I pushed something up against the air outlet damper and broke off one of a bosses that guide the damper as it is opened. That's the air control on the dash. One of the round outlets with the two dampers that you spin to direct the air and open/close to change the flow rate.

Anyway, one of the pivot projections gave way. Any experience here on what part is available? A single blade or an assembly of the whole outlet?

Can't find a parts diagram for this and would not know how to remove the assembly anyway. I do have the single blade out and am attempting a repair.

 

If this is one from the center of the dash, I've got a couple laying around.

 

Yes it was one of the centre outlets.

I fixed it with epoxy by cementing the broken tab back in place. If I had lost the tab I could have glued a wire with the same diameter and about 5cm long to engage the pivot hole. I removed the unit by removing 3 screws after prying out the facia covering the radio and holding the outlets.

The GM part - an assembly of 5 or 6 components - was priced at 72CAD. Apparently left centre and right centre outlets are different.