2015 GMC Sierra 1500

The 2015 GMC Sierra 1500 is a 2-door, 3-seat Regular Side, available in 30 trims, ranging from the Base 4x2 Regular Cab 6.5' Box to the Denali 4x4 Crew Cab 6.5' Box. Upon introduction, the $26,075 Base 4x2 Regular Cab 6.5' Box is equipped with a standard 4.3L, 6-cylinder, engine that achieves 18-mpg in the city and 24-mpg on the highway. an Automatic transmission is standard. The $51,765 Denali 4x4 Crew Cab 6.5' Box is equipped with a standard 5.3L, 8-cylinder, engine that achieves 16-mpg in the city and 22-mpg on the highway. an Automatic transmission is standard.