72 Suburban rear A/C unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 DIRTY RAT · 10-12-2021, 06:35 PM

Hi Guys, I need opinions!
My 72 A/C is all original. The fans work front and back, but the back fans are way to noisy! It needs some minor other work to get operational but I am thinking of getting rid of the rear unit (it’s so bulky) and buying/retrofitting a whole new updated A/C system. That means front air only!
The question is whilst the new systems are great, would they cool the whole cabin?

BAD1916 · 10-13-2021, 12:45 AM

I don’t have experience with a front only setup so I can’t comment on that. However, if your truck has been insulated well I would think that it would cool well.Hopefully others will chime in with real world info.

72 DIRTY RAT · 10-13-2021, 04:37 AM

I have put new insulation everywhere, plus I very rarely use the back seats.

BigBird05 · 10-28-2021, 07:31 AM

72 Dirty Rat, is your A/C unit roof mounted? I have a floor mounted unit listed in the for sale section with a picture. I don't know if the fans are the same or not.

FLYNAVY30 · 10-28-2021, 12:18 PM

I have an original front and rear A/C set up, although it was not operable when I purchased my truck. I replaced the front unit with a vintage air set up. I can assure you, it will not cool the entire truck. Its comfortable in the summer with the air blowing on you in the front, but the middle and rear does not get comfortable. Just too much glass and too much space. At some point I will attempt to either integrate the factory rear A/C with the vintage air, or replace it with a second vintage air system.

19Suburban69 · 11-22-2021, 03:02 PM

I've got dual vintage air on my '69 C20. Recently did LS swap and used stock compressor. works just fine. Winter I use rear heat because I don't like front vents blowing in my face with heater.

72 DIRTY RAT · 12-18-2021, 12:54 AM

Thank you for all the replies! I ended up just pulling the rear system out, I will eventually get vintage air for the front, I really only need the front air anyways!👍👍

FLYNAVY30 · 12-18-2021, 09:39 AM

Quote:

Originally Posted by 19Suburban69

I've got dual vintage air on my '69 C20. Recently did LS swap and used stock compressor. works just fine. Winter I use rear heat because I don't like front vents blowing in my face with heater.

Any chance you could give us some additional info on where/how you mounted the second vintage A/C unit and how the plumbing works?

Thanks!

19Suburban69 · 01-28-2022, 01:45 AM

Quote:

Originally Posted by FLYNAVY30

Any chance you could give us some additional info on where/how you mounted the second vintage A/C unit and how the plumbing works?

Thanks!

Previous owner bolted generic vintage air blower unit to roof then built box around it. Freon and wiring run down right rear corner thru floor and along frame to front.

polishspy · 01-28-2022, 10:45 AM

Quote:

Originally Posted by FLYNAVY30

Any chance you could give us some additional info on where/how you mounted the second vintage A/C unit and how the plumbing works?

Thanks!

So this is what i had put together to run an under dash front unit and s small unit under the front seats. The plumbing has two selenoids to feed each of the units and 2 set of dryers.
vintage air part numbers - 751170 (evaporator), 521171 (hoses), 021567 (condenser), 110061 (fittings for compressor)
Monster condenser, PN 037030-OVR
Sanden 709, PN 04709-VMA

WannaBe68 · 01-28-2022, 12:09 AM

At least here in Texas - the 2nd and 3rd rows can become pretty warm for the boys. But my wife and I are comfortable with the front only Vintage air system :-)
I do, however, have a complete rear system that I plan to install this year some time to give them a break during our summer road trips.

10-12-2021, 06:35 PM	#1
72 DIRTY RAT Registered User Join Date: Nov 2009 Location: Sydney, Australia Posts: 49	72 Suburban rear A/C unit Hi Guys, I need opinions! My 72 A/C is all original. The fans work front and back, but the back fans are way to noisy! It needs some minor other work to get operational but I am thinking of getting rid of the rear unit (it’s so bulky) and buying/retrofitting a whole new updated A/C system. That means front air only! The question is whilst the new systems are great, would they cool the whole cabin? __________________ 1972 454ci Burb, C20 3/4T, T700, 2WD 1969 540ci Vette, 540ci Aluminum BB,755 BHP & 734 LbFt torque, No NOS, No Forced induction! Just BIG CUBES

10-13-2021, 12:45 AM	#2
BAD1916 Registered User Join Date: Oct 2012 Location: VENTURA COUNTY CALIFORNIA Posts: 302	Re: 72 Suburban rear A/C unit I don’t have experience with a front only setup so I can’t comment on that. However, if your truck has been insulated well I would think that it would cool well.Hopefully others will chime in with real world info.

10-13-2021, 04:37 AM	#3
72 DIRTY RAT Registered User Join Date: Nov 2009 Location: Sydney, Australia Posts: 49	Re: 72 Suburban rear A/C unit I have put new insulation everywhere, plus I very rarely use the back seats. __________________ 1972 454ci Burb, C20 3/4T, T700, 2WD 1969 540ci Vette, 540ci Aluminum BB,755 BHP & 734 LbFt torque, No NOS, No Forced induction! Just BIG CUBES

10-28-2021, 07:31 AM	#4
BigBird05 Registered User Join Date: Aug 2019 Location: Cheraw Posts: 1,300	Re: 72 Suburban rear A/C unit 72 Dirty Rat, is your A/C unit roof mounted? I have a floor mounted unit listed in the for sale section with a picture. I don't know if the fans are the same or not.

10-28-2021, 12:18 PM	#5
FLYNAVY30 Registered User Join Date: Apr 2013 Location: Austin, TX Posts: 592	Re: 72 Suburban rear A/C unit I have an original front and rear A/C set up, although it was not operable when I purchased my truck. I replaced the front unit with a vintage air set up. I can assure you, it will not cool the entire truck. Its comfortable in the summer with the air blowing on you in the front, but the middle and rear does not get comfortable. Just too much glass and too much space. At some point I will attempt to either integrate the factory rear A/C with the vintage air, or replace it with a second vintage air system. __________________ 1972 C20 Suburban 1964 Corvette Coupe 1997 Lexus LX450

11-22-2021, 03:02 PM	#6
19Suburban69 Registered User Join Date: Nov 2018 Location: Applegate, Ca 95703 Posts: 53	Re: 72 Suburban rear A/C unit I've got dual vintage air on my '69 C20. Recently did LS swap and used stock compressor. works just fine. Winter I use rear heat because I don't like front vents blowing in my face with heater. __________________ 1955 Chevy, 2 dr post, my first car 1969 Chevy C20 Suburban, 6.0 LS w/4L80 2001 Silverado Z71, 5.3 extended cab

12-18-2021, 12:54 AM	#7
72 DIRTY RAT Registered User Join Date: Nov 2009 Location: Sydney, Australia Posts: 49	Re: 72 Suburban rear A/C unit Thank you for all the replies! I ended up just pulling the rear system out, I will eventually get vintage air for the front, I really only need the front air anyways!👍👍 __________________ 1972 454ci Burb, C20 3/4T, T700, 2WD 1969 540ci Vette, 540ci Aluminum BB,755 BHP & 734 LbFt torque, No NOS, No Forced induction! Just BIG CUBES

01-28-2022, 12:09 AM	#11
WannaBe68 Registered User Join Date: Jun 2016 Location: Texas! Posts: 430	Re: 72 Suburban rear A/C unit At least here in Texas - the 2nd and 3rd rows can become pretty warm for the boys. But my wife and I are comfortable with the front only Vintage air system :-) I do, however, have a complete rear system that I plan to install this year some time to give them a break during our summer road trips.



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