Mine broke there too. There’s not a lot you can do. Plastic is subject to engine heat, pressure from clamps, & heat of the coolant inside.
Just bought one. Will hang onto it to replace the next failure in one of my two 2016 Cruzes. First one failed at 93,000 miles. The other hasn’t had any problems with that, but it only has 30,000 miles on it.I have not but this will fix your problem:
The Racer X Fabrication coolant neck for the 2012+ Chevy Sonic 1.4L, 2011+ Chevy Cruze 1.4L and 2015-2019 Chevy Trax 1.4L is a direct replacement for the OEM coolant neck. If you have ever found that you have become stranded in the middle of...racerxfabrication.com
50,000 miles is pretty good for a plastic water outlet.