In order to show the swept path analysis of your fire truck, you will need to make use of the AutoCAD extension called Vehicle Tracking.
Search for Vehicle Tracking tool
Download and Install
Go to Vehicle Tracking tab
Check that Settings are good
Click on top of AutoDrive Arc button
Select desired vehicle typeImport from other file if you don’t see needed vehicle
Click Proceed
Draw path from Start point to End. You could reverse truck back and forward
Isolate Vehicle path only
Save
Go to Revit
Go to Import tab
Check Coordinates and proceed with import