This is the part that goes from the HVAC control head unit to the Heat A/C Blend door. This allows it to open and close. It also attaches to the HVAC pivot point we manufacture.
If you service the HVAC head unit the clip where it attaches to the unit or the heater box typically breaks. This makes your temperature control inoperable.
Fits all 1978-88 GM A and GBody cars. Replaces GM part number #10000745.