On 2 October 1946, a trolleybus line from plac Kaszubski to Chylonia was opened. An electrical substation was also opened in Grabówek at a power of 720 kW. At the end of 1947, the Wydział Trolejbusowy (Department of Trolleybuses) had 24 vehicles and 3 trailers. This allowed the extension of the Orłowo line to Sopot. In 1949, MPK Wrocław gave Gdynia 8 Tallero trolleybuses that were abandoned by Germans and not activated. These trolleybuses were repaired and entered service in 1950, numbered 230-237, servicing the line to Sopot and Chylonia. On 22 August 1949, a new trolleybus line to Mały Kack was established, numbered 23. This line was serviced by 13 French Vétra vehicles, numbered 300-312. On 29 October 1949, a new line numbered 24 was opened to Oksywie, with a loop by Dowództwo Marynarki Wojennej. On 5 November 1950, the line to Chylonia was expanded to Cisowa as line 25.