EMD 8204 is on display at the EMD's 75th anniversary open house in La Grange. The demo would become UP 8504 and last only 10 years on the roster.

EMD SD90MAC demonstrator 8204 basks in the sunshine at the General Motors Locomotive Group’s 75th Anniversary Open House. This locomotive would later become Railroad: General Motors Locomotive Group (EMDX)
Locomotive: EMD SD90MAC
Location: La Grange, Illinois, USA
Locomotive #: EMDX 8204
Train ID: Display
Photo Date: September 21, 1997