Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello I will help you with your question,
You are looking at the passenger compartment side?
That is the vacuum to run the door motors on the heat/AC system. YOu should have a controller mounted near the heater box to the right that it connects to?
There is a vacuum reservoir that is on the right side of the heater box, you should have a line from the firewall to that reservoir and one from the reservoir to the controls.
Let me know what I can do to help you with this