One problem related to radiator has been reported for the 2016 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2016 Chevrolet Impala based on all problems reported for the 2016 Impala.
The left side (radiator side) catalytic converter develops hairline cracks and eventually breaks from the flange attached to the engine. If it breaks, it falls forward and gets caught in the fan, possibly causing further damage. Appears that cracks develop due to lack of strength from thin metal and possible stress of weight at given point, which if unnoticed, the converter will break.