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Old 02-26-2017, 09:26 AM   #184
travislambert

 
Drives: '17 ZL1
Join Date: Jul 2016
Location: Fairmont, WV
Posts: 1,567
So installing the ZL1 1LE wheels and tires looks like it's going to make the speedometer off by about 4 percent. So for every 100 miles you drive, your car logs 104 miles.

I've been reading and it looks like many folks have asked dealerships to re-calibrate for different tire sizes and have been denied. Obviously HP Tuners can make the change, but most people probably won't want to void their warranty for a speedometer correction.

I know about the Magnuson Moss Warranty Act, but does anybody know of any official statements from GM addressing speedometer calibration?
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