A Critical Change in the Procedure That Bleeds Air from the Cooling

Multiple Choice

A critical change in the procedure that bleeds air from the cooling system is needed to resolve overheating concerns. Technician A states that in this situation, the manufacturer would issue a service bulletin explaining the problem. Technician B states that this can be done by the shop itself. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B