Great content right here.
thank you all.
going to flush with distilled many times, then get in the elc...
Just be aware that simply draining and refilling has proven to not be enough on the 6.0ls... When you drain and refill and drive you only allow more sediment to be pushed into the oil cooler potentially clogging it more/making things worse. Rarely does the old way of drain/refill work on a 6.0l hence most having to do it more than one or replace the oil cooler afterwards. I would look into a diy or preuilt backflush kit just in case Its not any harder than the work involved with draining and refilling the system and if you don't clean the system out right the first time you can research it yourself here. Its not uncommon for 2 oil coolers to be replaced all because the system wasn't full cleaned to begin with. Happened to me on my first 6.0l and THOUSANDS of other threads here show the same. My second 6.0l I was way more prepared and actually saved time and money by just doing it thoroughly and right the first time.
Best of luck on the drain and refil i really do hope it helps but just be prepared if it doesn't help or it gets worse down the road. The coolant systems in these truck are infamous for driving folks nuts all because it wasn't thouroughly done right the first time.