If you are asking about the oil drain plug, Then slide up under the engine and look at the bottom of the engine and that will be the oil oil pan and you will see a drain plug in the back bottom side of the oil pan. Take it out.
5 QTS. with new filter.
5qts
SAE 10w30 any major brand.
10 w 30 over 75000
75w or higher gear oil
The oil pressure sensor on a 1988 Chevy 1500 5.7 is located on the engine. It is on the right side, near the intake manifold.
5-30 in the summer is recommended. If you have the money I would run a Lucus oil stabilizer.
Underside, near oil pan.
For a new or rebuilt oil pump for your 1988 Chevy Celebrity 2.5L check with an automobile parts store.
I have one in my 1988 Chevy K1500 with a 350.
I have an 1988 Chevy S10 w/2.8L V6 and it uses this oil filter.
Place a drip pan below the oil pan in your 1988 Chevrolet. Remove the oil pan plug. Allow the oil to drain out. Put the plug back into the bottom of the oil pan. Fill the motor with new oil.