Shout out to Mark (
@Rocket Man) and this thread
https://www.tahoeyukonforum.com/threads/frustrated-with-2005-tahoe-suspension.114834/page-3
In my inexperience I cut out the jounce bumpers mount and put in a universal pancake bump stop thinking that it was just a plain old bump stop. Wrong. Thing swayed like a dang pirate ship on open water. Almost to the point of being hard to control. Pulled the wheel and measured distance from the area where the jounce bumper should have been and bought these
Energy Suspension 9.9101G ALL PURPOSE BUMP STOPS (2)
https://www.amazon.com/dp/B000CNB5OK/ref=cm_sw_r_cp_apa_i_xTv0DbA67YBZ0
They were a little shorter than the 2 3/4 inch between the arm and mounting location. I took a gamble thinking I could turn some aluminum solid bar I have at work into a bit of a spacer to get it to make contact with the arm. Luckily, no need to do that. After I installed them and fully loaded the front end, the new jounce bumpers just kiss the lower arm as they should.
Results: night and day difference, significantly less body roll. And no more swaying back and forth when I hit a freeway transition. In fact, it may be a bit too stiff for some with them being polyurethane and not that foam rubber that came factory. But I like it.