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GM Bus Model Numbers Decoded

Using this great page from as a reference tells us this about General Motors model TDH-4512s:

  • T = Transit
  • D = Diesel (until 1968)
  • H = Hydraulic (automatic transmission)
  • 45 = Number of Seats
  • 12 = Series 12


Pages on this site about TDH-4512

PBM History

In 2017 PBM Member, Ron Medaglia, wrote this article on the history of the Pacific Bus Museum, entitled “The Pacific Bus Museum From Hobby to Formal Museum”, for the National Bus Trader magazine.

American Stage Tours, General Motors, GM Truck & Coach Division, Niles Canyon Railway, Niles Coach Lines, Royal Coach Tours, Scenic Hyway Tours, Twin Coach, UC Davis Transit System, Union Pacific Railroad, Unitrans UC Davis, West Coast Motor Coach Museum

Paddle Archives mentioning TDH-4512

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