Final answer:
Dealership staff should review the Service Campaign notification letter or consult the service department to determine the expected duration of the service.
Step-by-step explanation:
Dealership staff should review the Service Campaign notification letter to determine the expected duration of the service. The letter may provide information on the estimated time needed to complete the service. If the letter does not specify a time frame, dealership staff should consult the service department to get an accurate estimate. Factors such as the type of service, availability of parts, and current workload will influence the duration of the service.