1995 Opti vacuum lines
Basically looking for point a to point b connections along with the check valve. I am still searching for the GM book at a decent price and my simple generic 84-96 repair manual doesnt have enough detail.
Now assuming the 95 has the same vacumn harness as my 96, the small hose runs directly to the rubber intake bellows between the air cleaner and throttle body; the large hose runs to a filter and then to a check valve and then to the intake manifold. the filter and check valve, if OEM are unavailable, generic A/C parts are the same thing; for a filter I actually used a very small fuel filter which worked quite well.
My own original vacumn harness failed because the inlet hose to the opti got cut by the serpentine belt and the soft factory rubber hose leading from the opti to the intake manifold absorbed oil from leaking seals on the timing chain cover and collapsed onto itself.
In either case you can make your hoses slightly longer and route them away from potential damage and substitute more durable fuel hose for the soft OEM hose.





