1. Have no idea, don't have the vac
2.) Those are usually max-air vent covers, available CW and other trailer sales places. I think that we paid about $25.00 a piece for them 3 years ago, but, that is a long time ago, memory losses and all that. Al installed ours, I think if you are half way handy with tools you could do it. They keep the water out, you can leave the vents open 24-7 if you want and never worry about the rain getting in. We find very useful.
3.) I thought the filter was a piece of washable foam, but maybe they have changed that too in the years since we purchased. Suggest - get up there, take that cover off and have a look. Let us know, I am curious bout that!
Carol
Oh, and congrats on that new 3400!!!
(Thanks Glenn)
Al & Carol Stevens Tipton, Mi.
Retired - Traveling with 4 Yorkies
2004 3295RK
2003 GMC 3500 Allison/8.1
PullRite 15.5K Super 5th
Line-X
JackRabbit tonneau cover
Bilstein shocks
Isolator Pin Box
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