Mahalla

We have a 2001 Chevy 1500. It has a major death wobble. We replaced the tie rods, pitman & idler arms, steering stabilizer, u- joints and it still does it. A mechanic is telling us it's the abs brake module & pump, others are saying steering box. Thoughts? We've had the truck 7 yrs and have had good luck with it until now. We've already dumped over $3k into fixing things and it still about throws you into the barrier shaking so bad.