Truck has 48,000 miles. When ever not running has been in garage.

Oil pressure gauge reads between the M and A in NORMAL on the gauge. When RPM drop down to about 1200 gauge flutters and falls down. When at a complete stop gauge drops outside of the low mark.

This does not happen all the time, just randomly. I replaced the sending unit. Same results. Engine never sounds like low oil pressure. Runs as good as a 3.0 can-----.

Is there a location other then the oil sending unit to tap in for a mechanical guage?

The brake and ABS light comes on randomly also. Maybe it has ghost!!!