OER Parts offers a wide selection of Battery Accessories for your 1971 GMC C15/C1500 Pickup. OER Parts offers 1971 GMC C15/C1500 Pickup Battery Tender, 1971 GMC C15/C1500 Pickup Battery Managment System, 1971 GMC C15/C1500 Pickup Dual Battery System Controller Set, and 1971 GMC C15/C1500 Pickup Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller