The tail light housings of a tenth generation (2014, 2015, 2016, 2017 & 2018) GM Chevy Impala contain the combination brake / rear turn signal, reverse and parking light bulbs. Check out my DIY instructions for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2014-2018 GM Chevy Impala Tail Light Bulbs Replacement Guide