2014 Tahoe- speed correction and gas mileage
Spent one and a half weeks with super chips trying to figure out why the speed correction does not work on my Tahoe. Still no resolution so I bought a hypertech. Now gas mileage did not work either. I know the shift points changed because it was shifting much harder but saw zero increase in fuel mileage. This is not the turner for new GMs. Maybe for other makes or models.