Tailgate beeps once every 30s when parked no error messages

[sd22]

My truck has been making this singular beep every 30 seconds when parked. Both while powered off or on locked or unlocked. Seems to be coming from the tailgate area. It’s infuriating.

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[Grumpy2]

How long does the warning continue? What do you do to stop it?

 

[sd22]

It seems to have fixed itself after I drove it around all day. Very strange. The singular beep every 30 seconds continued for about 2 hours

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