[AZ Traveler]

Your truck does not have serviceable wheel bearings - they are made to drive until failure and are very reliable. Tapered serviceable bearings in autos and trucks were generally phased out in favor of non serviceable sealed bearings in the early 1990s.

The wheel bearings on your rig still need to be serviced regularly. Once a year on a disk brake equipped rig is overkill in my humble opinion unless you all pulling it over 15K miles a year. I would be comfortable doing the service every 2-3 years for lower mileage although the manufacturer recommend yearly. "Back in the day" when my cars and trucks had serviceable bearings I typically ran them 25-30K miles before repacking them.

For drum brake rigs once a year is critical to inspect the brakes - once you have gone that far you might as well pack the bearings also.