Envoy 2WD V8-5.3L VIN M (2005)
Oil Pressure Regulator Valve: Service and Repair
Valve Lifter Oil Pressure Relief Valve Replacement
Removal Procedure
1. Remove the oil pan.
2. Remove the oil transfer tube bolts (435, 446) and gaskets (445, 448).
3. Remove the oil transfer tube (447).
4. Remove the displacement on demand oil pressure regulator valve (1) by pushing downward.
Installation Procedure