Hey I am trying to get some advised on my truck I am going to be selling this month. I don't want to cheat myself but at the same time I'd like to sell in the not so distant future. Any advice I will appreciate.

-2015 Chevy Silverado 2500 HD LTZ
-Duramax/Allison
-Lifted
-Lux and safety package
-Charcoal color
-super clean inside and out
-mostly highway miles pulling small trailer @ 66000 miles
also I'm painting the side steps white or black in the next couple weeks(hard to sell it with pink haha)