MakoShark77

I have switched to an A/C delete setup and I'm having trouble figuring out the routing of the vacuum lines from the control module on my 77. The vacuum canister to the far left is Heater/Defrost. The canister to the far right is the Outside Air vent. What is the canister in the middle for? My AIM shows and A/C delete setup, but does not show a connection to this middle vacuum can. I'm confused

MelWff

this is for a 76 but may help
http://willcoxcorvette.com/instructi...ROL_VACUUM.pdf

MakoShark77

I think I figured it out. My guess is the A/C delete Vettes didn't have the hot water shut off valve out under the hood. Instead, the vacuum can in the center of the pic is used to shut off the hot air flow in to the cab. If I put my finger into the hole next to the can I can feel a door rise when vacuum is applied to the can.