Originally Posted by
kjhallex
Hey, looking for some advice on calibrating the speedometer on a 17 Silverado. Anytime I try to make a change to correct the speedometer the cruise control will quit working correctly. The speedometer will read correct per my gps but anytime I try to set my cruise at anything above 61mph it will not set. I've attatched a stock tune and the tune I'm using when the cruise will not work. Any advice would be appreciated! I have also emailed support about this issue.
Tire size is a 35 inch tall tire and factory gearing