Safety Mod Pass Through to Truck Window

I think those talking about trying to fit through the opening are missing the point. One of our points was letting the cats go back and forth. We had platforms so they could travel looking out the crew cab windows, but they also needed to go to the back to use the cat pan. Another essential reason is heat and A/C. With those passageway open the truck will heat or cool the camper while traveling. If you open a vent that will help the air flow. Usually we did not find that necessary.

You will need a "donut" or boot to form a good seal between the truck and camper. We have a specially made vinyl covered foam filled boot. We got it from our dealer who I believe got it from Northstar. I saw it listed on the Northstar webpages.