I have the 2016 Duramax long bed Colorado (mid sized truck) ... I switched tires to 245 75 17 E rated as I go places with a lot of shale stone roads and I at times carry weight. That said...the diesel has a 700 Lbs. over the gas engine up front. While the bed might be empty. What are recommended pressures for the front and rear in typical driving? ....... Then a nice ride with a load? Nothing nuts.... 80 lbs rattles ones teeth.