Without reading all the responses first, on my GMs there are just long bolts with rubber bushings. They rust off and break and you get a creaking noise on bumps or turns generally. They aren’t that hard but can have problems getting the old rusted ones out and need to be cut off. Also I’ve had problems getting the nuts on the new ones started and have to somehow compress the sway bar enough to get the nuts started. Then its just a matter of tightening them down. The parts themselves are about $20 so the price doesn’t seem bad for the hassle.