This from Chi-Town Fire Photos:
Des Plaines has placed a new unit in service at Station 63. Rescue 63 is a 2021 Ford F-550 Alexis 12′ Response Rescue. Des Plaines is using this unit to run on non emergency calls, follow the ambulance instead of the squad, fire calls, and is also the jump company for their 4th ambulance. Station 63 staffs (2) on Ambulance 63, (3) on Squad 63, (2) on Rescue 63/Ambulance 64.