K20 uncommon HVAC Control unit

[Nomadic]

Hey all,

Need some help with my HVAC control unit. I'm looking to buy a new one, this units not worth repairing. Problem is it doesnt match any units I can find online. Its an AC truck, but only has selections for AC, Heat, Defrost. All the AC units I find online have a bunch of different modes for AC.

Anyone know why my trucks odd and how to get a new unit that matches?

'81 K20 Custom Deluxe.

 

[bucket]

Looks like you have an aftermarket add-on AC setup.

 

[75gmck25]

All the factory A/C controls I’ve seen have a cable to adjust the temp, and large plastic vacuum connector on the part that controls A/C, defrost, etc. There is a big plastic/rubber vacuum line connector that plugs into the control, and the lines run to the vacuum motors for the hvac.
The control head and it’s connection to the vacuum lines changed a little over the years, although the vacuum motors seem to have stayed about the same.

Bruce

 

[Ken B]

Heat control has a slider broken off, i do not see how to just fix that , need a new contol unit? Can a slider be removed and replaced ?
I only see that LMC has the entire unit for sale, if anyone can shed some light on this for me I would appreciate.

 

[MikecLA]

I love that you want to keep original in that case maybe repair that one. Everything comes apart( with work) so get a similar unit and swap the arm over I say. If it was assembled it can be disassembled, maybe some rivets.

 

[SquareRoot]

Vintage Air. You can thank me later.

 

[Originalthor]

Question do you have dash vents? I want to do ac in my truck that has none but don't want to do the whole vacuum stuff.