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Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic

General information
Photo of 2020 - 2023 Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic Pick-up (445 Hp) - technical specs and dimensions
Power 445 Hp @ 2800 rpm.
Torque 1234 Nm @ 1600 rpm.
Brand
GMC
Model
Sierra 3500HD
Generation
Sierra 3500HD V (GMTT1XX) Crew Cab Long Bed
Modification (Engine)
6.6 Duramax TD V8 (445 Hp) 4WD SRW Automatic
Start of production
2020 year
End of production
2023 year
Powertrain Architecture
Internal Combustion engine
Powertrain architecture classifies the propulsion technology of the vehicle, such as internal combustion, electric (BEV), or hybrid.
Body type
Pick-up
Body type refers to the structural design and shape of the vehicle (such as Sedan, Hatchback, SUV, or Coupe).
Seats
5
Seat count specifies the maximum passenger capacity the vehicle is legally approved to transport at once.
Doors
4
Door count indicates the total number of entry points for passengers and cargo access (e.g., 3-door, 5-door).

Gmc Sierra 3500HD Review

Introduced in 2020, the Gmc Sierra 3500HD (generation Sierra 3500HD V (GMTT1XX) Crew Cab Standard Bed) is a classic Pick-up offering the 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic specification. Its propulsion comes from a 6604 cm3 setup, generating a respectable 445 Hp @ 2800 rpm.. Featuring Turbocharger, Intercooler aspiration, it produces a peak torque of 1234 Nm @ 1600 rpm. for robust performance. The specific output is rated at 67.4 Hp/l per litre.

The Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic stands out as a prominent 2020 - 2023 model that has gained significant attention in the automotive world. At its core, the vehicle features a performance-oriented engine delivering 445 Hp @ 2800 rpm. of power. Compared to its competitors, it stands out in ergonomics and dynamics. With its timeless design, this version maintains a popular profile according to CarWiki.
FAQ
How many horsepower does Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic have? +
The Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic model is equipped with an engine producing 445 Hp @ 2800 rpm. total horsepower.
What drivetrain does the Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic have? +
This model transfers power to the road via a All wheel drive (4x4) drivetrain.
Is the Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic a good car? +
Considering the technical specs and market position, the Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic is a highly competitive and desirable model in its class.
Is Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic reliable? +
The Gmc 6.6 Duramax TD V8 (445 Hp) 4WD DRW Automatic is built with high engineering standards and is generally considered a reliable vehicle with proper maintenance.
Performance specs
Fuel Type
Diesel
Fuel type defines the primary source of energy required by the vehicle’s engine (petrol, diesel, electricity, hybrid, LPG, etc.).
Weight-to-power ratio
8.3 kg/Hp, 120.6 Hp/tonne
Weight-to-torque ratio
3 kg/Nm, 334.4 Nm/tonne
Engine specs
Power
445 Hp @ 2800 rpm.
Power per litre
67.4 Hp/l
Power per litre (specific power) measures the engine power relative to its displacement. A higher value indicates advanced efficiency and engineering quality.
Torque
1234 Nm @ 1600 rpm.
Torque represents the engine’s rotational force, which determines pulling power. High torque ensures responsive acceleration and stronger uphill performance.
Engine layout
Front, Longitudinal
Engine layout defines the position and alignment of the engine block. This layout affects the car’s weight distribution, handling, and interior cabin space.
Engine Model Code
Duramax L5P
Engine displacement
6604 cm3
Engine displacement represents the combined volume of all cylinders. It is a direct indicator of engine size and baseline performance potential.
Number of cylinders
8
Cylinder count represents the number of combustion chambers. More cylinders generally result in smoother operation and a refined engine note.
Engine configuration
V-engine
Cylinder bore
103 mm
Piston stroke
99 mm
Compression ratio
16:1
Number of valves per cylinder
4
Valves per cylinder control the airflow into and exhaust out of the engine. More valves improve high-RPM breathing and performance.
Fuel injection system
Diesel Commonrail
Engine aspiration
Turbocharger, Intercooler
Aspiration describes how the engine draws air into its cylinders, distinguishing naturally aspirated setups from turbochargers or superchargers.
Valvetrain
OHV
Engine oil capacity
9.5 l
Coolant
29.1 l
Engine systems
Particulate filter
Space, Volume and weights
Kerb Weight
3690 kg
Curb weight is a key parameter affecting fuel consumption, handling agility, acceleration times, and stopping distances.
Max. weight
5557 kg
Curb weight is a key parameter affecting fuel consumption, handling agility, acceleration times, and stopping distances.
Max. load
1867 kg
Fuel tank capacity
136 l
Permitted trailer load with brakes (12%)
9072 kg
Dimensions
Length
6759 mm
Width including mirrors
2079 mm
Height
2049 mm
Wheelbase
4369 mm
Front track
1731 mm
Rear / Back Track
1736 mm
Ride height (ground clearance)
283 mm
Drivetrain, brakes and suspension specs
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.
Drivetrain type specifies which wheels receive power from the engine. This affects road grip, cornering, and stability on slippery surfaces.
Drive wheel
All wheel drive (4x4)
Drivetrain type specifies which wheels receive power from the engine. This affects road grip, cornering, and stability on slippery surfaces.
Number of gears and type of gearbox
10 gears, automatic transmission Allison
Front suspension
Coil spring, Double wishbone, Transverse stabilizer
The suspension system absorbs road bumps, providing cabin comfort and keeping tires firmly planted on the road surface.
Rear suspension
Rigid axle suspension, Leaf spring
The suspension system absorbs road bumps, providing cabin comfort and keeping tires firmly planted on the road surface.
Front brakes
Ventilated discs, 350x40 mm
The brake system is a vital safety component that uses friction to slow down or bring the vehicle to a complete stop.
Rear brakes
Ventilated discs, 360x34 mm
The brake system is a vital safety component that uses friction to slow down or bring the vehicle to a complete stop.
Assisting systems
ABS (Anti-lock braking system)
Steering type
Steering rack and pinion
Power steering
Electric Steering
Tires size
265/70 R17; 245/75 R17; 265/70 R18; 265/60 R20
Tire size specifies the tread width, aspect ratio, and rim diameter, affecting the balance between handling grip and ride comfort.
Wheel rims size
7.5J x 17; 8J x 18; 8.5J x 20
Common OBD2 Fault Codes
P1122 🔴 High
Manufacturer Specific Engine Fault Code P1122
Diagnostic Guide
P1124 🔴 High
Manufacturer Specific Engine Fault Code P1124
Diagnostic Guide
P1126 🔴 High
Manufacturer Specific Engine Fault Code P1126
Diagnostic Guide
P1128 🔴 High
Manufacturer Specific Engine Fault Code P1128
Diagnostic Guide
Similar Models
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Gmc Sierra 3500HD 6.6 V8 (401 Hp) 4WD DRW Automatic
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User Reviews
G
George 95
28 months ago
★★★★★
Decided on this after deep research. N/A efficiency is surprisingly good for this class. Sound insulation is great, very quiet cabin at high speeds. If you're undecided, just go for it.
C
Charlie Z.
8 months ago
★★★★★
Just picked mine up last week! Engine performance exceeded my expectations. The infotainment is fast and lag-free. Planning to keep it for a long time.
N
Noah M.
8 weeks ago
★★★★★
Perfect size and choice for our small family. Very responsive throttle, makes highway overtaking a breeze. Interior quality is premium for this class. If you're undecided, just go for it.
H
Henry T.
9 days ago
★★★★★
Ordered it immediately after a quick test drive. N/A efficiency is surprisingly good for this class. Suspension handles bumps and rough roads very smoothly. Value for money is unmatched, highly recommended.
J
Jack Z.
20 weeks ago
★★★★★
Been driving it for 3 months now. The 445 Hp @ 2800 rpm. hp feels powerful on the road. Spacious interior and practical cargo capacity. Planning to keep it for a long time.
L
Leo K.
8 days ago
★★★★☆
Bought a used model in great condition last year. N/A efficiency is surprisingly good for this class. The exterior design looks sharp and modern in person. Definitely a solid choice in this price range.
T
Thomas A.
4 weeks ago
★★★★☆
Finally got the keys today. N/A economy is better than I expected. The exterior design looks sharp and modern in person. Definitely a solid choice in this price range.

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