Features and Benefits: Required to test cooling systems on late model GM in.N in. body cars Saturn and full size Ford cars as well as some IHC and Kenworth medium and heavy duty trucks Thread specifications: M52 x 2.5 Cooling System Threaded adapter is required to test cooling systems on late model GM in.N in. body cars as well as all Saturn and new full size Ford cars. Buick: 1998-92Cadillac: 1998-94Chevrolet: 1999-92Ford: 2002-94Ford Truck: 2002-95I.H.C.: 2002-94Lincoln: 2002-93Mercury: 2002-93Oldsmobile: 1999-92Pontiac: 1998-92Saturn: 2002-93 GM in.N in. body Saturn Full size Fords.