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Old 02-05-2018, 06:16 PM   #7
chevyguy_72
Vintage Evil
 
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Join Date: Aug 2005
Location: Broomfield, CO
Posts: 956
Re: 71 blazer heater/defrost box

Quote:
Originally Posted by GMC-YA68 View Post
Yea, but if you put a fan on the firewall, then turned it on...where is it going to blow? - not in that box because it's not connected to it in any way.
Not sure what you mean here?
This has the same engine bay heater core/fan unit... i was just showing the first pic to show that its a non AC unit...
The stock located fan will blow through the heater core and into the cab portion of the heater box... my only question is the reason for the different shaped unit that disperses the heater and defrost.
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