I bought a '79 Malibu a few weeks ago and it's venting heat from the heater core all of the time from the floor. I found that the cables were not connected to the blend doors over under the dash by the passenger side door. I noticed that the previous owner didn't put a heater control valve in line with the heater core. I had a vaccum controlled one from one of my turbo buicks, and I wanted to know if it could be used. I don't see any vacuum lines coming from around the heater box anywhere to connect to the valve. Was the heater control valve in a '79 Malibu mechanical, meaning it had a cable? How does the control work in these cars?
Any help with this would be greatly appreciated.
Any help with this would be greatly appreciated.