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Old 08-07-2015, 10:13 PM   #1
Lurayfarmer
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Join Date: Mar 2014
Location: Luray, VA
Posts: 73
Heater Control Valve

My '72 GMC has what appears to be a replacement heater control valve in the engine compartment. However, the vacuum fitting is not connected to anything, and I can't find any information on this in the service manual. Anyone know what it connects to?
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Bill
Shenandoah Valley of Va
1972 GMC 2500 Sierra Grande
402, Custom Camper Package
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