Then transferred to the Pacific, she transited the Panama Canal at mid-month and arrived at Mare Island, Vallejo, California, on 14 February to begin a Greater Underwater Propulsive Power Program (GUPPY-II) conversion.

For the next two years, she remained in the eastern Pacific operating primarily off California, but during the summer and early fall of 1948, ranged as far north as the Aleutian Islands.

A unit of TF 96, Naval Forces Japan Remora patrolled Soya Strait, between Hokkaidō and Sakhalin in late July and early August.

During the next two years she underwent overhaul, provided services for the Line School at Monterey, California, and conducted local training exercises.

After the fighting in Korea ended, Remora remained based at San Diego and through the decade continued to alternate training exercises and patrols in the western Pacific with similar First Fleet operations off the United States West Coast and in Hawaiian waters.

Remora was one of the last diesel boats to receive the Navy Unit Commendation for "Meritorious Service for operations during the Summer and Fall of 1967."