Factory suspension except the leveling on the front . I have a 800pd weight distribution/antisway bar that levels it out perfect . I love the way it Tows , stays straight no sway and not weighted down in the rear . Was thinking about doing a 5th wheel but decided not too since I’d hate to loose my bed space . No issues what so ever , I absolutely love towing with this 2500 !!!!. Planning a trip out Midwest this year for a long haul .