I'm assuming that all the 4th and 5th gen have the same part, but I have a 2012 2500.

I'm wondering what the fan part number is if somebody has that in their notes on their phone somewhere.

I plan to do the cabin filter mod to add a filter and the door and cut out the plastic fit blocks off where the filter goes.

Then maybe easily swap out the fan just below the glove box with the three 5/16 bolts because, at times, I can hear a change in pitch, almost like one of the bearings going bad.

It has been like that for a year or two tho.

I figure that without an air filter, the bearings and fan must have had a rough life so far. Not sure why our $60k+ trucks don't have the filter, but cheap vehicles do.

Anyway, I'll add the write-up to the nopb information database sticky.