Vannin' Community and Forums Forums Chevy How to.... What is the Hot - Cold lever on the AC physically attached to?

I have plans to take my dash off later this year to replace the heater core so I guess I'll figure it out then, but in the meantime I'm curious.

When I move the hot/cold lever from side to side there's a surprising amount of resistance and I can hear something moving around in the passenger footwell. I'm assuming there's a mechanical linkage to some sort of baffle that allows air in from the heater core.

Any tips for smoothing out this linkage so I don't feel like I'm about to snap off the little lever any time I move it?

Edit: Forgot to mention, this is an 88 Chevy G20

Don’t know what you’re working on but probably cable to a lever/door on your plenum. Check for obvious bends/ l routing problems. Maybe some lube, could also be restrictions or damage in the plenum.

All Sam said, Yes indeed. like control cables on a boat. Blend door could be stuck/sticking. Had the linkage fail while underway on a 97 GMC Sierra 1500. POP!!