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Specs of GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) Automatic /2020, 2021, 2022, 2023/

Key specs

GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) Automatic /Pick-up 2020 - 2023/

What is the body type of GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed?
Pick-up, 4 Doors, 5 Seats
What is the power output of GMC Sierra 2500HD Pick-up 2020 6.6 Duramax TD V8 (445 Hp) Automatic?
445 Hp, 1234 Nm
910 lb.-ft.
What is the engine displacement of GMC Sierra 2500HD Pick-up 2020 6.6 Duramax TD V8 (445 Hp) Automatic?
6.6 l
6604 cm3
403 cu. in.
What is the number of cylinders in 2020 GMC 6.6 Duramax TD V8 (445 Hp) Automatic?
8, V-engine
What is the drivetrain of GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed Pick-up 2020 6.6 Duramax TD V8 (445 Hp) Automatic?
Rear wheel drive. Internal Combustion engine. The Internal combustion engine (ICE) drives the rear wheels of the vehicle.
What is the length of 2020 GMC Sierra 2500HD Pick-up?
6514 mm
256.46 in.
What is the width of 2020 GMC Sierra 2500HD Pick-up?
2079 mm
81.85 in.
What is the kerb weight of 2020 GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) Automatic?
3374 kg
7438 lbs.
What is the maximum permissible mass of 2020 GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) Automatic?
4944 kg
10900 lbs.
What are the number of gears and the gearbox type of 2020 GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) Automatic?
10, automatic transmission Allison
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General information

Brand
GMC
Model
Sierra 2500HD
Generation
Sierra 2500HD V (GMTT1XX) Double Cab Long Bed
Modification (Engine)
6.6 Duramax TD V8 (445 Hp) Automatic
Start of production
2020
End of production
2023
Powertrain Architecture
Internal Combustion engine
Body type
Pick-up
Seats
5
Doors
4
Looking for GMC Sierra 2500HD on the used-car market?
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Performance specs

Fuel Type
Diesel
Weight-to-power ratio
7.6 kg/Hp, 131.9 Hp/tonne
Weight-to-torque ratio
2.7 kg/Nm, 365.7 Nm/tonne

Engine specs

Power
445 Hp @ 2800 rpm.
Power per litre
67.4 Hp/l
Torque
1234 Nm @ 1600 rpm. 910 lb.-ft. @ 1600 rpm.
Engine layout
Front, Longitudinal
Engine Model/Code
Duramax L5P
Engine displacement
6604 cm3 403 cu. in.
Number of cylinders
8
Engine configuration
V-engine
Cylinder Bore
103 mm 4.06 in.
Piston Stroke
99 mm 3.9 in.
Compression ratio
16:1
Number of valves per cylinder
4
Fuel injection system
Diesel Commonrail
Engine aspiration
Turbocharger, Intercooler
Valvetrain
OHV
Engine oil capacity
9.5 l 10.04 US qt | 8.36 UK qt
Engine oil specification
Log in to see.Log in to see.
Coolant
29.1 l 30.75 US qt | 25.6 UK qt
Engine systems
Particulate filter

Volume and weights

Kerb Weight
3374 kg 7438 lbs.
Max. weight
4944 kg 10900 lbs.
Max load
1570 kg 3461 lbs.
Fuel tank capacity
136 l 35.93 US gal | 29.92 UK gal
Permitted trailer load with brakes (12%)
6577 kg 14500 lbs.

Dimensions

Length
6514 mm 256.46 in.
Width including mirrors
2079 mm 81.85 in.
Height
2027 mm 79.8 in.
Wheelbase
4127 mm 162.48 in.
Front track
1731 mm 68.15 in.
Rear (Back) track
1736 mm 68.35 in.
Ride height (ground clearance)
258 mm 10.16 in.

Drivetrain, brakes and suspension specs

Drivetrain Architecture
The Internal combustion engine (ICE) drives the rear wheels of the vehicle.
Drive wheel
Rear wheel drive
Number of gears and type of gearbox
10 gears, automatic transmission Allison
Front suspension
Coil spring, Double wishbone, Anti-roll bar
Rear suspension
Rigid axle suspension, Leaf spring
Front brakes
Ventilated discs, 350x40 mm
Rear brakes
Ventilated discs, 360x34 mm
Assisting systems
ABS (Anti-lock braking system)
Steering type
Recirculating-ball steering
Power steering
Hydraulic Steering
Tire size
265/70 R17; 245/75 R17; 265/70 R18; 265/60 R20
Wheel rim size
7.5J x 17; 8J x 18; 8.5J x 20