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Cmatt have you had any luck with figuring it out. I have a 15 Denali and have upgraded my HMI and DVD to the newer models. I am wanting to start the cabling for the module and don’t want to tear anything apart if it’s not going to work. Please let me know
I'm also interested to hear if you ever had any luck getting the HDMI port to work properly. Thanks for doing the R&D for us all!
cmatt..
Have you had any revelations? I'm thinking it's a combination of a newer DVD player (84409491) and a newer HMI module (84331776 or 84546904) to make it work.
I have a slightly different problem. I have a 2018 with RSE (hdmi input). The input is not displaying any res higher than 480p. Signal from a Roku appears zoomed in to just the bottom left portion of what the Roku would normally put out. Yet, other 2018 Tahoes on the dealer lot display 720p just fine. I'm thinking the problem is either my version of the DVD player installed during the build (not support more than 480p from the hdmi input coming to it) or the HMI module. I have 84364936 which is an earlier build than the ones listed above. GM infotainment support is aware of the issue. GM tech support is telling the dealer techs that replacing the HMI won't fix the issue. Of course my response to them is "then what will make it output 720p... if you're so confident it's not in the HMI then where is the problem?". I haven't received that answer yet but will pass along if I find out.
Hello @cmatt I have 2017 DVD player where I can program it ? ThanksI’m close. Just waiting on the programmed DVD player to make it back to me.
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No news lately, it doesn't seem like this conondrum was solved.
You don't need to program the DVD player just buy new version of dvd player 2017 and up...Hey cmatt,
Any updates on this HDMI conversion in the 2015-2016 Yukon/Tahoe/suburban? Is it a lost cause? Last you posted you said that you sent an HDMI unit off to be reprogrammed. I'm really curious how that went!
Thanks!
Kevin
I have a 2018 silverado that didn't have any video entertainment so i added everything to do so. I got the front screen, a 2019 bluray player, the rear screen, and the wiring from harness dr and Amazon. I had white auto media do all my programming to my hmi and dvd player. Now everything works fine. I got a fire stick connected to the hdmi input and can watch pretty much anything. Also the fire stick lets you mirror your phone.

That one has the correct usb plugs. I’d love to see it unwound to verify.Could be this one too . . PN# 84005111

It works!
The key to all of this is the DVD drive . . it is NOT the HMI (although the HMI and the DVD drive need to be programmed, and you've got to be using a 2.5 HMI). I did not connect the grey connector on the back of the DVD drive (because you can't . . they're different sized connectors between 2017+ and below), and am unsure what it's even used for at this point because all audio / video functions work perfectly.
Huge thanks to White Automotive and Media Services for programming / unlocking the 2.5 HMI and the 2017+ DVD drive.
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