u/KaleidoscopeNo2582

Hi y’all. Ive notice a clunking sound in the rear of my 2022 Sierra AT4 3.0l Duramax and I’ve come to the conclusion that it’s coming from bad bushings on the leaf spring. Has anyone come across this problem?
Talked to dealership and they told me i have to buy the whole leaf spring. Ive seen they sell aftermarket bushings, but Im not sure which one to buy.
If anyone gives me advice I would really appreciate it, thank you.