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Looking at a tire chart, it appears that your 305x35x20 have a diameter that is 2" greater than your stock tires. Assuming that you're still running the stock front tire size, the larger rears are now turning fewer rotations than the fronts at a given speed and the computer thinks you have other issues.
Looking at a tire chart, it appears that your 305x35x20 have a diameter that is 2" greater than your stock tires. Assuming that you're still running the stock front tire size, the larger rears are now turning fewer rotations than the fronts at a given speed and the computer thinks you have other issues.
Assuming that your avatar represents your car, I have to believe that your car is heavily tuned...with that said, you should be able to change the tire size in the ECM to more closely represent what you have. If your fronts are 26" and rears 28", I would try entering a new tire size of 27" to average them to see if that does the trick...
Some of my G8 GT friends would simply pull a fuse that was tied to the stabilitrak to make it go away, but I'm not sure if the C7 is setup the same way.
Need some help
