2004 Chevy Trail Blazer LT

Purchased this from a Grandson to help purchase another vehicle. It had a miss which I Fixed by replacing 2 coil packs and replacing the valve cover gasket to keep oil off of the plugs. The battery was 5 years old so I put a new one along with a starter. It starts and runs fine and then all of a sudden the oil pressure drops to zero. I decided the engine needs an overhaul and don't have time to pursue that. my loss is your gain. The left passenger door is dinged, but opens and closes fine.