2021 GMC Sierra 1500 SLE is a Truck (Double Cab) model with 8-speed shiftable automatic transmission. This is a four wheel drive model With a power of 310 HP and 348.00 ft lbs of torque. An urban consumption is 18.00 MPG. The engine has a capacity of 2.70L with I4 cylinders. To view detailed specifications like fuel consumption and dimensions, please scroll below.