2010 GM Silverado 4.8 Cruise control not working

[sethrocon]

Hello, I flashed my 2010 Silverado and the tune works well but the cruise control isn't working. I have larger tires on the vehicle so I changed the tire size. The cruise control works no issues without the flash. Also the traction control light came on once and then went off. I'm not sure if this is related to the same issue.

Any thoughts?

[mikel]

Is the speedo correct?
I have never seen this to be an issue on a 2010 truck honestly.
Did you make any other adjustments when you loaded the tune?

[06MonteSS]

I have literally tuned several thousands of these trucks with bigger tires, and have never seen one where the cruise control didn't work after installing a tune...

if you install the preset tune as-is, do not change the tire size, does the cruise still work? and then after you change the tire size, it does not work?

something isn't right somewhere... if it only does it after updating the tire size setting, then it could be a problem with a wheel speed sensor or the ABS module....