OER Parts offers a wide selection of Oil Cap for your 1963 GMC 2500 Series. OER Parts offers 1963 GMC 2500 Series Chrome Oil Caps, 1963 GMC 2500 Series Deluxe Twist-On Oil Filler Cap, 1963 GMC 2500 Series Chrome Twist-On Oil Caps, 1963 GMC 2500 Series Chrome Push-in Oil Caps, 1963 GMC 2500 Series Billet Oil Caps, 1963 GMC 2500 Series Polished Aluminum Oil Caps, and 1963 GMC 2500 Series Logo Oil Caps.