Vintage Trolley Service has been cancelled until further notice. The SDG&E Silver Line uses three meticulously restored vintage vehicles that make stops along the downtown loop. The PCC Streetcars 529 and 530 of the 1940s alternate with the very first iconic red San Diego Trolley, the 1001 U2 which began service in 1981. Map Schedule The SDG&E Silver Line Vintage Trolley