Defrost door part question

[FLAGG]

Does anyone know the proper name or GM part # for the little plastic clip that connects the actuating arm to the air diverter door for the defrost? It's the little one that, when broken, won't allow the system to blow air to the windshield.

I stopped by the local dealership parts department, but they didn't know what I was talking about and the exploded assembly view he showed me didn't seem to have the clip shown.

Thanks in advance.