My father in law has a 2014 High Country Silverado, 5.3, 4x4. He went from 265/65/18 to 265/70/18 and I'd like to correct his speedo for him. I've corrected a number of speedometers on LS1B vehicles but never something this new. I don't want any issues partly for the obvious and partly because we're in Maine and he will have a 12 hour drive home at the end of the week.

Just looking for any clarification on this. Does it work the same as the older vehicles? Simply use the speedo correction tool and apply? Will this adjust shift points or just the speedometer?

Thanks!