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Click on image for the lowdown. 
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| | | Forums66 Topics128,036 Posts1,055,454 Members48,422 | | 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: Jul 2010 Posts: 96 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 96 | Hi Folks, Thia may sound dumb but I think I've forgotten how the heater controls work. Starting from the top the lever says FAN and slides horizontally. I think LO speed is to the left and HI is all the was to the right. Next down is INSIDE AIR and OUTSIDE AIR. All the way left is inside and all the way to the right is outside. Beneath these two sliders are two controls that slide vertically. To the left is TEMP and on the right is DEFROST. Am I correct in thinking that when the left (TEMP) slider is all the way down there is more heat? When the right slider (DEFROST) is all the way down that gives me more defrost depending on how far down I slide it? Many Thanks for your help. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | | | | | | Joined: Feb 2005 Posts: 531 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 531 | Sepp, I don't know what you're planning but I used a stock 56 heater and hooked it up to the heater control unit. I don't have the fancy stuff to make it function like it should so it's basically just an on/off switch and defrost.... but it looks cool. | | |
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