OER Parts offers a wide selection of Battery Accessories for your 1963 GMC 2500 Series. OER Parts offers 1963 GMC 2500 Series Battery Tender, 1963 GMC 2500 Series Battery Managment System, 1963 GMC 2500 Series Dual Battery System Controller Set, and 1963 GMC 2500 Series Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller