I have a 2015 XL Denali with the 8 speed trans and 6.2 motor. Recently my dealer had to completely clear my transmission and reprogram it manually (long story). Now when I am cruising at 75mph on the freeway the motor seems to be revved up to high. At 75mph on the tach I am at the last line before 2k. Can someone with the 8 speed check their RPM when they are on the freeway today. I need to know if that is too high or is it in my head. I would greatly appreciate the help. Thank you.