As far as the vacuum schematics, I attached what I have below for your review. The first one is for the EVAP/emissions control system. The second is for the HVAC system.
Take a look through them and let me know if you have questions.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.