Its funny how certain things get to people differently. Mirror extensions are one of those things for me. Maybee its because I never had a really good set. I have sliding trailer mirrors off of a 2007 gmc truck on my yukon so all I have to do is pull them out. There were some programming issues to make the mirrors work. Had to reprogram both door modules and bcm and I lost the memory mirror positon function.
2016 GMC Yukon SLT