Before installing the new battery did you clean the area around the battery, including all the terminal connections? If not you are probably looking at leftover from the old battery.
At 106*F your no load charging voltage should be no greater than 14.2V, 15.17V is way too high, you are overcharging, sounds like your field transistor is partially shorted.
If this were true then we would never see our in-car voltage meters showing 14.6V. Mine routinely shows 14.6V in the middle of the summer and I have seen 15+ volts on rare occasion. The Cruze has a variable output alternator and it will indeed output 15 volts when called for. My car was assembled in Oct 2011 and it's still on the original battery after 100,000+ miles.
Start by doing as Robby suggested and get the battery replaced under warranty.
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