Liftgate lifts but does not stay up on 2006 Nissan Armada

My liftgate suddenly lifts using liftgate door handle, but when is gets fully open, it just drops. Is it the struts or is it some actuator thing?

Asked by for the 2006 Nissan Armada
The struts have failed. They are like narrow bicycle pumps filled with oil. Try looking on or other auto parts web sites on line. A company called Beck Arnley make a wide range of these tailgate struts. Also try Napa auto parts stores.