You can find a vacuum diagram for your 1987 2.4 liter nonturbo engine in most service manuals. The service manuals can be found at your local library.
97 trans am vacuum schematics
I'm looking for a vacuum line diagram for a 94 grand prix
You can find a one line vacuum diagram for 1997 Nissan 1.6 liter engine in the owner's manual. You can also find it at various auto stores.
A 1997 four-cylinder Honda Accord vacuum line diagram can be obtained from most Honda dealerships. The vacuum line diagram can also be found at most auto-parts stores.
Wiring? Vacuum? BClear.
autozone.com has free online manuals
The Chilton Manual 20360 comes with all this information
You can find a free Ford F1 50 vacuum diagram at most Ford dealerships. Many auto-parts stores will have the vacuum diagram.
Which vacuum diagram The Underhood for the engine or the vacuum for the interior /AC system?
You can find a vacuum diagram for your 1992 Chevy Lumina at most Chevrolet dealerships. Chevrolet service manuals will have the vacuum diagram and can be found at most local libraries.
Under hood diagram or autozone.com
You can find the 1986 Chevrolet vacuum line diagram at most Chevrolet dealerships. The vacuum line diagram can also be found at most auto-parts stores.