This light comes on when the vehicle's dynamic control switch is off, or when the vehicle dynamic control system is not functioning properly.
Follow this procedure To reset the Vehicle Dynamic Control (VDC):
1. Start the engine and set the steering wheel in the straight forward position.
2. Drive the vehicle at speeds above 10 MPH for at least 10 minutes.
3. The VDC OFF indicator should go off.
If this does not work the truck should be checked by a technician.