Companion make

General Motors pioneered the idea that consumers would aspire to buy up an automotive product ladder if a company met certain price points. As General Motors entered the 1920s, the product ladder started with the price leading Chevrolet marque, and then progressed upward in price, power and appointments to Oakland, Oldsmobile, Buick and ultimately to the luxury Cadillac marque.

However, by the mid-1920s, a sizable price gap had been created between Chevrolet and Oakland, while the difference between an Oldsmobile and a Buick was even wider. There was also a product gap between Buick and Cadillac. To address this, General Motors authorized the introduction of four companion marques priced and designed to fill the gaps. Cadillac would introduce the LaSalle to fill the gap between Buick and Cadillac. Buick would introduce the Marquette to handle the higher end of the gap between Buick and Oldsmobile. Oldsmobile would introduce the Viking, which took the lower half of the spread between Oldsmobile and Buick. Finally, Oakland would introduce the Pontiac marque between it and Chevrolet.

GM's effort is often referred to as the General Motors Companion Make Program. The final structure worked out to the following order:

Chevrolet alone did not receive a companion car at this time. The upper three companion makes shortly failed, with Pontiac alone remaining as a GM marque until 2010.

Chrysler Corporation introduced the Plymouth in 1928 as a base model, beneath pre-existing lines Dodge, DeSoto, Chrysler, and Imperial at the top. It was discontinued in 2001.

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