This switch fits in the bezel and works for the following models and year ranges: Silverado 1500 2500 3500 and Sierra 1500 2500 3500 model years 2007, 2008, 2009, 2010, 2011, 2012 and 2013; Traverse model years 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, and 2017; HHR model years 2009, 2010 and 2011. OEM numbers: 20945129, 25789692.