Here is video that is put out by the RVSEF (RV Safety and Education Foundation) explain how to match you truck to the RV for safe towing. It explains the most common terms and how they relate to each other.
Matching you Truck to your RV
2017 Discovery XLE 40 D DP
Sold Grand Design Solitude 310GK-R
Sold 2016 GMC Denali 1 ton Diesel 3722 CC
5er 13,600 - 3100 pin - Truck Weight 11380 Truck GVWR 11,500
Only 180 lbs below my trucks MAX GVWR