The 2010 Chevrolet HHR is available as a 4-door, 5-seat sport utility. Starting at $18,720, the 2010 Chevrolet HHR LS is powered by a 2.2L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 32-mpg on the highway. The top of the line 2010ChevroletHHRSS , priced at $ 26,255 , is powered by a 2.0L , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway.