The 2011 Chevrolet Colorado is available as a 2-door, 3-seat regular side. Starting at $18,270, the 2011 Chevrolet Colorado LT 4x2 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 25-mpg on the highway. The top of the line 2011ChevroletColorado2LT 4x4 Crew Cab , priced at $ 29,075 , is powered by a 3.7L , 5 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 21-mpg on the highway.