Found some more decontenting to work around.
The 2003-2013 GMT800 & GMT900 trucks don't have a cabin air filter.
Call me odd but I like to keep the pollen and other organic crud out of the AC evaporator so it doesn't grow microscopic critters like Legionella bacteria and Black Mold to kill me.
GM PI1216 is the GM service bulletin that pertains to adding this nice little feature back onto our trucks. NHTSA link to the PDF
PI1216 Cabin_filter.pdf
Rumor has it that not all of the 2003-2013 GMT800 & GMT900 trucks are capable of this upgrade. Note the caveat in the opening lines of the PI about RPO C67...
Using GM parts...
- 22759208 GM housing cover and screw.
- AC Delco CF194 Paper Cabin Air Filter
- 23101674 GM Activated carbon cabin air filter
Using Dorman Parts...
- Dorman 259-100 Cabin Air filter cover plate with screw
- Dorman 259-200 Paper Cabin Air filter retrofit kit (GM 22759208 & CF194)
- Dorman 259-000 Paper Cabin Air filter
- Dorman 259-201 Activated Carbon Cabin Air filter retrofit kit (GM 22759208 & 23101674).
- Dorman 259-001 Activated carbon Cabin Air filter.
I like activated carbon filters, and rodents don't, so I installed a Dorman 259-201 kit in my truck using a Dremel to cut open the bottom of the air handler housing as outlined in the above GM Service Bulletin. It fits like a glove. Sorry I didn't take pictures. Read the PI there's no difference.
BTW I can't find a valid reason to re-install the beauty cover on the bottom of the air handler. It appears it's just bling... I'd rather they deleted that than the cabin filter.