2004 CTS Cadillac front passenger turn signal bulb is out.

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

The main fuse box for your CTS is located under the hood. This video shows where to locate it https://www.youtube.com/watch?v=l9-OcTxt-Cw and this site shows the diagram with the fuses and relays https://automobilediagram.com/cadillac-cts-2008-2013-engine-compartment-fuse-diagram-cts-coupe-and-sedan we hope this info helps!

Try replacing ALL directionals for the side that is not working properly. That fast blink in the back usually means bad bulb, but could also mean bad relay.

Can you elaborate? You say emergency flashers work, but FR directional does not. Does the bulb-in-question light when the E-flashers are going?

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.

The fender liner needs to be removed. It takes the removal of up to 20 plastic pins. Once it is out of the way the bulb sockets become available. twist the bulb socket counterclockwise and the bulb can be pulled out. Reverse order for reinstallation

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.

Are you sure you replaced it with the correct bulb?also look at the connector and see if it looks burnt.If it does then replace it and when you replace the bulb add die electric grease to the contacts.This will keep the heat down.Good luck and I hope this helps.

Remove 3 or 4 of the plastic pins holding the inner fender. They are located around the lip of the fender opening. The pins are removed by pulling the center cap of the pin straight out about an 1/8" and then wiggle and pull the whole pin out.
Pull the inner fender down and back.
Reach your arm in and grab the socket and squeeze the locking tab.
Rotate the socket counter-clockwise less than a quarter turn, and pull straight back.
Reach your other hand in and remove the bulb by pulling it straight out of the socket. It takes a 3157 bulb

changing the blinker on a CTS