WTB: 3rd gen heater core box thing
 

I dont know what GM would refer to it as, but it houses the blend door on a thirdgen...and covers the heater core on the inside.

Attached to it is an aluminum elbow type piece that the cold/hot slider attaches to. My elbow-thing on the car is broken.

If anyone has any 3rd gens theyre parting out...i could use this.

its for a car with a/c...not sure if that makes any difference.