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Click on image for the lowdown. 
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| | | Forums66 Topics128,014 Posts1,055,324 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2006 Posts: 1,154 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,154 | It looks like the one in the upper LH corner....fresh flow. I guess GMC and Chevy both used this design. It certainly is not the round or heavy duty type. The little door is to bring fresh air from outside through the lovers on the side of the cab to mix with warm air...is that what makes this a delux heater? Was it made by GMC or Harrison.
Thanks for the help TC
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