Where does the hose goto? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ho70** · 08-04-2020, 01:51 PM

Where does the rubber hose from the firewall mounted diaphragm (?) above the firewall heater box go to? I think it's the charcoal canister.

**truckster** · 08-04-2020, 03:03 PM

If it's the one I think you're talking about, it goes to the heater control. It opens and closes the cowl vent.

**Ironangel** · 08-04-2020, 07:31 PM

Quote:

Originally Posted by truckster

If it's the one I think you're talking about, it goes to the heater control. It opens and closes the cowl vent.

I was going to comment and then realized "which rubber hose?"...I got the manual out and found a vacuum hose diagram for AC trucks but again it left me wondering which hose because there are three in that area. Two go to individual vent doors and a third goes to that round vacuum canister in the pic, and yet there is a vacuum control head switch located at the top of the evaporator box in the pic...Need more definition...Makes me glad I have the two windows with wings AC after reading all the ins and outs of the factory Four Season AC Systems...I live in Nebraska, had to turn the heater on last night!

**Sheepdip** · 08-04-2020, 08:13 PM

See post #3

http://67-72chevytrucks.com/vboard/s...ad.php?t=76770

**ho70** · 08-06-2020, 12:43 AM

thank you

08-04-2020, 01:51 PM	#1
ho70 Registered User Join Date: Nov 2013 Location: Winnipeg, Mb Posts: 1,115	Where does the hose goto? Where does the rubber hose from the firewall mounted diaphragm (?) above the firewall heater box go to? I think it's the charcoal canister. Attached Images Last edited by ho70; 08-04-2020 at 02:18 PM.

08-04-2020, 03:03 PM	#2
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,953	Re: Where does the hose goto? If it's the one I think you're talking about, it goes to the heater control. It opens and closes the cowl vent. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson

08-04-2020, 08:13 PM	#4
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,579	Re: Where does the hose goto? See post #3 http://67-72chevytrucks.com/vboard/s...ad.php?t=76770

08-06-2020, 12:43 AM	#5
ho70 Registered User Join Date: Nov 2013 Location: Winnipeg, Mb Posts: 1,115	Re: Where does the hose goto? thank you



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