The Engine 51 Squad Is Noticeably Absent Chicago Fire 's Kylie Estevez and Christopher Herrman were noticeably absent from season 13's episode 6.

Set at Firehouse 51, Chicago Fire focuses on the firefighters and paramedics of Truck 81, Engine 51, Squad 3, and Ambulance 61 and how they serve the city of Chicago and deal with their personal ...

Eric Christensen, left, drives the Squad 51 truck for the Nampa Fire Department on Wednesday, July 3 with fire Capt. Shaun Laughlin, on right.

On ‘Chicago Fire,’ Firehouse 51 is home to Engine Company 51, Truck Company 81, Rescue Squad Company 3, Battalion 25, and Ambulance 6.