#1  
Old 03-22-2020, 06:41 PM
TNance nanceten@gmail.com TNance nanceten@gmail.com is offline
Junior Member
 
Join Date: Mar 2020
Posts: 1
Default 1971 GTO A/C Heater control vacuum question.

I have a 71 GTO w/ac that does not have a heater control value or vacuum line coming out of the fire wall. Could it be possible that it has a 72 GTO A/C unit that did not use this control value? This car was built in April on 71 but has some 1972 option on the bill sheet.

  #2  
Old 03-22-2020, 08:23 PM
70gtojosh 70gtojosh is offline
Member
 
Join Date: Jan 2019
Location: MN
Posts: 34
Default

I have a 70 gto that did have the heat control valve in the heater hose and vac line with the 3 pin switch in the control panel assembly. Fought like hell to get all the parts I needed to get it to work and the handful of 71 units I had in my hands did not have the 3 pin switch and valve. So I would not be surprised if your car is not suppose to have that. I wonder if they discontinued the heat control valve because of freezing evaporators? I would be curious to see if someone with a original 71 could tell us if their car had a heat control valve ( but I guess you would be to) good luck

  #3  
Old 03-30-2020, 01:47 AM
Mister Pontiac's Avatar
Mister Pontiac Mister Pontiac is offline
Ultimate Warrior
 
Join Date: Oct 2011
Location: North Phoenix, AZ
Posts: 1,055
Default

My early build 71 has the heat control valve. I simply assumed it was correct for 71. Maybe a midyear change item though? I'm sure the more knowledgeable guys will chime in with the correct answer.

__________________
Eric "Todd" Mitten

'74 Bonneville 4dr Sedan (455/TH400/2.93 open)
'72 LeMans GT (455/M-13/3.23 [8.5"] posi)
'71 GTO Hardtop (400/TH400/3.07 12 bolt posi)
‘71 GTO Convertible (455HO/TH400/3.23 posi)
'67 GTO Coupe (455/ST-10/2.93 posi)
'67 Tempest Wagon (428/TH400/2.56 posi)

Deuteronomy 8:3
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:18 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017