The 2016 GMC Canyon is a 4-door, 4-seat Regular Side, available in 17 trims, ranging from the Base 4x2 Extended Cab to the SLT 4x4 Crew Cab Long Box. Upon introduction, the $23,310 Base 4x2 Extended Cab is equipped with a standard 2.5L, 4-cylinder, engine that achieves 19-mpg in the city and 26-mpg on the highway. a Manual transmission is standard. The $38,110 SLT 4x4 Crew Cab Long Box is equipped with a standard 3.6L, 6-cylinder, engine that achieves 17-mpg in the city and 24-mpg on the highway. an Automatic transmission is standard.