Hmm well thats no good. That's probably why I couldn't find much info on it. But I guess i can use this HU in my Avalanche. I'll research ideas on relocating the MIL, if too involved, I'll just get an Android.

Which adapter harness do I need for either?

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2000 e39 M5 Titanium on Black
2006 e53 M54 Titanium on Black
2007 e83 Black on Black Sport pkg
2004 Avalanche 2500 lifted 4.88 gears
1994 jacked up Jeep
1987 GMC lifted short bed on tons