Re: 71' suburban 4x4
That is just a fresh air vent. It gets it's outside air from the cowl.
Your heater control is non A/C
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My Classics:
'72 K20 Suburban + '65 Dodge Town Wagon
'72 Corvette Roadster +'67 Corvette Roadster
'73 Z-28 Camaro
'63 Ford SWB Uni Pickup
'50 Ford Coupe
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