I'm thinking you are looking for the bolt that attaches the sway bar bracket that houses the bushing to the frame. This is GM part 15592554, I have two NOS in GM bags and I have one used bolt that has the threads at the very top a bit galled however completely usable. Three will cost you probably $20 or more from GMPartsdirect.com once they add their handling/shipping charge. Let me know if you are interested and provide an offer. Thanks...