The sending unit is probably bad, not unusual.
engine diagram of 1995 chevy astro vas
inertia
It's a GM
The fuel sending unit is the most likely cause. The wiring to the unit can go bad or the unit itself fails.
Behind the wheels, attached to the axle.
R-134.
what size of transmission goes on chevy g20 cargo van 1995
fuel pumps whine when they are going bad
`on the right side of engine in the center of engine
under the distributer cap
brilliant, the thermostat is backwards
The Fuel Tank is 27 gallons. I've had my 95 Astro van since 2000.