Give it a day and a couple on/off cycles. Mine did the same thing when I unplugged the rear wiring harness (with battery disconnected). It came back after about 24 hours or so and one or two cycles.
If that doesn't help, then yes, dealership unfortunately.
That sounds like a couple people that had the wiring in the tailgate slightly loose .Thank You …. I opened and closed the tailgate when I came out of work at 5:00, and it was back on …. Have an appt at dealership for the 30th …. We’ll see …. Thx again
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