A total of 49 examples of the Dash 8-32B model were built for North American railroads. The model is a 12-cylinder version of the (16 cylinder) Dash 8-40B and is powered by GE's 7FDL engine. The first units built for the Burlington Northern Railroad were labelled by GE as B32-8, while later units built for Norfolk Southern followed GE's practice after 1987 of spelling "Dash 8" in the model name.
The GE Dash 8-32BWH (or B32-8WH) is a variant built with Head End Power (HEP) and a wide cab for Amtrak service.
Units were renumbered to the 500 series in September and October 2013 to make room for EMD SD40-2 locomotives from Helm Leasing in the 3500 series. 3563 was retired after an engine failure, and was donated to the Lake Shore Railway Historical Society. 561 (ex-3561) was sold to the Everett Railroad, and delivered by NS Local CB-10 on May 25th, 2017; later sold to NIWX in late 2020-early 2021. In 2022, NIWX 558 (ex-3558) was leased to the Western Maryland Scenic Railroad that operates from Cumberland MD to Frostburg MD, and painted in the railroads paint scheme. First trip was on 9/22/2022