Dogfight (1991, River Phoenix, Lili Taylor)
At the beginning of the film Phoenix arrives in San Francisco aboard Greyhound GMC 'Buffalo Bus' 4107:
Also seen are San Francisco streetcar 3 and a Grayline Bristol Lodekka/Eastern Coachworks serving as a 'Visitor Information Center'. It looks to me like 449SNU, new as Midland General 509 in 1962, a short FSF6G variant.
He leaves aboard a Ford B-series: