Review on 🌬️ Premium Performance ACDelco Gold CF1236C Cabin Air Filter for Superior Air Quality by Roberto Evans

Because some sort of GM bean counter decided to move the cabin air filter out of the Exclude GMT800 series from 03-07, for this the air distributor under the dashboard must be opened and a modified GM cover installed. The screw plug and its slot are already cast into the truck and it only took 15 minutes and a handsaw to open the hole. However, it took longer to clean up 12 years of dirt that had accumulated since my truck, a 2005 Sierra 3500, didn't come with a filter. The filter itself fits, but I will not buy it a second time. There are two versions of this filter: a wide filter or a kit of two narrower filters. To install a wide filter you have to squash and tilt it as the ground/firewall angle gets in the way.