1962 GMC PD-4106

GM Buffalo bus is the slang term for several models of intercity motorcoaches built by the GM Truck and Coach Division of the General Motors Corporation at Pontiac, Michigan, between 1966 and 1980. “Buffalo” buses have a stepped roof in front, and the first three rows of seats are at different levels, mounted on stepped floors similar to some theatre seating.

 The Scenicruiser was a split-level model, with a lower level at the front containing the driving console and 10 seats behind it, and upper level containing 33 seats. This allowed a baggage compartment underneath the second level, while providing 360-degree view for the upper level. A lavatory was located in the rear of the first level. Scenicruisers were equipped with an air-ride suspension utilizing air bags at each wheel, and were air-conditioned. Later on, model PD-4106, a new design, was incorporated, having air-conditioning powered off the engine, a patented V-drive engine-transmission design, and the 8V71 Detroit diesel motor.

As Scenicruisers became a familiar sight around the United States and in advertising, competing bus companies including members of the National Trailways Bus System sought a vehicle to compete. One of the product designs developed in response to this market demand was the GM Buffalo bus. Unlike the Scenicruiser, these models were available for sale to all operators, and in fact, Greyhound only purchased a few of them; the last GM bus purchased by Greyhound was a 1967 PD4107. Many features, such as the split-level design and the revision introduced in PD-4106 model, were included in the Buffalo bus.