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Old 02-13-2014, 04:54 PM   #10
motornut
78K & 79C Jimmys
 
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Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: Any point keeping non functioning AC unit under the hood?

yes they are different boxes,i used the AC dash vents on the heat setting,sure helps get warm faster,switch back to defrost as needed
non AC trucks have two foot vents AC have only one pass side
AC trucks use engine vac for moving the controls, non AC use cables
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1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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