Quote Originally Posted by Seanlb7 View Post
I have a 2001 chevy 2500HD with the LB7 duramax, one day the check service engine soon light came on and thw truck wont excede 2000rpm, please let me know if the JK tune will fix this issue
Welcome aboard!

Much depends on why. If the SES lamp is on, there are DTC's stored. You need to read the codes to find out why it limped. It may be a simple matter, or it could be serious. No knowing without the codes.