Supposedly this is it.
We just got our sonic, so no issues yet with that, but was looking and found this.
Guy showing how to remove the stock shift knob in a cruze, but looks like one for the sonic.
https://www.youtube.com/watch?v=M1MJSwylBTk
Would one of these work as a replacement?
Black White Rally Stripe Shift Knob Automatic Adapter for Auto Gear Shifter C | eBay
Just remember reading about this and thinking maybe this will help someone, we have warranty until 75K so we are covered for a while, but I know others aren't as fortunate.