On my way home from town I set the cruise and the truck started bucking and jerking on cruise control. Cancel cruise control throttles fine, Set cruise again bucking and jerking. So I pull over unplug the field lead and drive home. No issues at all. Pull out my Fluke DVM and measure at the BATT terminal of the alternator and was getting 0.244 not a typo... So of to the part store again to get another alternator under warranty.