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Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic

General information
Photo of 2015 - 2017 Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic Pick-up (397 Hp) - technical specs and dimensions
Power 397 Hp @ 3000 rpm.
Torque 1037 Nm @ 1600 rpm.
Brand
GMC
Model
Sierra 2500HD
Generation
Sierra 2500HD IV (GMTK2XX) Crew Cab Standard Box
Modification (Engine)
6.6 Duramax TD V8 (397 Hp) Automatic
Start of production
2015 year
End of production
2017 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 2500HD Review

The Gmc Sierra 2500HD Sierra 2500HD IV (GMTK2XX) Double Cab Long Box (6.6 Duramax TD V8 (397 Hp) 4WD Automatic) is a Pick-up vehicle that entered production in 2015. Under the hood, it features a 6599 cm3 engine that pushes out 397 Hp @ 3000 rpm.. Technically, the vehicle features a Front, Longitudinal engine placement and is equipped with a 8-cylinder block. It produces a maximum torque of 1037 Nm @ 1600 rpm..

Known for its technical specifications and performance, the Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic (2015 - 2017) remains a popular choice for many drivers. This version boasts a robust powertrain under the hood, producing a total of 397 Hp @ 3000 rpm.. It demonstrates a steady character and inspires confidence through its handling. Whether for performance or efficiency, this model remains a successful example in today's market.
📊 Model Comparison AnalysisThis model delivers **+96 Hp** more power compared to its sibling 6.0 V8 (301 Hp) 4WD Automatic CNG. This model delivers **+37 Hp** more power compared to its sibling 6.0 V8 (301 Hp) Automatic CNG.
FAQ
How many horsepower does Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic have? +
The Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic model is equipped with an engine producing 397 Hp @ 3000 rpm. total horsepower.
What drivetrain does the Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic have? +
This model transfers power to the road via a Rear wheel drive drivetrain.
Is the Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic a good car? +
Considering the technical specs and market position, the Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic is a highly competitive and desirable model in its class.
Is Gmc 6.6 Duramax TD V8 (397 Hp) 4WD Automatic reliable? +
The Gmc 6.6 Duramax TD V8 (397 Hp) 4WD 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
8.1 kg/Hp, 123.2 Hp/tonne
Weight-to-torque ratio
3.1 kg/Nm, 321.8 Nm/tonne
Engine specs
Power
397 Hp @ 3000 rpm.
Power per litre
60.2 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
1037 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 LML
Engine displacement
6599 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
22.4 l
Engine systems
Particulate filter
Space, Volume and weights
Kerb Weight
3222 kg
Curb weight is a key parameter affecting fuel consumption, handling agility, acceleration times, and stopping distances.
Max. weight
4536 kg
Curb weight is a key parameter affecting fuel consumption, handling agility, acceleration times, and stopping distances.
Max. load
1314 kg
Trunk (boot) space - maximum
1728 l
Fuel tank capacity
136 l
Permitted trailer load with brakes (12%)
5897 kg
Dimensions
Length
6083 mm
Width including mirrors
2045 mm
Height
1988 mm
Wheelbase
3904 mm
Front track
1748 mm
Rear / Back Track
1709 mm
Ride height (ground clearance)
213 mm
Minimum turning circle (turning diameter)
15.7 m
Drivetrain, brakes and suspension specs
Drivetrain Architecture
The Internal combustion engine (ICE) drives the rear wheels of the vehicle.
Drivetrain type specifies which wheels receive power from the engine. This affects road grip, cornering, and stability on slippery surfaces.
Drive wheel
Rear wheel drive
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
6 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
Cone worm with recirculation balls
Tires size
245/75 R17; 265/70 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
P0212 🔴 High
Injector Circuit Malfunction - Cylinder 12
Diagnostic Guide
P0294 🔴 High
Cylinder 12 Injector Circuit Low
Diagnostic Guide
P0307 🔴 High
Cylinder 7 Misfire Detected
Diagnostic Guide
P0308 🔴 High
Cylinder 8 Misfire Detected
Diagnostic Guide
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User Reviews
N
Noah V.
19 days ago
★★★★★
Finally got the keys today. Very responsive throttle, makes highway overtaking a breeze. Comfort is top-notch, great seats. If you are thinking about buying one, go test drive it.
J
James S.
14 months ago
★★★★★
Been driving it for 3 months now. The 397 Hp @ 3000 rpm. hp feels more than enough for daily driving. Suspension handles bumps and rough roads very smoothly. If you are thinking about buying one, go test drive it.
O
Oliver 84
25 months ago
★★★★☆
Finally got the keys today. Very responsive throttle, makes highway overtaking a breeze. Sound insulation is great, very quiet cabin at high speeds. Value for money is unmatched, highly recommended.
A
Arthur K.
6 weeks ago
★★★★★
Switched from a different brand. Engine performance exceeded my expectations. The exterior design looks sharp and modern in person. I highly recommend it, won't disappoint.
J
James 95
26 days ago
★★★★★
Ordered it immediately after a quick test drive. Engine performance exceeded my expectations. The handling in corners is very safe. Definitely a solid choice in this price range.
J
James V.
7 days ago
★★★★☆
Does anyone experience any rattles or squeaks over time?
N
Noah 77
19 months ago
★★★★☆
Mainly using it for my daily commute to work. N/A economy is better than I expected. Sound insulation is great, very quiet cabin at high speeds. Definitely a solid choice in this price range.

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