All car engines have an oil pump.
The 1995 Pontiac Firebird V-6 engine oil pump is located on the bottom of the engine. The oil pan will need to be removed in order to see the oil pump.
the oil pump is located inside the oil pan housing.
Loook in your owners manual, I use syntheric blend 20w50
4quarts
take the oil pan off the engine and then unbolt the oil pump from the engine.
About 4 and a half quarts
10w30 motor oil should work nice
Many timing chain tensioners use oil pressure to operate as well as lubricate the chain. So oil pump failure and timing chain bind can be related. This car has a spring tensioner that does not use oil pressure. Your problem was most likely a clogged oil pickup screen. This will starve the pump. You need to change oil more often.
Someone put it there.
either 5w30 or 10w30 will work well.
inside the front cover.
Most cars hold 4 quarts of oil , plus the filter holds about a fifth quart. If you drain the oil, try adding 4 quarts and check the dipstick.