- • Powerful engine options (gasoline and diesel) to suit various needs.
Cons:
- • Large size can make urban maneuvering and parking challenging.
- • Fuel economy is inherently low, particularly for gasoline models under load.
- • Ride quality can be stiff when unloaded, typical for heavy-duty trucks.
- • Higher purchase price and operating costs compared to lighter-duty pickups.
Specifications:
Specifications are compared to those of the previous generation(IV (GMTK2XX) Crew Cab Long Box: 2017 - 2019).
| General: | |
|---|---|
| Brand: | GMC |
| Model: | Sierra 3500HD |
| Generation: | V (GMTT1XX) Regular Cab Long Bed |
| Modification (Engine): | 6.6 V8 (401 Hp) SRW Automatic |
| Start of production: | 2020 |
| End of production: | 2023 |
| Powertrain Architecture: | Internal Combustion engine |
| Body type: | Pick-up |
| Seats: | 2 |
| Doors: | 2 |
| Engine: | |
|---|---|
| Power: | 401 Hp @ 5200 rpm. Same horsepower |
| Torque: | 629 Nm @ 4000 rpm. |
| Engine Model/Code: | L8T More details about the engine L8T |
| Number of cylinders: | 8 |
| Engine configuration: | V-engine |
| Number of valves per cylinder: | 2 |
| Fuel injection system: | Direct injection |
| Engine aspiration: | Naturally aspirated engine |
| Valvetrain: | OHV, VVT |
| Engine oil capacity: | 7.6 l |
| Coolant: | 14.6 l |
| Engine layout: | Front, Longitudinal |
| Cylinder Bore: | 103.25 mm mm |
| Piston Stroke: | 98 mm mm |
| Compression ratio: | 10.8:1 |
| Performance: | |
|---|---|
| Fuel Type: | Petrol (Gasoline) |
| Weight-to-power ratio: | 7 kg/Hp, 141.9 Hp/tonne |
| Weight-to-torque ratio: | 4.5 kg/Nm, 222.6 Nm/tonne |
| Space: | |
|---|---|
| Kerb Weight: | 2826 |
| Max. weight: | 4876 |
| Max load: | 2050 |
| Permitted trailer load with brakes (12%): | 6577 kg |
| Fuel tank capacity: | 136 l |
| Size: | |
|---|---|
| Length: | 5982 mm mm [581mm less] |
| Width: | 2076 mm mm [31mm more] |
| Height: | 2056 mm mm [77mm more] |
| Wheelbase: | 3595 mm mm [664mm less] |
| Width including mirrors: | 2076 mm |
| Front track: | 1731 mm |
| Rear (Back) track: | 1736 mm |
| Ride height (ground clearance): | 285 mm |
| 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 | Hydra-Matic |
| Front brakes | Ventilated discs, 355x40 mm [Best for performance and cooling.] |
| Rear brakes | Ventilated discs, 360x34 mm [Best for performance and cooling.] |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | 235/80 R17; 265/70 R17; 245/75 R17; 275/70 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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