16SierraAllTerrain

Hello everyone, I bought a 2016 GMC Sierra All Terrain brand new. From dealership it was supposed to be level. It was not. I added a rough country spacer to the front to bring it up level. After doing this I've noticed the upper control arms are uncomfortably close to the bump stops. I was wondering what the best way to fix this issue was. Aftermarket upper arms? If so what's the best product everyone has used to correct this issue it has the rancho adjustable front struts with the billet rough country spacer.

I started reading through this post but there's just too many pages. I was going to see if someone asked the question that I'm about to ask. Seeing as how pgamboa has lots of great information and seems to be the man with the plan so to speak. I have a 2016 Gmc Sierra All Terrain. I have theDL3 mirrors that power fold with heat auto dim memory features etc. I'm wanting to upgrade to the DQS tow mirror. Is this a plug and play option or is there some pins that have to be changed around in order to get the Amber's and cargo lights to function correctly?