My renter has a 2016 Chevy cruze.. Yeah.. not my cup of tea so to speak.. it was overheating. Me and my buddy replaced the things that were leaking like the overflow tank and hose.. no joy.. thing would not open the thermostat... Ok... new thermostat. everything seems good.. for about 10 miles the gage is right where it should be then wham.. full on overheat.
My thinking at this point is that it is the radiator? Plugged or partially plugged?
I let the thing idle in the driveway for 50 minutes. the gage never moved a 1/64th of an inch once it reached temp.... drove it to check... 5 miles of driving around and it was overheated.