Procedure to change turn signal light bulb on a

KMTANNER is correct for the 2003-2007 CTS. For the 2008+ CTS, you need to remove the bumper. The bumper comes off fairly easy, but there are a 2 hidden screws. Look for the youtube video on removing the bumper. I have a 2004 and 2009 CTS. I did both.

replace the turn signal flasher very common it is underneath the driver side of dash find it by hearing and touching the clicking sound it makes when turned on

This is weird, did somebody working on the car?

I've got a 2008 cts. And I just checked the lights...None of the rear lights can be changed. NONE! I do not know where these people get their info from. The only light that can be changed are the HID, fog front turn signals and the DRL's!

I replaced the front turn signal bulb on my 2004 CTS. I removed about 4? screws holding the inner fender to the outer fender, just forward of the tire. Then you reach your hand in and find the socket. Twist the socket about a quarter turn to unscrew it and remove the socket. As I recall the bulb is pulled straight out of the socket.

Put it on, check Front Headlight/Corner Light and Tail Light, you might have to change a bulb, you'll see where the bulb is blown and replace it !

open trunk, remove the plastic panel around the latch plate, remove the plastic mounting bolts that hold the grey trunk liners in place, there are two 10mm nuts that hold in the light remove nuts pull out light twist the bulb retainer out and replace bulb.

Actually no you don't. Crank your steering wheel all the way to the right so yo have the maxumum clearance for your hands and arms in the front of the wheel well. Remove the plastic clips that hold the wheel well splash guard and pull it back enough to allow access to the interior of your bumper.
Replace bulbs as needed.
Yes, a jack is nice and makes it a touch easier to access, but I did this in an AutoZone parking lot during a cross country road trip.
5 mins tops to complete.

It is fairly simple to replace the turn signals on the CTS. You do not have to remove the whole bumper, just enough to let you inside behind the lights. Turn the steering wheels one way and remove the 4 clips around the bumper with a flathead screw driver. Then do it again to the other side. You can remove the top clips to give you more wiggle room. Look under the car and remove enough of the clips to loosen the sides. At this point you can stick in your hand from the wheel well and replace the lights. Just turn and pull and re-install the new lights. Simple.

changing the blinker on a CTS