We had a 2006 Sun Voyager and your doghouse cover may be the same. The Workhorse fuel ring recall necessitated getting the cover off. Under the rug edging (flap) around the cover are screws which need to be removed. As I recall there were about 8 of them. To complicate matters the cover carpeting was glued and that was more of a process than the engine work. The servicemen had to pull the carpet on the cover away from the carpeting on the floor. Screw removal was somewhat difficult since glue had gotten around them. Hopefully, this will help. Charlie