The 2020 GMC Canyon is available as a 4-door, 2-seat regular side. Starting at $22,200, the 2020 GMC Canyon SL 4x2 Extended Cab is powered by a 2.5LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 26-mpg on the highway. The top of the line 2020GMCCanyonAll Terrain w/Leather 4x4 Crew Cab Long Box , priced at $ 39,900 , is powered by a 3.6LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 24-mpg on the highway.