What is the difference between the "dimmer" wire and the "dash lights" wire coming out of the GMCO? And which should go to the "illumination" wire on the AVIC D-3?
I tried it yesterday. It seems both lines from GMCO do not work. Even I don't get 12V from both lines when I turned on headlights. One of members suggested to use tail lamp signal.
I would use the wire to the orange LED behind the passenger's sunvisor for the AVIC-D3 illumination wire. I tapped into the parking light indicator at the instrument panel because that is where I had to get to the VSS wire with my 2LT non-bose single CD 2006 Coupe. The way I did it, the AVIC-D3 goes into night mode when the headlights are on. The better way is to use the Vette's signal to turn on the interior lights for night mode like the orange LED.
To illustrate why this is an issue, if you are running wipers the headlights come on after 15 seconds, even if there is a lot of ambient light.
I would use the wire to the orange LED behind the passenger's sunvisor for the AVIC-D3 illumination wire.
I like your idea here... I will be attempting to install an AVIC-Z2 into my 3LT, C6 in the next few days. (My first NAV install... done other basic stereo installs before)
Any ideas, on the best way to route a wire up to that light? IE: How, and what I would need to remove??
I sure hope I haven't gotten in over my head! Most of the install seems pretty straight forward... Thanks in advance for any help!
I like your idea here... I will be attempting to install an AVIC-Z2 into my 3LT, C6 in the next few days. (My first NAV install... done other basic stereo installs before)
Any ideas, on the best way to route a wire up to that light? IE: How, and what I would need to remove??
I sure hope I haven't gotten in over my head! Most of the install seems pretty straight forward... Thanks in advance for any help!
Hi USAF_C6,
I haven't wired mine to the orange LED -- I was simply pointing out that the way I wired the illumination wire didn't turn out to work they way I thought it would. And of course in answering that question I exposed the fact that I do drive my Corvette in the rain!
You can remove the screw that holds the orange LED and the visor bracket and pull it out to get to the wire. I ran a microphone wire for the cellular bluetooth adapter up from the passenger's footwell up behind these windshield moldings so there is plenty room to get another wire from the visor down to the head unit via the footwell.
The only other tip I can give you (because I blew it on my install and had to redo it) is that the Corvette has a power antenna. Not a power retractable antenna, but an amplified antenna. So if you do not connect the power antenna lead on your head unit to the Corvette wiring harness, your AM/FM reception will be really, really bad.
hey guys I am installing my D3 this weekend as well, I have a few questions if someone would share knowledge with me and thanks for the tip for illumination.
Where did ya all mount your GPS antenna ?
Are you using the RCA plugs on the GMCO, I have bose and was told by knowlegable sourse that would work.
As to the antenna, I have mine at the windshield in the center of the dash. You could also use the center channel cavity for a "stealth" install (assuming you don't use the center channel for on-star etc...)
On the AH switch, there are only 3 wires, I remember it being obvious, but I will guess it was the green wire... I did check it with a dmm though...
I ran my mic and put a drop of hot glue to the bottom center of the mirror, it works great! Now I can swivel it to my direction or the passenger for clarity, also, its hardly noticeable...
Thanks for the pther tips, I'm off to get some supplies and get started.
There's a cavity around the speaker that's in the middle of the dash. It's a logical place to stow it since the antenna can "see" through the dash itself. The factory NAV antenna is more or less in that location.
I don't know if you actually need to remove it to put the antenna there, but the grille over the center channel comes off fairly easily. There are clips on either end plus a couple on each side in the middle. Pry around the edges of it carefully. The one thing to keep an eye on is the sun sensor there - there's a wiring harness attached to it so it gives it a short leash. It is easily detached from the sensor so you can pull the whole grille off.
There's a cavity around the speaker that's in the middle of the dash. It's a logical place to stow it since the antenna can "see" through the dash itself. The factory NAV antenna is more or less in that location.
I don't know if you actually need to remove it to put the antenna there, but the grille over the center channel comes off fairly easily. There are clips on either end plus a couple on each side in the middle. Pry around the edges of it carefully. The one thing to keep an eye on is the sun sensor there - there's a wiring harness attached to it so it gives it a short leash. It is easily detached from the sensor so you can pull the whole grille off.
Thanks Dan, well I got most of the wiring done today including running the wire to rear taillight. I tested the AH switch and it didnt have much voltage it seemed, so I ran it to the rear. I did get the D3 to play music as I wanted to be sure before wired everything, sounds great thanks for the RCA tip.
I put both antenna's right on top of the middle a/c vents, saw another thread where a guy did that, they fit good and looks nice & neat.
Put the bluetooth behind radio velcrowed to firewall area.. fit great.
Put the sirius in the fuse box cavity right under the bose amp.. it to fit great there. Just a few connections in the morning and it should all work.. hopefully. It's beer thirty now.
Corvette Store
AVIC-D3 to GMCO harness?
Most of the install seems pretty straight forward... Thanks in advance for any help! 
