I’ve got a 2013 Z71 Tahoe. Lost air on drivers side last week which turned to heat. Air blowing cold on passenger side and in rear. I figured blend door actuator was bad so I pulled it to replace and while doing this the tab that protrudes through the air box and fits into the actuator from the blend door literally fell into my hand in pieces. So I’ve looked high and low for someone who’s experienced this but haven’t found anything. I know at this point I’m heading towards pulling the dash to be able to replace this but was curious if anyone has done this job or knows where I could get info on pulling the dash, etc or possibly a different approach to fix the problem. Thanks in advance!