[Berg]

I don't know if you did anything about this issue yet but you could always try running 15w-40 Shell Rotella multi-grade diesel oil. I run it in a few of my older gas engines that have a whole lot of clearance on the bearings and it makes a world of difference. Nothing will make up for mechanical damage, its a shame you couldn't have just shut it down when the oil pressure dropped off. Believe it or not, I have 2 similar trucks, one is a 96 K1500 Suburban with a 5.7 and the other is a 99 K2500 Burb with the 7.4. Both of them are high mileage and have some noise on start-up. No death knocks but once they both run for about 3 minutes everything is OK