Hello Gear Heads;
"70 Chevelle A/C Htr control has a vacuum leak at the temp. control lever vacuum switch.

Is this repairable w/o sending to vendor for a $50.:confused:

Your help is appreciated:noway:

Thanks.
Ray

Greetings from Arizona
Could be multiport vacumn valve on controller...very common problem
and most parts house's can get them..pull apart to check it and count
number of hose connections several different ones made...GM dealer may also have them..
Jay

67 Elcamino
68 Malibu 2dr

welcome to the site.

Welcome!!