Omfg! It's in the crankcase and you ain't changeing that one yourself!
The oil pump is found on the bottom on the 1995 Chevy Lumina's engine. It is mounted on the front of the crankshaft
Drain the oil from your 1995 Chevy Lumina oil pan. Remove the oil pan retaining bolts. Remove the oil pump retaining bolts. Reverse the process to install your new oil pump.
Oil pump driveshaft (also referred to as distributor) o-ring is bad. Replace, and oil will stop leaking there.
Inside the oil pan
Your oil pump is bolted to the crankshaft. You have to take the oil pan off the be able to get to it.
In the oil pan
Inside the oil pan.
Drain the oil from your 1996 Chevy Lumina oil pan. Remove the oil pan retaining bolts. The oil pan will come off.
Says it on the oil cap.
Check your oil and make sure there is some there. Actually it could be low oil pressure from lack of oil or from a bad oil pump
may need an oil pump may need a motor
A 1996 Chevy Lumina transmission will hold four and a half quarts of oil. A 1996 Chevy Lumina will also hold 12 quarts of transmission fluid.