The 2006 Chevrolet HHR is available as a 4-door, 5-seat sport utility. Starting at $15,325, the 2006 Chevrolet HHR LS is powered by a 2.2L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 23-mpg in the city and 30-mpg on the highway. The top of the line 2006 Chevrolet HHR LT, priced at $16,325, is powered by a 2.2L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 23-mpg in the city and 30-mpg on the highway.