That was filmed in Trenton, NJ. About 5 years back I saw it after many years and noticed "Trenton" lettered on the trucks. I'm surprised that back in the day I never realized that. Also, I'm guessing that they had the film crew at the busiest station in the city, that way they'd be sure they'd be able to get exactly what they want. I'm extremely involved in fire service history and such, so if you'd like, I can use some of my contacts and see what kind of information on this film they can dig up.