My 5.3 vortec lost 20lbs of oil pressure and his a lifter tap
Have the oil pressure verified with a manual gauge. How many miles on this vehicle?
you need to find the one and look at the travel up and down of the spring / rocker arm..lifters and cams go out pretty quick..
If you have lifter noise then for sure the oil pressure has tanked, now you may need a new oil pump or something has happened internally with the bearings, too much clearance.
Looking for a Used Silverado 1500 in your area?
CarGurus has 11,389 nationwide Silverado 1500 listings starting at $4,500.
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts
Related Models For Sale