At a glance
What can fail
Water can leak into the exterior tailgate switch, causing the tailgate to unlatch and open unexpectedly while the truck is parked. Unsecured cargo may fall out when the vehicle moves.
What the fix does
The dealership will replace the exterior tailgate switch. Inspect that the tailgate is closed and latched before driving.
Summarized — see the official notice for exact wording, dates, and contacts.