Hey guys, I know you all will know the answer for this one. Is there a way to calibrate my speedo? I have a 2004 lb7 4x4 with 35 inch tires. My buddy Eric says that you cannot calibrate your odo or speedo, I know that various programmers have tire size inputs but he says its for shifting points and performance reasons. Do I have to live with inaccurate speed and odometer readings forever or what ?????? Thanks Big T. OUT !!!!

Buy a Hypertech or Predator. These are just two that will adjust tire sizing and correct your speedometer.

Thank you sir !!!!!