O ring
on the pickup sump pickup tube was allowing air into the system and causing low oil pressure at idle. Nearly $4gs to figure this out. I have a major problem when I can't communicate directly with tech. This whole thing could have been aleviated had the deskjockey told the tech exactly what the truck was doing when it was towed in.
End result: dealership ate initial charges and gave me a decent discount on a replacement engine....new engine= 24 months, unlimited mileage warranty. Truck won't be parked for 2 years, lol.
