Hi I have an 06 F150 XTR and I have been told my HVAC plenum has to be replaced due to my mode door foam falling off and jamming it. The truck only would blow out the vents. I have the trucks dash off already and have just accessed the HVAC. I am wondering how to remove the HVAC, it seems stuck right now. It is too bad because the plenum is right on top and looked easy to remove at first. Any help on this would be appreciated. Along with tips for when I am putting everything back together. Thanks in advance.