Oldsmobile/Buick Repair: vacuum hose diagram, vacuum tank, vacuum leak

Question
Where can I get a vacuum hose diagram for a 1995 Buick Regal Limited, 3.8L engine.  My heater/AC is acting up.  When I step on the gas, the airflow goes to the floor and defroster, even when I select vent.  It seems to be a vacuum leak, it gets worse when the engine is hot.

Answer
Hi
I cannot find a vaccuum diagram. The hose goes off the engine, close to the throttle body. Around the brake booster and then along the drivers side towards the front. It attaches to the Vacuum tank resivoir, behind the inner fender in the FRONT of the left front wheel.
The other side of that tank line then goes back up through the firewall with the wire harness and attaches to the HVAC controller.
If you can just follow the line and listen, you MAY find the leak, it'll hiss.
The tank can have NO holes.
JUST advice from experience
I Hope this helps
Good Luck
Pawl