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Hello, I am a newer vette owner. Got the car back in August of 2025.
Could someone please try and help me figure out these vacuum lines.
I’ve looked at all types of diagrams and can’t figure it out. Thanks so much for any advice.
1979 l-48 corvette
This vacuum line runs along driver fender, toward front of car. Where do I connect it? It’s coming from canister under fender Where do I connect this line? It’s not connected. Comes from cruise control ports. This line has a yellow tab. Not sure. Where to connect? It comes from this tee fitting. Above cruise control.
Hello,
Perhaps some clues as to what works and what doesn't.
Do the headlights open and close?
Regards,...
driver headlight goes up strong.
passenger light barely comes up, have to pull rest of way.
cruise control does not work.
wipers work flawlessly from what I can tell. No fluid will spray out tho, for wipers.
Car does not have working AC. Took old r12 components out to shave weight. I will add a picture of top. Lots of aftermarket components.
Google 1979 Corvette vacuum line diagram and select Images. Tons of hits.
I have done this but cannot understand any of the pictures as they don’t specifically say this goes to this and is supposed to be connected this or that way.
Thanks. I will keep studying diagrams and googling. I’ll understand eventually.
Those look to me the Cruise Control vacuum hoses.
You are missing the Servo but the Transducer is still there.
yellow tab hose goes to cruise vacuum pod which is gone from vehicle.
other hose goes to manifold source.
3rd hose I will re trace later today.
that comes from canister and go over diagrams. Again.
I believe I figured it out.
is there any reason for me to hook the manifold cruise control hose back up?
probably not because the vacuum servo is gone.
yellow tab hose goes to cruise vacuum pod which is gone from vehicle.
other hose goes to manifold source.
3rd hose I will re trace later today.
that comes from canister and go over diagrams. Again.
I believe I figured it out.
is there any reason for me to hook the manifold cruise control hose back up?
probably not because the vacuum servo is gone.
The stock intake manifold on a A/T transmission car there was a 3 way "T". One port went to headlight switching and HVAC controls, one port went to A/T Modulator valve, the 3rd fead the CC. Just cap off the CC port. There is one hose of the CC that had the wires from brake switch wrapped in vinyl tape that unless you pop the rubber grommet out of the firewall or just flush cut it it might just have to remain tucked away someplace?
What to do with vacuum lines.
