1995 doesn't have a mass air flow sensor.
Based on the symptoms, I would check for a leaking fuel pressure regulator and/or nut kit (internal fuel lines). This can sometimes be noticed by a fuel pressure test. Fuel pressure should be tested with the key on, engine off. After the initial prime, look for an immediate leak down.
You can also do a visual inspection by removing the Vortec cover and IMTV from the top of the plenum, and looking inside for washing or puddles of fuel. The entire thing should be black, if you see any shiny spots, that is a sign of fuel leakage. Shiny golden spots on the driver's side indicate an internal fuel line (AKA Nut Kit) leak. Shiny golden spots on the passenger side indicate an FPR leak.