Oil pressure sensor
hope these help, they are 5.3
click images to see them
It's a sending unit but they also call it a switch because if you lose all oil pressure it shuts off your engine
Looking for a Used Suburban in your area?
CarGurus has 22,040 nationwide Suburban listings starting at $2,300.
Search Chevrolet Suburban Questions
Chevrolet Suburban Experts
Related Models For Sale