What is the normal oil pressure of a 1999 Chevy 2500 4x4 Silverado with 6.0L gas engine?
The normal oil pressure for a 1999 Chevy 2500 4x4 Silverado with a 6.0L gas engine is between 35 and 45 pounds per square inch (psi) at idle. When driving, the oil pressure should be between 45 and 55 psi. If the oil pressure is low, it could indicate a problem with the oil pump, the oil filter, or the engine bearings. If the oil pressure is high, it could indicate a problem with the pressure relief valve or the oil filter.