HDDuramaxhauler

New 17 Tahoe w/20" Continental. Have had multiple Tahoe's over the years and this one is nice except for the unexpected crappy ride and handling. On rougher roads or over bumpy areas the back end will actually jump around like the suspension is ridged and you are constantly chasing the wheel. On the highway it is fine unless you hit a rough bridge joint and it will jump out. Had to get a rental and was a 17 Yukon with 18" package and it drove like a dream over the same roads. Just had dealer swap for a take off set of 18" to run this weekend. Have read a lot about different opinions for the magnetic ride control.....not so sure that's a good thing. friends have a 16 "Burb" w/22" and that is awesome to drive. Why does GM have to always mess up a good thing!! Anyone else have this issue? Thanks for reading