The 2010 GMC Canyon is available as a 2-door, 3-seat regular side. Starting at $21,735, the 2010 GMC Canyon SLE1 4x4 Regular Cab is powered by a 2.9L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway. The top of the line 2010GMCCanyonWork Truck 4x2 Extended Cab , priced at $ 19,230 , is powered by a 2.9L , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway.