It's the iss in the transmission. We changed it and had a hp tuner hooked up while driving and the rpm goes to zero for over 5 secs and sets the code which puts trans in maximum pressure. I'm think ints a wire problem. I would like to have iss turned off with tuner. I live in Zephyrhills to
I have a 2006 denali code po o717 internal speed sensor replaced and shifting solenoids replaced. I like to turn off po codes. I see your in zephyrhills any chance you can help me out know problembuyingvin access. I have a hp tuner but fromwhat I understand only a ef live tuner can do this.