Mode door squeak

[Daniel Brazzle]

Hey guys has anyone heard their mode door squeak before. When I turn on my A/C and the mode door opens there is a squeak at the very end of them opening all the way to the front vent position. I sprayed the actuator mechanism but didn’t change anything. It seems like it might be rubbing on the hvac wall. If I run the ac for awhile And the hvac box gets cold it won’t do it until it warms back up. Should I spray some graphite grease on the door itself so it won’t collect dust. Everything work fine with it. It’s on a 2011 Silverado. Here is the video
https://m.youtube.com/watch?feature=emb ... l38SXWHPR4