So this happened back in December while pulling my trailer up a grade in California the computer says Engine Power Reduced and it literally goes to a crawl.....I took it to the dealership to diagnose the problem and they said it was the Turbo Charger....I took it to a mechanic not wanting to spend the 5k the dealer wanted and the turbo was replaced...6 days after getting it back the same thing happened and he said the new Garrett turbo was faulty and full of oil so they replaced it......2 weeks later again pulling my trailer it does the same exact thing so I take it in after the weekend with my trailer so the mechanic can hook up his computer so we can drag the trailer around until it does it again which it does and it shows the veins are 100% open...he cleans out the manifolds and says that was the problem....I tested it again sunday pulled my trailer up this steep hill by my house twice with no issues so go back to my house shut the truck off and load my bikes and gear back in the trailer and head out to take it back to storage...getting on the freeway going up the ramp it shuts off again with the same problem so I lim it to storage shut the truck off for 10 mins unhook and then get back into the truck and all is back to normal and full power.....Now the previous times it sat for 6 hours and was back to normal, sat all of new years weekend and was fine and this last time 10 mins and it was fine...all of these have happened under load with my trailer behind it....I am 4k into this and I am still having the same problem so I am asking if anyone has any ideas?
This is a 2008 LT 2500
Stock other than lift and tires