The driver’s side brake light and turn signal lights are not working?

There are many fuses that run the system which need to be checked because the lighting systems are run by the BCM, here is a guide to help and I have included the fuse location as well. If all fuses are good, I would check the ground (g400) for the bulb socket. Here is the blinker and brake light wiring diagrams so you can see which fuses to check plus a guide to help check the ground.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

If the fuses and grounds are good the BCM could be out but to be sure let's do a CAN scan. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

If it comes up with e code for the BCM you can get a preprogrammed unit by searching Google or Ebay. Here is how to change out the BCM as well. Check out the images (below). Please let us know what happens.