I haven't heard that the trunk dimensions are any different. The DEF is in the spare tire well, and other than using up the space for a spare tire doesn't really raise the floor that I am aware of. The only thing is a sort of thick foam pad on top of it. That might add an inch to the floor height. Not sure if the standard Cruze has that.I was more asking if the dimensions for the side wall are the same for the gasser vs the diesel than the quality of the Kicker or any other specific system or enclosure...