Hi everyone, so I just got a new 2020 Colorado WT Custom Special 4x4 without the towing package. My older sister is wondering if I could tow her RV trailer for her (weight is 4,900lbs fully loaded) if she bought a hitch receiver and the wiring harness for my truck. On Chevy’s website it says without the towing package it can only tow 3,500lbs not 7,000lbs. The only thing the package has that I wouldn’t put on is a locking rear differential. Can the Colorado still tow 7,000lbs without the locking rear differential or is it absolutely required?