the code is the Cr pressure relief valve code and this messing with my rpms and making my trany slip it seems like and threw the truck in tow haul mode and my tranny temp light came on can someone please help me

 

Sounds like you may have popped the pressure release valve. It's about $400 for a new valve. When you say in tow/haul mode, do you mean it seems like it doesn't have any bottom end or your losing power. Losing power would be a good indicator.