Thank you for your help. After going to the dealer today for an oil and filter change, I am told that all 2013 GMC Sierra 1500's have cabin air filters- none. Whatever GM's calculus is, my fan is just wide open to particulates. I was told though that I could have the service tech (or I could do it which is way above my pay grade) cut out a plastic section of the blower frame component and put in my own filter along with a separate bracket to hold it. I was advised to not have this done or for me to do it. My question to the service advisor was what else was left off of my truck to save money that could be installed later at additional expense? I did not expect nor got an answer on that. I'd just rather buy the filters and replace them as needed and prolong the fans life but that's just me. Thank you very much for your help. I took my cabin air filter back to the other dealer across the street and exchanged it for an air filter for the motor which I KNOW i'll need!
Thursday, December 1st, 2016 AT 8:50 AM