although the weird thing is, the bosses for the Filter cover are on my Evap Box, ready to go. so all I would need to do is cut the hole in the Evap Box where the filter goes, buy the filter cover (and after nosing around in my 2008 Edition Motor brand Crash Estimating Data Book for GM, I FOUND a Part Number for the Filter Cover: 96434187) and shove a filter inside!