ACDelco is the exclusive Original Equipment parts brand for Chevrolet, Buick, GMC and Cadillac, as well as a provider of premium aftermarket parts for most other makes and models.Other available applications include off-road, marine and industrial. Authorized eBay ACDelco Sellers have been selected because of their direct relationship with ACDelco as part of a certified parts distribution network. The ACDelco Authorized Seller logo is your guarantee that you are purchasing a genuine ACDelco part.