Home >> Car catalog >> GMC >> Sierra 2500HD >> Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed >> 6.6 Duramax TD V8 (445 Hp) 4WD Automatic
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Specs of GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic /2020, 2021, 2022, 2023/

2020 GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed - Photo 1
GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed - Photo 2

Key specs

GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic /Pick-up 2020 - 2023/

What is the body type of GMC Sierra 2500HD V (GMTT1XX) Crew 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) 4WD 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) 4WD 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) 4WD Automatic?
8, V-engine
What is the drivetrain of GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed Pick-up 2020 6.6 Duramax TD V8 (445 Hp) 4WD Automatic?
All wheel drive (4x4). Internal Combustion engine. 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.
What is the length of 2020 GMC Sierra 2500HD Pick-up?
6759 mm
266.1 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) Crew Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic?
3577 kg
7886 lbs.
What is the maximum permissible mass of 2020 GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic?
5158 kg
11371 lbs.
What are the number of gears and the gearbox type of 2020 GMC Sierra 2500HD V (GMTT1XX) Crew Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic?
10, automatic transmission Allison
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General information

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

Fuel Type
Diesel
Weight-to-power ratio
8 kg/Hp, 124.4 Hp/tonne
Weight-to-torque ratio
2.9 kg/Nm, 345 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
3577 kg 7886 lbs.
Max. weight
5158 kg 11371 lbs.
Max load
1581 kg 3486 lbs.
Fuel tank capacity
136 l 35.93 US gal | 29.92 UK gal
Permitted trailer load with brakes (12%)
8392 kg 18501 lbs.

Dimensions

Length
6759 mm 266.1 in.
Width including mirrors
2079 mm 81.85 in.
Height
2023 mm 79.65 in.
Wheelbase
4369 mm 172.01 in.
Front track
1731 mm 68.15 in.
Rear (Back) track
1736 mm 68.35 in.
Ride height (ground clearance)
256 mm 10.08 in.

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.
Drive wheel
All wheel drive (4x4)
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