Back right led tail light wont work but all other lights in assembly work.

What is your question?

My back right led tail light on my 2006 cadilac won't come on but all other lights in the assembly do come on. The assembly works fine until I plug it up to my car. I checked all fuses already. Should I change out my turn signal at the steering wheel?

What makes this problem better or worse?

Nothing

How long has your 2006 Cadillac SRX had this problem?

A few weeks