I have a 2000 silverado thats broken down, it needs a fuel pump which i suspected but I don't have the time to change it so I sent it to Cheseldine Tire & Auto. They said the OEM fuel pump cost around $500.00 now I looked it up on auto zone, advanced,rock auto, and numerous other parts stores and the most i've seen is $381.00. Is there a chevy OEM website that I maybe am overlooking? Or am I nutz?