71 GMC air intake vent by foot brake: floppy?

[TomShilling]

The driver side air vent flap for some reason is now kind of hanging: the passenger side opens and closes just fine... is there a connection on the back of the flap to keep it from flopping? The rod connected to the pull-knob is connected, but the whole metal flap is hanging kind of crooked... mabe something fell off?

Thanks for the tips!

[71Chev]

Maybe the pivot pin broke off the bottom of the vent flap. Or if it has been raised, maybe the pin just popped out of the hole. To remove/install the door/flapper, lift it up and move the bottom into the cab, then pull down. If it's the pin is broken off, someone on the parts board will have a used door flapper to replace it. Teeitup should be able to fix you up.