OER Parts offers a wide selection of Oil Cap for your 1961 GMC 1000 Series. OER Parts offers 1961 GMC 1000 Series Chrome Oil Caps, 1961 GMC 1000 Series Deluxe Twist-On Oil Filler Cap, 1961 GMC 1000 Series Chrome Twist-On Oil Caps, 1961 GMC 1000 Series Chrome Push-in Oil Caps, 1961 GMC 1000 Series Billet Oil Caps, 1961 GMC 1000 Series Polished Aluminum Oil Caps, and 1961 GMC 1000 Series Logo Oil Caps.