I have two transmission code on my 2015 gmc seirra, P0700 and P0741. I had an appointment at the dealership 2 weeks ago and a day before the codes went away. I bought it there anyways thinking tbe codes are stored, all they done was a fluid change, which I needed done anyways. The codes came back yesterday. So basically what the truck is doing is sometimes the rpms run high before changing . It seems it happens when the truck warms up. I done some research and could be several things between dirty fluid, wiring, and transmission control module ( tcm) , solinode value. Just wondering if anyone came across this issue, thanks in advance. Any help would be appreciated