OER Parts offers a wide selection of Battery Accessories for your 1973 GMC K15/K1500 Pickup. OER Parts offers 1973 GMC K15/K1500 Pickup Battery Tender, 1973 GMC K15/K1500 Pickup Battery Managment System, 1973 GMC K15/K1500 Pickup Dual Battery System Controller Set, and 1973 GMC K15/K1500 Pickup Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller