front end noise - 2006 silverado

[turbostar]

Looking for experience from the forum. There is a noise in the front end of my low milage(50k) 2006 Silverado crew cab. I would describe it as a clunk whenever I hit a bump. It comes from both driver and pass side but driver side noise seems worse. If I would guess I would think it was from worn/loose shock bushings. But after inspecting they are not loose at all. Is there something in these trucks that wear quickly or is prone to getting loose? The shocks need replacing but are not loose. Can the clunk be coming from something inside the shocks? Thanks for all input.