You will have to drop the oil pan to access
Remove oil pan
pull the distributer out then usuing a tool and drill reach down in that hole and spin the drive shaft of the oil pump.,
6 with a filter change.
To change the oil pump on a 1972 Pontiac, first disconnect the battery and drain the engine oil. Remove the oil pan by taking out the bolts and gently prying it loose. Once the pan is off, unbolt the old oil pump from the engine block, replace it with the new pump, and ensure the pickup tube is properly aligned. Finally, reassemble the oil pan, refill with oil, and reconnect the battery.
6 Quarts with filter change
All car engines have an oil pump.
You will need to drain the oil from your 1997 Pontiac Grand Am oil pan. Remove the oil pan retaining bolts. Remove the oil pump retaining bolts. Reverse the process to install the new oil pump.
the oil pump is located inside the oil pan housing.
To change the oil pump on a 2002 Pontiac Montana, start by disconnecting the negative battery cable and draining the engine oil. Remove the oil pan by unbolting it from the engine, which may require removing other components for access. Once the oil pan is off, detach the old oil pump from the engine block, install the new oil pump with a new gasket, and reassemble the oil pan. Finally, refill the engine with oil, reconnect the battery, and start the engine to check for leaks.
A 400 Pontiac engine typically holds about 5 to 6 quarts of oil, depending on the specific model and whether a filter change is included. It's always best to consult the owner's manual or specifications for the exact oil capacity for your particular engine variant.
Oil pump change