1934 350	1937 Series 50	1938 Series 50	1939 Series 50	1940 Series 50	1940 Series 52

The LaSalle was one of the companion makes that GM President Alfred Sloan had created in the mid-to-late 1920s (Buick had Marquette from 1929-1930, Oldsmobile had Viking from 1929-1930, and Pontiac was actually the companion make to Oakland, which was last made in 1931).  The companions were create to fill the perceived price gaps between Chevrolet, Oakland, Oldsmobile, Buick and Cadillac.  LaSalle lasted the longest because it's existence gave Cadillac dealers a less-expensive vehicle to sell during the darker days of the Great Depression.

Probably LaSalle's greatest legacy is the role it played in bringing Harley Earl to General Motors.  When Larry Fisher hired Harley Earl to design the 1927 LaSalle, it was supposed to be for just the one model, but the results were so successful that Earl stayed with GM for 32 years, and founded the GM design department, the "Art and Colour Section" (which was the first in-house styling operation for an American automobile manufacturer).  The 1927 LaSalle was patterned after the Hispano-Suiza, and had two-tone exteriors.  Later LaSalles were also know for their style.

Eventually, the price difference between the LaSalle, Buick and Cadillac grew so small that LaSalle's sales volume did not justify the expense of the separate dies.  In 1941 the Cadillac Series 61 replaced the LaSalle, and increased sales by more than 6,000, making up 50% of the total Cadillac sales of 1941.