For 1937, Cadillac made the LaSalle its own again, giving it the designation Series 37-50 and the 322 cu in (5.3 L) monobloc V8 of the Series 60, new styling, a lower price range, and a heavy promotion emphasizing that the car was completely Cadillac-built. It was too late. Model year sales of 32,000 LaSalles was a great improvement, but it remained far behind the Packard.
A 1934 LaSalle Series 50 Model 350 was chosen as the Pace Car for the Indianapolis 500, and a 1937 LaSalle Series 37-50 convertible also served as an Indy 500 Pace Car