I test drove a 03 40 ft Newmar Dutchstar with a Freightliner chassis yesterday and constantly had to correct the steering to make it go straight. It seamed that I was always over steering.Is this a pr...
You summed it up "It seamed that I was always over steering".. You probably were. Big difference in the wheel base of your GMC pick up and a motorhome. You have to give smaller inputs longer to take affect.
With practice you should be able to keep it between the lines by barely moving the steering wheel.