Creaking noise in suspension

[dhspring]

This isn't a major problem, but wonder if anyone else has it, I've got a 2001 Astro and when you accelerate from stop, you hear a creaking noise like an old rocking chair, I believe it's rubber elements on the shocks or other part where rubber is present in the suspension. It occurs when "rocking" the body on the suspension as from a dead start on the gas, or rolling slowly then hitting the brakes. Has anyone else seen this? Thank!!