How to change the tail light on Cadillac CTS 2003-2007

This is how you can change the tail light assembly on your Cadillac CTS. The repair process we show you should be similar on CTS models made in the years 2003, 2004, 2005, 2006 and 2007. In order to make this replacement you will need a 10 mm wrench, or a socket with a ratchet….