New oil cooler is in!
After purchasing a CTS monitor I found my delt'a running 26-28* over coolant temp.
I had a new oil cooler installed, thermostat and cleaned Turbo. Truck runs excellent with Delta's 10* over now at 65 MPH.
Warranty paid for thermostat, all gaskets and half the labor. For what ever reason warranty did not pay for cooler?
Ended up costing me $800
Also changed the oil, changed and flushed the trans fluid and changed filter's and I also put a Sinister coolant filter on, have an EGR block spool and cat out. I think I need new charge air boot's though the truck has 85K on it shows 21-22 LB boost and has oil residue on the boot's.
I hope I am good for a while!!!