Well that is above the posted legal speed limit of any highway, so that could be one reason. Manufacturers are not going to make it so cruise control will stay active at a speed it feels is to fast. My wifes G6 she used to have cut off at 75, and you had to drop below 70 before it would re eneable.Any idea why the cruise control would kick off above 90 mph?
There are 85mph speed limits out west by utah.. So not far fetched