Upgrade '16 Denali to HDMI input from '17 models?

[UNICORNDAD]

Yes I can do that sometime this weekend! So you just need underside of each circuit board?


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[atlankford]

I feel like the reality of this is fleeting. It's starting to look like it's not possible. And even if it is......retaining the HD video signal sounds like a major rework.

 

[Bardog]

I feel like the reality of this is fleeting. It's starting to look like it's not possible. And even if it is......retaining the HD video signal sounds like a major rework.

Agreed... Just did a 2000 mi road trip with the kids and they had no issue with the Amazon Fire Stick plugged into my ‘16 Denali console via composite. Switching to HDMI isn’t going to magically enhance the resolution of the rear screens by a great factor, or even a small one.

 

[UNICORNDAD]

Yes I agree a converter will not give you any better solution. That’s what I use now. I purchased the 17/18 module that has a hdmi port. The only way to work is by bypassing the existing harness or buying a new one to send hdmi to the head unit. The system already supports blue ray, so the annoying part is that some where in the line or unit it is downgrading for the rca composit line and inputting into the blue ray switch.

Does anyone have any knowledge on what prongs carry what on the 2015/16 composit line?




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[tullywork]

I've got a '16 Yukon XL and was pretty disappointed it had the composit connectors too. I tried a few converters and while they worked, it was more complexity/hassle than I wanted. Then Roku recent released (probably about a year ago now) the Roku Express+ (https://amzn.to/2MvSCwD) and it works PERFECTLY right out of the box. I really only wanted something to play Amazon Video and Plex and the Roku does the job. I originally wanted something that I could load a bunch of movies on an SD card or USB stick, but the streaming and $20 unlimited wifi data plan has been more than sufficient for our road trips. If you loose cell signal the video gets choppy, but streams much better than I originally expected it would (guess it buffers a bit in the background) that it performs better than expected. Might be something to try!

 

[cmatt]

For those of you asking about the pin out of the 12 pin X82 connector on the 2015-2016 suvs, here it is.



Here’s the 2017+ X82 connector.



The 2017 uses pins 1, 3, 7, 9 & 10 from the 2015-2016 connector. Those circuits are the power, ground and headphone signals.


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[cmatt]

I’ve got the 2017+ X82 audio/video adapter installed and working with the exception of the HDMI port in my 2015 Yukon. I’m still testing to see if I can get it to work. Both USB ports work/charge. I’ll expand on things shortly.




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[Darren Trokhan]

Thanks Matt. That's helpful.

The HDMI seems trickier. The 2017+ AV unit looks like it has two USBs, but one of them is for the video signal. I'm not sure of the name of the DVD unit in the dash, but I think the video needs to plug into that. You posted some wiring diagrams earlier that showed a LVDS connection that goes to the X5 port on the DVD unit. Do the 2015 and 2016 DVD units have that port for plugging in the video connection?

I saw a picture of the DVD unit in a stereo removal video on Youtube. It looks like there are several of the USB connections on the back, but I'm not sure what they all do. And I'm not sure whether the picture is of a 2017+ DVD unit or an older one.

DPT

 

[cmatt]

Thanks Matt. That's helpful.

The HDMI seems trickier. The 2017+ AV unit looks like it has two USBs, but one of them is for the video signal. I'm not sure of the name of the DVD unit in the dash, but I think the video needs to plug into that. You posted some wiring diagrams earlier that showed a LVDS connection that goes to the X5 port on the DVD unit. Do the 2015 and 2016 DVD units have that port for plugging in the video connection?

I saw a picture of the DVD unit in a stereo removal video on Youtube. It looks like there are several of the USB connections on the back, but I'm not sure what they all do. And I'm not sure whether the picture is of a 2017+ DVD unit or an older one.
View attachment 209467

DPT

Yes, the dvds have the same ports. The blue LVDS usb cable is the key. It connects the AV unit, dvd, front screen and HMI together. Unfortunately, the schematics aren’t comprehensive in what they show. That additional usb plug is fed by the blue LVDS usb cable that splits off the dvd plug. I believe it also carries the HDMI signal.

I’ll get my thoughts together and write up what I’ve done so far and where I need some input and help.

 

[mfennema]

I may be way off base, but is this as "simple" as swapping the modules and the old harness for the new harness that you posted earlier @cmatt ?