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Old 11-21-2016, 04:27 PM   #11
jtrichard
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Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
Re: Heater Core Removal - 64 C-10 - Thrift Air

This is all you wanted to know about heaters but were afraid to ask (excerpt from link above )

"As far as I know there are 4 heater options 60-66 chev and gmc."
1) no heater: firewall delete plates- 60-66 (upper delete plate is the same all years, lower is 60-61, and then 62-66)
2) cheap heater: "recirculating", core and fan inside cab- 60-63
3) cheap heater: "thrift-air", same as deluxe, smaller core but only 1 knob for fan and air.-64-66
4) deluxe heater: "deluxe", core and fan in engine compartment.-60-66
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