Another update -
Truck came back today. They did 2 lifters, the solenoid valley pan thing that controls the AFM lifters, Head Gasket, Oil Change, and Push Rod.
Was speaking with the tech and he's concerned that I also have an injector failing. He said my one fuel trim is at 18% and typically he likes to see plus or minus 5% of 0.
My concerns are - injectors aren't covered under my extended warranty/powertrain. Second concern is that I just ordered my Autocal and if I have an injector issue obviously I'll need to sort that out before I get it tuned. While running in the shop it actually came down 2%(to the 18%) so maybe the truck is just un happy that everything was apart?
What is everyones thoughts and or suggestions at this point?