What is the best way you have figured out to black out just yellow lights on the front of your trucks?

Also - side mirror covers, who has found them in black or paintable?

 

If you mean the amber lights, there is a long write up posted as a sticky over at gmfullsize.com telling you how to remove the amber lenses and reassemble the stock lights for free. I would do that.

As for the mirror covers, you can buy them in black and swap them out. The come on the Z71 tahoes and i believe a couple other trucks too.