uncomfortable driving class a dp

I have degenerative disc disease. My pain is just below the belt just right of my spine. Sitting anywhere hurts, the longer I sit the more it hurts. I used to think my pain was in the hip but when my chiropractor manipulates my si joint, it relieves the pain. That is the joint between the spine and hip bone. Just have to experiment with positioning to see what hurts less.

Since it doesn't hurt in your other vehicles, I would say it has to have something to do with the seat. If you put cruise on and drive 30 minutes, can you do it without pain?