The oil pump is inside the engine under the oil pan.
It's located inside the oil pan.
in the oil pan
where is oil sending unit located on 2003 chey impala 3.8 liter
Any engine that the 03 Impala came with takes 4.5 qts.
Low or no oil pressure.
The oil pump is the the sump.
the promblem is the oil pump.
Remove the oil pan. The oil pump will be visible. Remove the oil pump pickup to. Remove the oil pump retaining bolts. Reverse the process to install the new oil pump.
The 2007 Chevy impala takes up 5 quarts of oil.
It means you may be low on engine oil or need a new oil pressure sensor or worse a new oil pump.
It is either time for a oil and filter change or the engine is low on oil.
Listed in detail in your owner's manual. Don't have one then you need to get one.