Other contributors have said "What component serves as both a cover for the bottom of the engine block and a reservoir for engine oil?" is the same question as "What serves as both a cover for the bottom of the engine block and a reservoir for engine oil?" If you believe that these are not asking the same thing and should be answered differently, click here
What serves as both a cover for the bottom of the engine block and a reservoir for engine oil?
Let's see. You provide no model, year, or engine size and expect an answer. You do list it under Pontiac but there are lots of Pontiacs. On some newer Pontiacs GM used a cartridge filter that is...