I have a Z2 installed in a Solstice, and I used the Metra GMOS-LAN-04 to connect to the GM wiring harness. I hooked up the GMOS-LAN-04 Illumination wire output (orange) to the Z2 Illumination input. Everything works when the low beams on the car turn on - the Z2 display dims with the audio page and the nav screens go to nightime mode.
But when I switch to the high beams, the display goes back to full brightness, blinding me at night in this tiny car. Has anyone else seen this problem? I suspect a problem with the GMOS-LAN-04 programming and have called Metra. They said that I was the first