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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


GM Comfortron Climate System

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GM Comfortron Climate System Empty GM Comfortron Climate System

Post by 77mali Thu Jun 28, 2012 8:22 am

This is pretty cool & interesting. This was available on 73 Chevelle wagons, don't know if it carried over to any more years.

GM Comfortron Climate System 1973_c12
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Post by Mcarlo77 Thu Jun 28, 2012 7:20 pm

Seen Olds style Comfortrons on '73-'77 Cutlasses...but, never seen Comfortrons on the other GM "A" bodies of that period.
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Post by texan01 Thu Jun 28, 2012 11:07 pm

I've not heard of it in any G3, but the service manual doesn't go into any detail on what carlines had it either.

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Post by Mcarlo77 Fri Jun 29, 2012 9:12 am

Here's a setup I pulled off a '75 Cutlass Salon 2-dr. The Olds version doesn't have the rotary dial...but, instead has the slide bar across the temp control. Never did get any interest in the heater-a/c box and think I finally just threw it out.

GM Comfortron Climate System Cutlas13

GM Comfortron Climate System Cutlas12
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Post by texan01 Sat Jun 30, 2012 6:21 pm

That control head looks like a standard C60 system. there's no Auto position. Olds used temperature callouts on the standard 4 Seasons for a few years, at least on the B-bodies.

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Post by Mcarlo77 Sat Jun 30, 2012 6:54 pm

The auto position is dictated by the slide bar on the bottom. The smaller flex tube has an air inlet screen that mounts on top of the dash and the air that is circulated down through that is sent down to the box controls/sensor and the temp is regulated. I sold this dash temp control to a guy who needed one for his Cutlass Comfortron.
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