The Studebaker K-Series was a family of trucks introduced for the 1938 model year. The K-Series succeeded the Studbaker J-Series, and was offered in a range of cargo capacities including 1/2 ton (K5), 1 ton (K10), 2 ton (K20), and 2-1/2 ton (K25). Studebaker fit the K-Series with a range of inline six engines ranging from 3.7L to 6.3L. Production of the K-Series trucks lasted until 1940, and the model was replaced by the Studebaker M-Series.