GM Omron Relay, GM part number 5510-0329. This is a genuine GM OEM part, not the cheap aftermarket stuff. The relay has been thoroughly bench tested and inspected prior to being listed for sale. Most relays will outlive your vehicle, however, when one fails you can count on us to deliver a certified product at a fraction of dealer replacement cost. 6 month warranty with this relay. Please contact us with any questions that you may have. We offer free shipping on this item.