96 Silverado Bagged and Bodied (Part 14 A/C Box)

The heater A/C control unit has blend door actuators, evaporator, and heater core. Remove a couple of bolts from the fire wall. 10mm bolts hold it together, remove the dash to access this. Flip it over to get the orientation right. On this case itself, fan blower, air inlet, blend door that opens and closes the valve. Recommend replaces all parts since it's hard to get to.
This blend door actuator is by your foot pedals; it controls your defrost and sends air out the sides to defrost windows. The other behind the glove box is pretty challenging, but can be removed without taking the whole unit out. You can tell if the blower motor resister goes out because you'll get only high or medium high fan speed. If you're going to pull the dash out I recommend replacing all the parts. It'll cost around $500 depending on where you live and cost of parts, but it's worth doing it all together.
A couple of fasteners 7mm need to be removed to get the cover off. The heater core is clipped in. Replace the foam, too, if it doesn't come with it. A/C condenser has bolts and sealer that need to be zipped off. Pull straight up, push back and wiggle it a little bit. They can get clogged up.
10mm bolts are on the fire wall holding the whole unit in place. The defrost door has a blend door actuator. You can test it with the four wires connecting to it. Good to clean out the leaves and crud. There are 3 blend door actuators. When you take the cap off, the box gets week, so be careful.

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