1974 GMC P8M4108a-125



Bus Year



Detroit Diesel 8V71 318 HP w/Jake Brakes & Block Heater




SE Wisconsin







  • As far as is known, this is the lowest mileage Buffalo bus in the United States with just over 60,000 original miles. It has been professionally maintained throughout its history and has always been meticulously cared for.


  • This bus was converted on a brand-new shell by Custom Coach in 1974, with the original conversion totally intact with only minor decorating changes to the interior. The exterior paint is original and in great condition.


  • The engine starts at the first touch of the starter switch, even when cold. Jake brakes were added using OEM parts and maintaining fast idle.


  • OTR a/c functions correctly and will keep the bus comfortable while traveling. Compressor was replaced in May 2018 and system converted to modern refrigerant.


  • Tires were replaced in March 2020 and have about 8,000 miles on them right now. Front airbags are new, and rear air bags are in great shape and hold air for months. OTR heat/defrost fully functional.
  • Interior has two custom-built a/c units from Custom Coach which will keep the interior as cool as you’d like. They are easily serviced and have been maintained with new start & run capacitors.


  • All house systems work as they should, including the kitchen appliances, water heater, nearly-new 12vdc compressor fridge, and brand-new Victron 2x 120 inverter/charger. Interior heat is provided by both propane forced-air furnace and electric heaters.


  • Please see the linked PDF for a detailed description of the bus’s components and features and the linked BCM article for more information about the bus’s history.


  • Included in the sale are a lot of spare parts including one windshield, many exterior light fixtures/lenses, and a spare nose skin.


  • Bus has just had its fall maintenance completed and is ready to drive anywhere. Bus is currently in SE Wisconsin, and delivery can be arranged, depending on location.
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