Replying to this thread because it’s the first thing that pops up on Google. I had the same issue and it ended up being the sway bar links. GM updated the sway bar links in 2022 with longer ones.
if you have a 2019-2021 Silverado, you added a leveling kit and you’re hearing a clunk at slow speeds check your sway bar links. Have someone rock your truck side to side on the front and go underneath of it and give it a listen.
You will need part # GM85590925.
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