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Re: 72 A/C K20 no defrost help request
That hose off the intake hooks up to the vac ball, if it I open ended then you have a vacuum leak. The other port on the vac canister goes to the heater control. The vac canister and diverter box are available. I just got a diverter box from gmpartsdirect.com (I think I'll have to look I have the #) for 80 bucks
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1971 Cheyenne SWB 402BB, 700R4, 3.73 posi, PS, PB, A/C, Tilt, Tach
"Wanda"
Don't argue with idiots, People watching may not be able to tell the difference...
There's someone in my head........But it's not me......
cheap tricks thread great info here!! http://67-72chevytrucks.com/vboard/s...d.php?t=489394
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