Today I am scheduled to pick up my brand new 2021 Silverado 2500HD High Country. I currently own, and am trading in a 2016 1500 Z71. I have owned a few pick ups, mostly Chevrolet, and all gas engines. I am familiar with diesels from my work experience, but this will be my first one now that my business needs call for something a bit bigger and stronger than a half ton. I am, of course, excited as heck. What are some of the first things I should be doing/thinking about? Any tips or things I should know? Should I be keeping it under 55 on the way home?