This from Bill Friedrich:
While not the Chicagoland area proper, this Illinois rig ended up in Eva,FD,TN. The vehicle still is lettered up for the Mendota & Countryside FD
Specs as follows: 1985 Kenworth-FMC 1250-1250
Kenworth L700/FMC Omega fire engine in Eva, TN. This was formerly owned by the Mendota Fire Department in LaSalle County. Evan Smith photo