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05-02-2013, 12:33 PM
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#1 |
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Registered User
 
Join Date: May 2013
Location: Co.
Posts: 37
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1972 C20 w/factory air, vent issues
I recently acquired my first 72 Chevy PU. It is super clean and low miles.
However when you turn on the Fan all the air blows (good velocity) thru the AC vents, Even when you turn control lever to heater or defrost. I have checked and I can see all the cables move but that doesn't change air from blowing out only AC vents. Any have any Ideas? Thanks |
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05-02-2013, 12:41 PM
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#2 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 19,996
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Re: 1972 C20 w/factory air, vent issues
The flapper in your diverter box is broken. It is a common problem. Welcome to the board!
__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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05-02-2013, 12:45 PM
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#3 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: 1972 C20 w/factory air, vent issues
the black plastic box like thing on the passenger floor has a flapper inside to divert the air // it is a very common problem that it breaks and cant change directions
choice of either getting a new repo box or foolin around and fixin what you have (not so easy) altho now there might b a fix for that flapper cheaper than the box welcome to the board from daytona beach
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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05-02-2013, 03:54 PM
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#4 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 1972 C20 w/factory air, vent issues
If you don't have them download the manuals to get a good overview of the system.
http://67-72chevytrucks.com/vboard/s...d.php?t=558016 Welcome to the board! Don't forget to post a picture of your truck as I really want to see your Highlander.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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05-02-2013, 04:46 PM
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#5 |
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Junior Member
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
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Re: 1972 C20 w/factory air, vent issues
Welcome. Lets see some pics of the Highlander. I have a SWB highlander and had a C20 Highlander so I am partial to them.
__________________
71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 |
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05-02-2013, 05:20 PM
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#6 |
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Registered User
Join Date: May 2012
Location: Anton, Texas
Posts: 2,364
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Re: 1972 C20 w/factory air, vent issues
Welcome to the forum from Texas...we like lots of pic's....have fun with it.
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05-02-2013, 08:43 PM
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#7 |
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Registered User
Join Date: May 2013
Location: Co.
Posts: 37
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Re: 1972 C20 w/factory air, vent issues
Thanks All. I pulled out the Duct-Air Selector box today and sure enough the flap was broken. Will get replacement and then be good to go.
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05-02-2013, 08:53 PM
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#8 |
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Registered User
Join Date: Jun 2012
Location: springfield mo
Posts: 3,075
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Re: 1972 C20 w/factory air, vent issues
Nice truck
Posted via Mobile Device
__________________
United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son 
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05-02-2013, 09:00 PM
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#9 |
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Registered User
Join Date: May 2012
Location: Anton, Texas
Posts: 2,364
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Re: 1972 C20 w/factory air, vent issues
wow...nice truck x 2
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05-02-2013, 09:02 PM
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#10 |
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The Niner
 
Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,493
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Re: 1972 C20 w/factory air, vent issues
That's a beauty!
I see it's still got the split rims on it.
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
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05-02-2013, 09:14 PM
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#11 |
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Registered User
Join Date: May 2013
Location: Co.
Posts: 37
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Re: 1972 C20 w/factory air, vent issues
Thanks, Yes I got lucky to find this Gem. Garage stored for all of its life. I am trying to figure which rims I'd go to to replace the split rims. Thought about Rally rims but they seem hard to find in 16" 8 lug. May just go with white rim I can put original hub caps on.
402 BB, TH400 |
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05-02-2013, 09:15 PM
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#12 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 1972 C20 w/factory air, vent issues
OK now I want to see the SPID to... there is a thread in my signature if you want to add it there.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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05-02-2013, 11:08 PM
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#13 |
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Moderator
Join Date: May 2007
Location: Southern Cal
Posts: 19,996
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Re: 1972 C20 w/factory air, vent issues
Wow, that's a nice truck! I'd buy some 16" steelies and just swap the caps over.
Posted via Mobile Device
__________________
1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man Last edited by leddzepp; 05-03-2013 at 11:16 AM. |
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