Need help fixing ac on 82 c10

[ramirezsl]

I recently bought the ac controls from lmc trucks but it’s missing a part I can’t seem to find nowhere…. It’s that yellow square box on the back… it’s my project car and my ac is next can anybody help me…. The picture below is the old one…

 

[DoubleDingo]

I know nothing about these, but it looks like there's two screws to remove it and swap it over to the new one.

 

[Jgonick]

Its called something like a/c heat mode electric/vacuum select switch

(GM # 470333 / Delco # 15-71518)

Hard to find. Junk yard or Try Ebay

 

[ramirezsl]

Its called something like a/c heat mode electric/vacuum select switch

(GM # 470333 / Delco # 15-71518)

Hard to find. Junk yard or Try Ebay

Thank you I will do some research see what happens…

 

[75gmck25]

That part of the A/C control may be a little different from year to year, so it usually needs to match your truck year (82?). It also has a part number on one side, printed in black. I’m not sure if a single year may have had different part number for this part.

 

[DoubleDingo]

So it's not swappable? Or did the OP throw the one in the trash?

 

[ramirezsl]

So it's not swappable? Or did the OP throw the one in the trash?

It is swappable I can only find for Camaros on eBay

 

[DoubleDingo]

I guess I'm confused. You show a pic of the old one. Did you throw it away? Does the lmc part not have the holes for it?

 

[chevdude]

It's the vacuum mixer for controlling hvac doors in the ductwork from defrost to floor heat to face blast. You will need the vacuum accumulator ball under the hood as well.