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Discussion Starter · #1 ·
2022 1500 Denali with the multipro tailgate

Both the manual and the sticker on the inner side of the truck bed both say to hold the upper button for 3 seconds to lock the inner tailgate so it will lock and can't drop. I've tried that many, many times along with the remote fob within proximity (right up on it) and it does not lock the inner tailgate. It will always unlock at the push of the upper button. Any advise?
 

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Reads like 3 seconds to disable.
And 3 seconds to re-enable.
And a tail light flash when it changes state.

Are you getting the taillight flash when disabling?

If so, is it re-enabling because the button is held for 3 seconds when checking ?
 

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2022 Sierra 2500HD AT4
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It works fine on mine... like @redwngr said, hold the upper button until the tail lights flash.
 
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