Laden with oil, vital fluid of war, Chewaucan cleared Baytown, Texas, 22 March 1945, and reached Pearl Harbor 6 May.

Between 23 September 1946 and 4 July 1947, Chewaucan operated out of Seattle, Washington, on cargo duty to various Alaskan ports, then sailed in the Pacific Ocean, calling at Pearl Harbor and Kwajalein and ferrying oil until 6 January 1948.

She sailed from San Pedro, California, 8 January 1948 and entered Philadelphia Naval Shipyard 4 February for conversion to a combination oiler-tanker.

Home ported at Naples, Italy, in support of the 6th Fleet, she remained in the Mediterranean except for periodic overhauls in the United States through 1960.

Her crew was eligible for the following medals: This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.