I've been experiencing same ride issue with my 2009 GX470. In the recent past, it was where when i would exercise the suspension, it would become somewhat comfy BUT now, no matter how much i exercise, the ride is very bumpy. One side of the vehicle is slightly lower than the other side.
Yesterday i noticed that my suspension control switch is a bit warm/hot to touch, which has never happened in the past. I am thinking its also my switch thats causing problem? I just dont wanna go through the process of elimination with these things