Hey guys, so I had my car diagnosed for a chirping noise. Basically, the mechanic told me it was the valve cover gasket that needed to be replaced and oviously gave me an outrageous price to fix it. I went ahead and ordered the part directly from GM and replaced ity self but the chirping noise is still there. So now I don't know what it is that is causing it. if anyone had this problem before, I can really use some help .