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#1 |
Registered User
Join Date: May 2013
Location: fredericksburg
Posts: 26
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72 A/C vacuum line diagram
Just ended up with a very nice 72 w/factory A/C unit works but there is no vacuum lines running to the inside at all..the canister is on the case...I can see a vacuum motor on the pass side with nothing going to it...so hoping somebody has a diagram for one of these...thanks Rob
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#2 |
72 GMC
Join Date: Feb 2008
Location: Wells, Maine
Posts: 534
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Re: 72 A/C vacuum line diagram
Here ya go
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#3 |
Registered User
Join Date: May 2013
Location: fredericksburg
Posts: 26
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Re: 72 A/C vacuum line diagram
thanks !!!!
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#4 |
72 GMC
Join Date: Feb 2008
Location: Wells, Maine
Posts: 534
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Re: 72 A/C vacuum line diagram
my pleasure
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#5 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 72 A/C vacuum line diagram
Welcome to the board!
Here is a link where you can download the service manuals. They have a lot of A/C information. http://67-72chevytrucks.com/vboard/s...d.php?t=558016
__________________
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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#6 |
Registered User
Join Date: May 2013
Location: fredericksburg
Posts: 26
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Re: 72 A/C vacuum line diagram
thanks...have to figure out what I have...the A/C compressor' lines, dryer, not factory, evaporator case ??? inside was original A/C truck...all that appears correct, do no see the outside air door diaphragm at all...the RIC diaphragm is there..controls are correct I believe...thanks again for all the help ! Rob
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#7 |
72 GMC
Join Date: Feb 2008
Location: Wells, Maine
Posts: 534
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Re: 72 A/C vacuum line diagram
Sorry
Didn't even notice you were new Welcome ! |
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#8 |
Registered User
Join Date: May 2013
Location: fredericksburg
Posts: 26
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Re: 72 A/C vacuum line diagram
Oh...no problem...been on many sites regularly....just found this after getting this truck...anybody know where the outside air door diaphragm is supposed to be ?? thanks !
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#9 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 72 A/C vacuum line diagram
Here they are...
__________________
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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#10 |
Registered User
![]() Join Date: Jun 2012
Location: springfield mo
Posts: 3,075
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Re: 72 A/C vacuum line diagram
Not to jack the thread, but what controls the pass. side inside air vent, mine quit working on me
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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#11 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 72 A/C vacuum line diagram
Take a look at the vacuum map in post #2. The control head switch controls the vacuum to all the vacuum motors and the coolant valve. If the recirculation vacuum motor is not working, I'd check it first with a hand vacuum pump and work backward from there. You need to be reading the service manual to diagnose this vs throwing parts at it. Could be the motor, switch, hoses, or source vacuum.
__________________
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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#12 |
Registered User
Join Date: May 2016
Location: Imperial Beach, Ca
Posts: 18
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Re: 72 A/C vacuum line diagram
Is there a kit for the vacuum hoses? If so do you know where i can get it? I'm restoring a 1969 c20
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#13 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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I've never seen a kit.
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__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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