How To Disable The GMC Sierra MultiPro Inner Tailgate
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General Motors introduced the GMC MultiPro tailgate with the 2019 GMC Sierra, offering customers a variety of configurations capable of providing added functionality and usability over a traditional tailgate. Unfortunately, the MultiPro tailgate can be damaged if dropped onto a ball hitch. That said, there’s a way to avoid this damage by disabling the inner tailgate function.
Before we launch into this, let’s first revisit why it matters. The MultiPro tailgate on the GMC Sierra includes an inner gate that will fold down independently of the primary gate, enabling configurations like an inner gate work surface, full-width step up into the bed, and inner gate load stop. However, if both the inner gate and primary gate are dropped on top of a ball hitch, the inner gate could be damaged.
As such, GM TechLink has outlined a way to disable the inner tailgate from dropping, thus preventing inadvertently damaging it.
The GMC Sierra’s MultiPro tailgate features two buttons on the tailgate itself, including a top button that drops the inner gate, and a lower button that drops the primary gate. Both buttons can be pressed at the same time to drop the two gates simultaneously.
To disable the inner gate, press and hold the upper button for three seconds. After three seconds, the taillights will flash to indicate that the inner gate has been disabled. Note that the key fob must be within three feet of the tailgate for this trick to work.
To reactivate the inner tailgate on the GMC Sierra, once again press and hold the upper tailgate button for three seconds. The taillights will once again flash, indicating that the inner gate functionality has been restored.
It should also be noted that this trick also works with the Multi-Flex tailgate on the Chevy Silverado.
Additionally, tailgatefix.com has developed a product that also prevents the inner gate from dropping when a ball hitch is attached. As GM Authority covered previously, customers are offered a manual override switch and an auto-engage override switch.
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TailgateFix now has a new wiring harness that solves this problem.
This fixes the issue with the 2022 and 2023 models.
Just picked up a 2022 Sierra SLT – I have had the fob touching the panel next to the buttons. Tried a dozen times – it does NOT disable it
Why does my 2022 AT4X not have the inner tailgate option to disable?
My 2022 gmc Denali refreshed doesn’t work to disable the upper tailgate..I hear their will be a over the air update for that don’t know if that is true or not.
“Over the air update?” Is this something new? Like via the cell connection or On-Star?
GM / GMC apparently sent a notice to dealers, indicating engineering was working on a fix – they have been working on this since February – my dealer said “don’t hold your breath”. (The GM / GMC dealer Service Manager did show me the GM Notice – so I do know this is all true information) – the inner tailgate function does NOT work – even though, a sticker on the left side of the bed (with tailgate down) tells you how to disable the inner gate
The inner tailgate on my 2022 elevation won’t open and the enable/disable method does nothing. The lights never flash.