General Motors TH-8603

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GMC TH-8603/T8H-603
Rochester-Genesee Regional Transportation Authority 716-a.jpg
Years of manufacture 1978 to 1980
Length 40 feet
Width 96 inches
Power/Fuel Diesel

The General Motors TH-8603 is a Rapid Transit Series transit bus of the General Motors RTS-03 generation. The model breakdown is as follows: T signifies a transit model, 8 signifies a 40 foot length, H signifies the use of a Detroit Diesel 8V71N engine, 6 signifies a 96 inch width, and the 03 signifies the generation.

The model was later redesignated during the middle of production to T8H-603.

556 buses were built.


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Demonstrator/Engineering Units

  • List of known demonstrator and engineering buses
Fleet Number Thumbnail Year VIN Engine Transmission Notes
200 1978 066 Detroit Diesel 8V71N
331 April 1979 331 Detroit Diesel 8V71N GM Engineering bus.
387 December 1979 387 Detroit Diesel 8V71N GM Oldsmobile Division (Lansing, MI).
459 January 1980 A459 Detroit Diesel 8V71N GM Engineering bus.
1000 1978 067 Detroit Diesel 8V71N

Preserved Coaches

Year Thumbnail Serial Original Owner Fleet Number Current Owner
1979 122 MTA Maryland 3336 MTA Maryland as a roadeo bus.
1980 A465 MTA Maryland 3366 Private owner.
1980 A488 MTA Maryland 3389 Private owner.