Many cars have the diagrams for vacuum hose routing on a sticker somewhere either on the underside of the hood or in the engine compartment somewhere. If none exists, you'll need a manual for the car to see the complete routing.
www.autozone.com has vacuum hose diagrams for all vehicles.
vacuum routing diagram can be found under the hood. if that is not an option try a haynes or chiltons manual
You can find the fuse box diagram for the Buick Riviera online at places like auto-wiring-diagram.com. You can also find this diagram on the website called Team Buick or in the Buick Riviera owner's manual.
A 1995 Buick Riviera wiring diagram can be obtained from most Buick dealerships. The wiring diagram can also be found at most auto-parts stores.
GM service department has master wiring and hose diagrams on hand. Ask nicely and you might get a free copy.
Under hood diagram or autozone.com
Leaky or disconnected vacuum hose ?
Get the schematics from MOTORLIT.COM.
need a 2006 buick lucerne belt diagram
A free vacuum diagram for a 1996 Buick Regal can be found in its manual. It can also be obtained at an auto part store, as a print off.
Possible vacuum leak.
Buick Riviera was created in 1963.
there arent many diagrams on the net. go to your local buick dealership . they will gladly print you one out for free.