jgaudet

I have a 2022 GMC Sierra refreshed model with the 5.3. I have installed a lift kit with 325-60/20 tires and 10 inch rims. They haven't been able to unlock the computer in these trucks yet so I'm unable to calibrate my speedometer for the bigger tires. It reads about 4kph higher now and I thought it was going to add extra kms to the odometer. But I tested it out and it's not adding extra kms it's the exact amount when I tested it. Just wondering if maybe it doesn't go by the wheel rotations for this truck now?