Cadillac CTS front inner turn signal bulb size 3157, front outer turn signal bulb size 12961, front turn signal bulb sizes 12188, 12272NA, and 3157, plus rear turn signal bulb size 3157. The replacement chart covers vehicle production years 2003 through 2013 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.