OER Parts offers a wide selection of Battery Accessories for your 1957 GMC 250. OER Parts offers 1957 GMC 250 Battery Tender, 1957 GMC 250 Battery Managment System, 1957 GMC 250 Dual Battery System Controller Set, and 1957 GMC 250 Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller