P.O. Box 601105
Sacramento, CA 95860-1105
Email: info@pacbus.org

Key System Transit Lines 2103

Key System Transit Lines GM TDH4801 # 2103 was as part of a 21 bus order (2100-2120) delivered new in 1958 as replacements for Key System’s San Francisco-Oakland Bay Bridge Railway trains in 1958. 2103 played a significant role in local transit history. It was the first bus in revenue service for AC Transit when they took over operations from Key System Transit Lines shortly after midnight the morning of Saturday, October 1, 1960. 2103 had been on long term loan to AC Transit by the Western Railway Museum, who donated the bus to the PBM in April 2013. The PBM is pleased to add this restored and operable GM “Old Look” to the museum’s bus collection.


Manufactured by General Motors Truck & Coach Division, Pontiac, MI

Model TDH4801, Serial # TDH 4801-530. Built 1958

Power train: GM 6-71 Diesel engine w/ 2 speed Hydromatic transmission

Body: Aluminum monocoque body construction

Seating: 48 passengers – Transit seating

Length 37.9 ft. – Width 102 in.

Current Status

2103 is restored and operable. Replacement of two cracked windows and installation of side window rubber seals remain.

Adopt This Bus

Support the PBM’s bus preservation efforts. Join the museum’s Adopt-A-Bus program. Adopt this bus or any PBM bus of your choice by contributing to a special fund account reserved for maintenance and or restoration of each bus. All of the PBM’s buses have their own special accounts and all funds donated to a particular account will be used only for that bus.

To donate to the Special Funds account for this bus indicate Key System 2103 on your contribution.

Click here to make a donation to the “Pacific Bus Museum” for this bus.

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