I have been looking at the manual for my 2015 Silverado, and had a few questions concerning the intervals and warranty. One schedule doesn’t mention transmission fluid change, but the severe does. Without getting into if the changes are worth it or not, which one do you have to follow to not void the warranty? I’ve tried to do research on it, but haven’t seen much. I don’t want to void my warranty, due to rarely towing or off roading with my truck, and following the normal routine, then to find out I needed to follow severe and change tranny/transfer case etc. fluids. Any thoughts?