From the manual: "Replace engine air cleaner filter (3)"My 2013 cruze is now 4 years old and I have 19,700 miles on her. Figured she'd need an air filter by now. To my surprise the manual says 72,000 is when the air filter needs replacing. Then I saw 150,000 is when the coolant needs flushing/change. At 10k a year that would be 15 years before you change the radiator fluid. I'm not waiting near that long.
On the next page: "(3) Or every four years, whichever comes first."
Likewise, the cooling system is flushed every 5 or 10 years depending on which schedule you're looking at.