My wifes 2014 Impala just had the turn signal light on the front of the drivers side mirror quit working. Wondering if there is a way to replace just that row of lights? I have searched everything I can find but am unable to locate anything on it. Ideas of where to order it if its replaceable would be great as well. Thanks in advance.

I have no idea on that one. A GM parts department would possibly be able to advise better, regarding available parts or service for replacement procedures.
Sir, I have also noticed that in your post "turn signal light" is a blue Amazon link and directs you to a VW turn signal light..not cool.
May I recommend you opt out of VigLinks to hopefully stop the unnecessary blue links.
https://www.viglink.com/opt-out/

Since I wasn't trying to be "cool", I will not worry about clicking on a link that I know nothing about that you have left. About the light, I am able to replace the light if it is one that can be replaced as I am very capable of automotive repair. My problem is that so far in my searches, all I have been able to find is the entire rear view side mirror assembly which is around $175 and up. Was hoping that someone on here had replaced theirs at some point and could point me in the direction of the light replacement.

Have you called a dealer to ask if the lights were available as a separate part for the mirror ?

Your post above contains no further links which is good news so far, I will remove your amazon link, these things happen.

Have you checked if there is power to the circuit that powers the light?

In GM (and others) it is more likely that wires are broken in the flex joint between the body and door than it is for the LEDs to fail.