what will cause a drop in oil pressure
Low oil level, dirty oil, stopped up oil filter or bad oil pump to name a few.
change oi and filter after running flush through it. Pressure is only about 30 psi instead of 40 psi
30 psi at an idle?
Looking for a Used Silverado 1500 in your area?
CarGurus has 159,917 nationwide Silverado 1500 listings starting at $1,995.
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts