I have a 99 dakota R/T and i'm in the process of replacing my heater core. I have installed the heater core and put the lid back on the box. There are like 7 to 8 vacuum lines that run on top of the box. I have them all mated up execpt for the black vacuum line its broke off. Its not the black line that comes out of heater box, that goes through the firewall, I know where that one goes. The DIY thats on here doesn't really show me a good picture. If someone knows where it goes or has a picture it would be helpful. thanks