The oil pressure is fluctuating back and forth.
Your oil pressure fluctuating is most likely caused by a faulty sending unit. The sending units on 4.3 liter engine are known to fail. To be safe I would ask for help from a mechanic at YourMechanic to properly diagnose this issue to make sure it is not something more serious such as a mechanical issue with the engine.
Have a car question? Get free advice from our top-rated mechanics.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%