Ress - There is a customizer here in Nebraska that installs after market products like air conditioners, running boards, wind deflectors, grille guards etc. Went to the Chevy dealer first and they would install the different rear view mirror for around $350. These mirrors are optional on certain SUV's, Pickup's etc. Went to Jones Automotive here in Nebraska and had the swap done for $299. A little pricey, but once you have one - you really learn to like it. Many times am running the air conditioner un-necessarily or need to slow down as the wet highway is approaching freezing conditions. Usually can keep my directions straight until the sun goes down and I am on winding roads in a mountain valley. Then a compass is very handy.
You could do the install yourself and order the mirror from the Chevy dealer or even JC Whitney.