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 1946–7, and 1948–9, and maintained her readiness through local operations from San Diego.

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 TF 77, the carrier force which launched almost continuous raids on North Korea.

Chevalier's post-war operating schedule alternated tours of duty with the guardian 7th Fleet with necessary overhaul and training activities along the west coast.