GMC
GMC SierraHD T1XX (2020–2023) Specs
Specifications, engines, dimensions and technical data.
Gen 5
2020 - 2023
T1XX
Pick Up
W
L
H
WB
GC
Boot
Engine
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Power
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Fuel
—
Gears
—
Platform
—
Body Style
Chassis
Engines
Quick Specs
Fuel
Fuel
Combined
Combined
Engine Lineup
| Trans | Engine | Gears | HP | Fuel | CO₂ |
|---|---|---|---|---|---|
| AT | 6.6 TD V8 4WD DRW Automatic | 10 | 470 HP | Diesel | — |
| AT | 6.6 V8 SRW Automatic | 10 | 401 HP | Petrol | — |
Note: Performance figures may vary based on market and conditions.
GMC SierraHD T1XX overview
The GMC SierraHD (T1XX) is the 5th generation of the SierraHD, built from 2020 to 2023. It is offered as a Pick Up with 2 engines (petrol, diesel), from 401 HP to 445 HP. The 6.6 V8 (401 Hp) 4WD DRW Automatic is 5982 mm long.
How much horsepower does the GMC SierraHD have?
The GMC SierraHD (T1XX) has 401 HP to 445 HP, depending on the engine: 6.6 Smallblock (401 HP), 6.6 Duramax (445 HP).
What engines are available for the GMC SierraHD?
The GMC SierraHD is available with 2 engines: 6.6 Smallblock (401 HP, petrol), 6.6 Duramax (445 HP, diesel).
What are the dimensions of the GMC SierraHD?
The GMC SierraHD is 5982 mm long, 2038 mm tall, with a 3595 mm wheelbase.
Advanced Specs
Overview
| Generation | GMC Sierra HD V GMTT1XX Regular Cab Long Bed |
|---|---|
| Year | 2020–2023 |
| Platform | GM GMT Platform / GMTT1XX |
| Variant | 6.6 V8 (401 Hp) 4WD DRW Automatic |
| Body type | Pick Up |
| Engine type | Fuel |
| Fuel type | Petrol |
| Seats | 2 |
| Doors | 2 |
Power & torque
| Power | 401 HP |
|---|---|
| Power @ max rpm | 5200 rpm |
| Torque | 629 Nm |
| Torque @ max rpm | 4000 rpm |
Engine
| Engine code | L8T |
|---|---|
| Cylinders | 8 |
| Configuration | V Engine |
| Bore | 103.3 mm |
| Stroke | 98.0 mm |
| Compression ratio | 10.8 |
| Valves per cylinder | 2 |
| Injection system | Direct Injection |
| Aspiration | Naturally Aspirated Engine |
| Valvetrain | Ohv Vvt |
| Oil capacity | 7.6 L |
| Coolant | 15.1 L |
| Engine layout | Front Longitudinal |
Drivetrain & transmission
| Drive | All wheel drive (4x4) |
|---|---|
| Powertrain architecture | Internal Combustion Engine |
| 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 |
| Gearbox type | Torque Converter |
| Gears | 6 |
| Gearbox code | 6l90 |
| Gearbox manufacturer | gm |
Dimensions
| Length | 5982 mm |
|---|---|
| Height | 2038 mm |
| Wheelbase | 3595 mm |
| Front track | 1731 mm |
| Rear track | 1905 mm |
| Ground clearance | 266 mm |
Mass
| Kerb weight | 3092 kg |
|---|---|
| Max weight | 6350 kg |
| Max load | 3258 kg |
Consumption & emissions
| Fuel tank | 136.0 L |
|---|
Chassis & brakes
| Front suspension | Coil Spring Double Wishbone Transverse Stabilizer |
|---|---|
| Rear suspension | Rigid Axle Suspension Leaf Spring |
| Front brakes | Ventilated discs, 355x40 mm |
| Rear brakes | Ventilated discs, 355x40 mm |
| Steering type | Cone Worm With Recirculation Balls |
| Power steering | Hydraulic Steering |
| Tire size | 265/70 R17; 245/75 R17; 275/70 R18 |
| Wheel rims | 7.5J x 17; 8J x 18 |
| Assisting systems | Abs Anti Lock Braking System |
Efficiency ratios
| Weight-to-power | 7.7 kg/Hp, 129.7 Hp/tonne |
|---|---|
| Weight-to-torque | 4.9 kg/Nm, 203.4 Nm/tonne |
Other
| Start Of Production | 2020 |
|---|---|
| End Of Production | 2023 |
| Width Including Mirrors | 2457 |
Performance
Engine speed (1k/rpm)
! Figures from catalog data; real-world values may differ.
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