Chevalier cleared Guantánamo Bay on 18 June 1945, and reached Pearl Harbor on 9 July. On the 24th, she sailed to join in the bombardment of Wake on 1 August, arriving at Eniwetok next day. She joined Task Force 38 off Honshu 18 August, and with her force entered Tokyo Bay on 26 August [sic]. After patrol and escort assignments supporting occupation activities in the Marianas and Philippines, Chevalier sailed from Saipan 25 March 1946 for San Diego, arriving 11 April.

Before the Korean War, Chevalier completed tours of duty in the western Pacific in 1946–47, and 1948–49, and maintained her readiness through local operations from San Diego. On 18 March 1949, she was reclassified as a radar picket destroyer (DDR) and during the summer and in the fall of 1949 operated in the Hawaiian Islands. During the Korean War, she served actively in the Far East between 6 July 1950 and 25 March 1951; 15 October 1951 and 31 May 1952: and 2 January 1953 and 22 August 1953. Her duty during the major portion of each tour was to join the protective screen of Task Force 77, the carrier force that launched almost continuous raids on Northern Korea. She also sailed on protective patrol in the Taiwan Straits.

Chevalier’s post-war operating schedule has alternated tours of duty with the guardian Seventh Fleet with necessary overhaul and training activities along the West Coast. In 1954, 1955, 1956–57, 1957–58, 1958–59 and 1960, she sailed for visits to Far Eastern and Australian ports, patrol duty in the Taiwan Straits and exercises off Japan, off Okinawa and in the Philippines, which are a part of Far Eastern deployment.

Chevalier received one battle star for World War II service and nine for Korean War service.