while doing some maintenance on my 2014 CTS4 Sport Wagon 3.0 I checked both the cabin air and engine air filters and decided I might need new ones soon...both of these were reported by Cadillac over the period of my ownership and during the warranty period to have been replaced every time they did an oil change...I never believed they were changed only thinking they were checked...
a little over a year ago I checked both of these within a couple months of seeing that my Cadillac dealership had reported they were changed and found the cabin air filter needed replacement (not terrible but not the clean, white appearance of new) and the engine filter received a shake out but appeared to still be serviceable...when trying to buy a new cabin filter on my own, I couldn't source one in stock OEM so I made due with a cheap STP brand as I also wanted to try any benefits that might arise from replacing the white particular MicronAir OEM with a charcoal impregnated filter...I reported on this Forum that the STP seemed to have far less pleats (as I also see on any of the charcoal type cabin air filters) and was significantly lighter than the OEM MicronAir
so after about 13 plus months with the STP brand charcoal cabin air filter I can report that upon inspection it appeared to look much as it did when I bought it and that it did not have any foul odor to it but I can also report that it did not seem to have any positive affect on odors entering the cabin of my CTS as I have on rare occasion still smelled the musty, air conditioning smell despite having AfterBlow activated as well...
I'll probably wait until nicer weather than we are receiving in ChicagoLand to make the filter changes since both filters are slightly dirty but not really dirty enough to make me replace them now but thought I'd share in case anyone was trying to decide on what cabin air filter to but...further...some searching of this Forum seems to show that AC Delco, WIX cabin air filters are made by MicronAir and are OEM...
As to the engine air filter, I found no markings showing who made this for AC Delco other than the one I bought is also OEM and has the light blue, rubber like surround and white paper pleats and appears to be of good quality...
as always, YMMV and good luck with your choice
Bill
a little over a year ago I checked both of these within a couple months of seeing that my Cadillac dealership had reported they were changed and found the cabin air filter needed replacement (not terrible but not the clean, white appearance of new) and the engine filter received a shake out but appeared to still be serviceable...when trying to buy a new cabin filter on my own, I couldn't source one in stock OEM so I made due with a cheap STP brand as I also wanted to try any benefits that might arise from replacing the white particular MicronAir OEM with a charcoal impregnated filter...I reported on this Forum that the STP seemed to have far less pleats (as I also see on any of the charcoal type cabin air filters) and was significantly lighter than the OEM MicronAir
so after about 13 plus months with the STP brand charcoal cabin air filter I can report that upon inspection it appeared to look much as it did when I bought it and that it did not have any foul odor to it but I can also report that it did not seem to have any positive affect on odors entering the cabin of my CTS as I have on rare occasion still smelled the musty, air conditioning smell despite having AfterBlow activated as well...
I'll probably wait until nicer weather than we are receiving in ChicagoLand to make the filter changes since both filters are slightly dirty but not really dirty enough to make me replace them now but thought I'd share in case anyone was trying to decide on what cabin air filter to but...further...some searching of this Forum seems to show that AC Delco, WIX cabin air filters are made by MicronAir and are OEM...
As to the engine air filter, I found no markings showing who made this for AC Delco other than the one I bought is also OEM and has the light blue, rubber like surround and white paper pleats and appears to be of good quality...
as always, YMMV and good luck with your choice
Bill