OER Parts offers a wide selection of Oil System & Parts for your 1961 GMC 1000 Series. OER Parts offers 1961 GMC 1000 Series Bypass Valves, 1961 GMC 1000 Series Dipsticks and Tubes, 1961 GMC 1000 Series Filter Adapters, 1961 GMC 1000 Series Oil Coolers, 1961 GMC 1000 Series Oil Filters, 1961 GMC 1000 Series Oil Pan Baffles, 1961 GMC 1000 Series Oil Pans, 1961 GMC 1000 Series Oil Pickup Tubes, 1961 GMC 1000 Series Oil Pumps, and 1961 GMC 1000 Series Oil Senders.