I have been working on my Blazer since I bought it. I put in a new engine and radiator, heater core, blend door actuator, and a new lines. I just need one more part and noone knows the name of it. The blend door actuator bolts to a box and that box is what I need. I cannot find it and I cannot get the name of it. In order for me to get the new part I need to know exactly what I am asking for. If somebody knows the part I am talking about, I would greatly appreciate this vital piece of knowledge. Thanks so much.

 

Here is a link to the GM parts catalog for 2000 Blazer HVAC:

Light Truck Chevrolet 2000 BLAZER TRAILBLAZER 4WD BODY MOUNTING-AIR CONDITIONING-INSTRUMENT CLUSTER Car parts for your Buick, Cadillac, Chevrolet, Hummer, Light Truck, Oldsmobile, Pontiac, and more!