OER Parts offers a wide selection of Battery Parts & Hardware for your 1976 GMC C15. OER Parts offers 1976 GMC C15 Battery Trays, 1976 GMC C15 Battery Hold Down J-Bolts, 1976 GMC C15 Battery Tray Hold-Down Clamp, 1976 GMC C15 Top Battery Tray Clamp, 1976 GMC C15 Battery Tray Brace, 1976 GMC C15 Quick Release Battery Cable Bolts, 1976 GMC C15 Side Terminal Battery Cable Bolts, 1976 GMC C15 Side Terminal Battery Charging Post, and 1976 GMC C15 Side Post Battery Cable Terminal.