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Old 07-17-2014, 05:44 PM   #4
motornut
78K & 79C Jimmys
 
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Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: 4 or 5 prong HVAC blower switch

my 78 has three speed fan no off
my 79 has four no off
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1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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