I have a 2014 that is about 5 years old now (since manufacture in 2013) and I finally had my first issue.
On Halloween (OOOoooOOoo!), I get in the car after a couple trips earlier in the day when I realize I am getting the message that roads may be icy. Low and behold, the external temperature reading is a lovely -31°C. However I am in a t-shirt, so I realize either my car is broken, or I am! Wait a minute, my GOM shows not a single green tic tac of charge left with "--" as the number, and everything is reading in metric now! I enjoy my science as much as the next guy/gal so I figure I can give it a go, but I realize I will probably need my range estimation back. Further, I'm apparently in need of washer fluid. What a conundrum.
"What could be causing this?" I ponder.
"Eureka!" I exclaim as I recall the many threads about 12V batteries being the root of all evil. So I grab my voltmeter to check the voltage when off: 12.90 volts. Hmm, that seems normal and I don't have a battery tester, but it's probably time to change it anyway.
I call the dealer (City Chevrolet in Charlotte) to ask about the LN1AGM battery (again found on this forum). They don't even have it and can't get it! Instead, they recommend a standard lead acid battery instead of AGM that won't even fit! So I called AC Delco and they gave me a distributor in Charlotte I could get it from and the guy only charges $150 for it, which is the best price I've seen for it (for TheLondonBroiler: it's Battery Service on 24th St).
I swap the battery in the parking lot, and all my issues disappear. My wife and kids even love me again!
Anyway, just a quick story with the same resolution: Having some quirky problems that seem like your car is dying? Don't worry, it's just the 12 volt!