2011 Chevrolet Equinox LT question

[2011chevyequinox]

Hi all. I own a 2011 Chevrolet Equinox LT. It's a base model.

I've been told the wiring for mirror turn signals is preinstalled, is that true? Can I just purchase side mirrors with turn signals and install them?

 

[SONNY88]

Above my paygrade, my 2017 doesn't have that