2021 GMC Sierra 1500 Crew Cab AT4 Seating Capacity Specs
Seating Capacity Specs
| Seating Capacity | 5 passengers |
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| Doors | 4 |
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All Available Specs
Basics
| Year | 2021 |
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| Make | GMC |
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| Model | Sierra 1500 |
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| Trim | Crew Cab AT4 |
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| Vehicle Type | Truck |
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Seating & Access
Powertrain
| Engine | DURAMAX |
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| Engine Configuration | I6 |
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| Engine Size (L) | 3.0 L |
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| Engine Size (cu in) | 183 cu in |
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| Fuel Type | Diesel |
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| Engine Induction | Turbo |
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| Drivetrain | 4WD |
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Power & Performance
| Horsepower | 277 HP |
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| Horsepower RPM | 3,750 rpm |
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| Torque | 460 ft-lbs |
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| Torque RPM | 1,500 rpm |
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| HP/Liter | 92 HP/L |
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| HP/Cubic Inch | 1.5 HP/cu in |
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Fuel Efficiency
| City MPG | 22 mpg |
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| City L/100km | 11.0 L/100km |
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| Highway MPG | 26 mpg |
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| Highway L/100km | 9.0 L/100km |
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| Combined MPG | 24 mpg |
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| Combined L/100km | 10.0 L/100km |
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Fuel Tank & Range
| Gas Tank Size (gal) | 24.0 gal |
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| Gas Tank Size (L) | 90.8 L |
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| City Range (miles) | 528 miles |
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| City Range (km) | 850 km |
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| Highway Range (miles) | 624 miles |
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| Highway Range (km) | 1,004 km |
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| Combined Range (miles) | 576 miles |
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| Combined Range (km) | 927 km |
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Tires
| Front Tire Size | 265/65R18SL |
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| Front Tire Width | 265 |
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| Front Tire Aspect Ratio | 65 |
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| Front Rim Size | 18 |
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| Front Tire Load Capacity | SL |
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| Rear Tire Size | 265/65R18SL |
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| Rear Tire Width | 265 |
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| Rear Tire Aspect Ratio | 65 |
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| Rear Rim Size | 18 |
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| Rear Tire Load Capacity | SL |
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| Spare Tire Size | 265/70R17SL |
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Wheels
| Front Wheel Size | 18 x 8.5 |
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| Rear Wheel Size | 18 x 8.5 |
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| Front Wheel Material | Aluminum |
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| Rear Wheel Material | Aluminum |
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Legroom
| First Row Legroom (in) | 44 in. |
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| First Row Legroom (cm) | 111 cm |
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| Second Row Legroom (in) | 43 in. |
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| Second Row Legroom (cm) | 109 cm |
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Headroom
| First Row Headroom (in) | 43 in. |
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| First Row Headroom (cm) | 109 cm |
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| Second Row Headroom (in) | 40 in. |
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| Second Row Headroom (cm) | 101 cm |
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Turning Measurements
| Turning Diameter C2C (ft) | 46.3 ft |
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| Turning Diameter C2C (m) | 14.1 m |
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| Turning Radius C2C (ft) | 23.1 ft |
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| Turning Radius C2C (m) | 7.0 m |
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Ground Clearance
| Front Ground Clearance (in) | 10.9 in. |
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| Front Ground Clearance (cm) | 27.7 cm |
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| Rear Ground Clearance (in) | 10.9 in. |
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| Rear Ground Clearance (cm) | 27.7 cm |
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| Min Ground Clearance (in) | 10.9 in. |
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| Min Ground Clearance (cm) | 27.7 cm |
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| Max Ground Clearance (in) | 10.9 in. |
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| Max Ground Clearance (cm) | 27.7 cm |
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Height & Length
| Height (in) | 78 in. |
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| Height (cm) | 198 cm |
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| Height (ft) | 6.5 ft |
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| Height (m) | 2.0 m |
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| Length (in) | 231 in. |
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| Length (cm) | 586 cm |
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| Length (ft) | 19.3 ft |
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| Length (m) | 5.9 m |
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Width & Track
| Width w/o Mirrors (in) | 81.2 in. |
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| Width w/o Mirrors (cm) | 206 cm |
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| Width w/o Mirrors (ft) | 6.8 ft |
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| Width w/o Mirrors (m) | 2.1 m |
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Wheelbase
| Wheelbase (in) | 147 in. |
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| Wheelbase (cm) | 373 cm |
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| Wheelbase (ft) | 12.3 ft |
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| Wheelbase (m) | 3.7 m |
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