One problem related to brake light has been reported for the 2015 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Chevrolet Impala based on all problems reported for the 2015 Impala.
Brake lights gaskets are faulty from the factory and allow water to fill the trunk when it rains. Which leads to mold and mildew smell throughout the vehicle. Gm has produced a gasket that is "thicker" and corrects the problem but refuse to issue a recall and dealer says its not covered by warranty. I've spent hundreds at dealerships trying to find find cause of the water.