Not all Cummins-equipped Ram trucks will be affected. If your Ram has a water pump from a different brand, or it uses a Concentric pump with some kind of vent holes, you shouldn't have any issues. In fact, the fix will be to replace the non-vented pump with a vented version.
Owners with affected vehicles will be able to bring their trucks into a Chrysler dealer, where the water pump will be replaced at no charge. FCA will begin notifying owners of the issue starting on Nov. 1. Owners can also get in touch with Chrysler's customer service department at 1-800-853-1403 and should ask about recall "T51."