I want to cut out a hole in the HVAC system to retrofit a cabin air filter into my 2005 Chevy Express 2500. But after looking at a ton of videos, assembly diagrams, etc., I simply do not understand where I should retrofit an air filter. Any help would be amazing!

 

If the HVAC system is anything like the one in my old 2003 Yukon or my 2006 Silverado, the factory cabin air filter would go into a slot in the black air handler under the passenger side of the dash, with the filter accessible pretty much by removing the glove box. What's funny is that while my 2003 had a cabin air filter, the 2006 has a molded feature that LOOKS like the edge of the removable air filter, but is not - There is no actual opening there, but a rectangular area that LOOKS like it should be the cabin air filter slot, but is molded over.

 

No, it is not like those. It does not actually have any cabin air filter and does not have a location to add an air filter like other GMT800 trucks do. Furthermore, the rectangular area you are referring to does not exist on these vans, so a retrofit cabin air filter could not be placed there.

 

Ok - well, hopefully someone with one of these vans can come along and help! Good luck!

 

Hey, any luck with this idea? My wife has terrible allergies and I’d like to add a filter, even if I have to make my own housing and everything.