Hi, not sure if this is where to post this question, but here goes, I am restoring an 1987 chevy c-10 350.. My defroster does not work, but I have heat. I have located what appears to be a small vacuum line coming out of the right side of the firewall, this line connect to a switch on the inside of the cab on the heater plenum, can anyone tell me to what do I attach this vacuum line.
Post by Pontiac1976 on Mar 30, 2011 18:29:25 GMT -5
I will take a stab at this it most likely goes to one of the Vac ball es in the Kick panel the one of the heater housing door to open and redirect the heat to the windshield . But some pic's of it where it is close to might help more.