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    Driver side mirror issue

    I have the same problem on my 2021 Yukon Denali. It just started happening after about 45K miles. I start the car and the drivers mirror will move as if it thinks I’m in reverse and it’s trying to help me (even if I’m still in Park). It will remain in the wrong position and I have to...
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    Constantly asked to change key fob battery

    In my 2021 Yukon Denali the screen behind the steering wheel is almost always asking me to change the battery in my key fob. I have a single key fob in the car, and this happens even if I've just put a fresh battery in. I've tried a couple different brands, including a Duracell 2450 3V battery...
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    Denali 2022 vs. 2021????

    Do you know where to find info on which VINs / serials are affected? I couldn't find any info via search or on GM Authority.
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    21 Denali Water Leak

    Dealer said they fixed it by seating a grommet that had come out of place. But I still see the same two problems going on - the noise in the roof and the wet front carpets.
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    21 Denali Water Leak

    Same problem here. I just posted about it before someone linked this post. https://www.tahoeyukonforum.com/threads/water-shows-up-under-mats.124979/ I noticed the noise after the first rain. I didn't notice the water under my all-weather mats until recently, so I'm worried what damage that has...
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    GMC weather mats/cargo liner install ...

    Same issue. The cargo liner just slips around and is a hassle when loading and unloading anything heavy.
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    Water shows up under mats

    I have the OEM all weather mats (84503128). I woke up to vacuum the car in the morning and found that there was water underneath the front driver and passenger mats. It seemed like a lot of condensation, but only under these mats. The 2nd row was fine, and there was no sign of any moisture...
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    Can I add shortcuts to app tray at bottom of screen?

    I couldn't find a way. But I could customize the icons on the main screens.
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    Front parking sensor sensitivity

    I have had the same issue. Reported it and they claimed to have fixed it but it hasn't improved. I'll share B520044's fix and see if they can try again...
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    Floor Mats

    I went with OEM mats for the 1st, 2nd, and cargo. They aren't as protective as the OEM mats from my Honda - they don't cover as much area or have as deep lips to catch spills as well. But the material is not too slippery. I wasn't happy with the cargo mats. They just stick using two sided...
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    2021 Yukon Denali - Electrical accessories are rebooting with auto start/stop

    Turns out that even the hardwired V1 is rebooting with the auto start/stop. It does not loose power when it goes off at a stop light, but it will reboot when taking off again. I hardwired it to one of the harnesses behind the shroud above the rear view mirror.
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    2021 Yukon Denali - Electrical accessories are rebooting with auto start/stop

    Good eye, thanks. It's on page 100 in my manual: https://my.gmc.com/content/dam/gmownercenter/gmna/dynamic/manuals/2021/gmc/yukon/2021-gmc-yukon-owners-manual.pdf Not sure why anyone *wouldn't* require an uninterrupted power supply, but it may be hard to honestly convince the dealer it's a...
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    How are the headlights?

    They're great. Auto high beams work great too.
  14. H

    Crossbars?

    Can you tell if these are rebranded Thule or some other brand?
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    Question for those that have the Rear Media/Entertainment Package...

    Re: using a USB, I'm doing the same thing. You can safely eject them by pressing the bottom bar at the homescreen and scrolling down to the eject button (which exposes what looks like Android system UI coming through as a toast; does anyone know more about the OS and software running on this...
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    Crossbars?

    Do we agree that aftermarket cross rails are higher quality / more reliable (but can be more expensive), when combined with an aftermarket box? That's the path I was going to take. I'm assuming they're available already (compatible with existing flush rail systems).
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    So, what’s the verdict of the 21’s so far

    Is the PACM some part of the ECU? Anything I can describe to the dealer to make things go smoothly? Not sure you understood my issue - I think the homelink is working as designed. I just don't want it to function when the car is locked / off / no key, due to the security issue. I believe this...
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    2021 Yukon Denali - Electrical accessories are rebooting with auto start/stop

    Interesting. To be clear, the 12v and outlet (haven't tested USB) ports *are* hot when the auto stop/start is stopped/off. The issue is that they reboot. I couldn't find any mention of this in the manual, or any fuse trick. The 12v and outlets are described as always on, as long as the outlet...
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    2021 Yukon Denali - Electrical accessories are rebooting with auto start/stop

    Oh I'll definitely hardwire the radar detector. And I'm assuming it won't reboot if I do. But I still want my 12v and outlet power working reliably. Are others' outlets not doing this? I'd like to understand if this is a common problem.
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    Question for those that have the Rear Media/Entertainment Package...

    My notes from playing with the RSE for a roadtrip: * The sdcard is only for the nav, don't touch it (you can't load media with just an sdcard) * USB keys need to be formated FAT32 to work as video/audio content; exFAT does NOT work * Video content in .avi containers are not supported, but .mkv...
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    So, what’s the verdict of the 21’s so far

    Have spent a week and one roadtrip with a 2021 Yukon Denali. My gripes: * The parking sensors have way too many false alarms; e.g. firing off when pulling in or out of a mild, empty driveway * Brake pedal is not adjustable * Homelink Garage door openers work when off/locked/no key *...
  22. H

    2021 Yukon Denali - Electrical accessories are rebooting with auto start/stop

    A valentine one radar detector connected to the center console 12v power will reboot when stopping with auto start/stop enabled. It doesn't reboot in another car. I also tried with a streamer connected to the outlet in the 2nd row and it would also reboot. So it has power before after the car...

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