I recently purhased a 2003 CTS with 43,000 miles. The odometer is reading about 10% fast. I have verified it using several different methods. The tires are standard size so thats not the problem. Has anyone else experienced this? I haven't taken it back to the dealer yet, thought I would see if this is a common problem for this vehicle before I go back.

Chad

 

my guess is the previous owner changed size tires and adjusted the odometer
gear/sensor to read correctly.

now, it is your turn.