Tuning wifes Tahoe with HPTuner today, was logging and saw 1 cell -33 @ 4400rpm. Just about shat myself when I saw it. Must have been a fluke cause after doing another log it was fine. Her Tahoe is all stock, but a little tuning made it wake up some. She wants shifts to be soft like stock. After riding in my truck with tire barking 1-2 shifts, her ride shifts too soft.
Still learning..........

 

It might have been a communications glitch. I would blow it of.