Delayed Shift on LML
So I have 25k miles on the truck, and it's only been tuned for about 3,000. Today I noticed when I started the truck up and was trying to pull out of a parking space, it was taking several seconds for it to shift from reverse to drive. I played with it a little in the parking lot, and it did it consistently. Once I got home, I tried it again and it was fine. What I am worried about is, I had a car that did something similar, slipped until the fluid built up, then ran ok, but the tranny then went out not long after.
I am REALLY worried that there is something wrong and I JUST tuned the damn thing, so I find it hard to believe that it was a tuning issue, but you know they automatically void the warranty (even though that's a federal law that they can't auto void it).
Any suggestions, thoughts or advice?
2011 2500 GMC Denali
H&S XRT Pro Tuner