Oil pump driveshaft (also referred to as distributor) o-ring is bad. Replace, and oil will stop leaking there.
If the pump is leaking or noisy then assume it is failing.
The oil pump is found on the bottom on the 1995 Chevy Lumina's engine. It is mounted on the front of the crankshaft
the pulley is a press fit on pump shaft. need puller and installation tool to install. JOE
Leaking around water pump mounting or shaft Play in shaft
Water pump shaft loose? Water pump leaking? Water circulating in coolant system?
UiDoes it have a relay bitten for fuel pump
possibly the water pump
Remove the belt from your 1992 Chevy Lumina water pump. Remove the water pump return hose. Remove the water pump retaining bolts. Reverse the process to install your water pump.
Remove the belt from your 1994 Chevy Lumina water pump. Remove the water pump return hose. Remove the water pump retaining bolts. Reverse the process to install the new water pump.
Depending on which end it's coming from, you probably have either a leaking tailshaft at the PTO gearbox, or a leaking input shaft seal on the hydraulic pump.
in the gas tank
In the fuel tank.