I replaced the blend door through the glove box. The dealer would take the dash off and charge you $1000 plus. This is a little bit of work but will save you $1000. There are two compatible blend doors at the auto parts store. The one you want is the Dorman 902-220. If you get the Dorman 902-207, you won't be able to install it. The 902-220 has a removable bottom shaft that you will insert after installing the blend door.