I have a 2003 Express 2500 Conversion van that had a death wobble. It was horrible and terrifying. One time driving down the rocky mountains I hit the brakes and the violent wobble made me feel like we would lose control coming down a steep hill. That's when I decided to finally get this fixed. So here's my story and I'm testifying here: Here were my attempts:
1st. Got wheels checked for balancing, they said it was fine
Then I went for an alignment check..no problem.
2nd. Got brake drums because of uneven wear. This after reading on forums possible wobble causes. Nope, wobble came back.
3rd. Got new brake calipers in case they were failing. Nope, didn't work.
4th. Got new shocks thinking they were wore out. Nope.
5th. Going to colorado got tires balanced and weights put on the outside. Nope.
6th. Sick and tired of it, had our shop guys look again. They noticed uneven wear on the tires. I said I'm getting new tires and rims, sick and tired of this.
7th. Got new tires and wheels. Problem went away, slamming brakes and no more wobbles. And it feels so good.
I suggest you get tires really looked at, very closely!