By 1958, the divisional distinctions within GM began to blur with the availability of high-performance engines in Chevrolets and Pontiacs. The introduction of higher trim models such as the Chevrolet Impala and Pontiac Bonneville priced in line with some Oldsmobile and Buick offerings was also confusing to consumers. By the time Pontiac, Oldsmobile and Buick introduced similarly styled and priced compact models in 1961, the old "step-up" structure between the divisions was nearly over. Earlier in the late 1920s, GM had introduced "junior" brands as a result of the General Motors companion make program as an attempt to bridge the pricing gap between the brands but the overlap and offering eight different brands had a similar confusing effect to consumers and was cancelled by 1930.