The 2021 GMC Canyon is available as a 4-door, 4-seat regular side. Starting at $26,800, the 2021 GMC Canyon Standard 4x2 Extended Cab is powered by a 2.5LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 25-mpg on the highway. The top of the line 2021GMCCanyonDenali 4x4 Crew Cab Long Box w/4SD , priced at $ 45,000 , is powered by a 3.6LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway.