I'm installing the factory nav as we speak. I've got everything hooked up but the 2 wires that go into the back of the onstar box. I got my harness kit off ebay and I have no clue where the 2 wires go into the back of the onstar box. I've read every post back and forward, but there isn't anything specific. Mine did not come with instructions or with pictures like the ones from JP Customs. Please someone tell me what to do. If someone has the instructions just for this please email me or post them. Again, I've already done everything else like ran my nav antenna, spliced into the VSS wire. All I need is to know where to stick the two wires on the back of the onstar box. Please be specific as I don't have any instructions with my harness.

 

Okay i figured out all the wiring for the onstar box to the C1 plug. Now I am ready to connect the nav. I have three plugs to plug into the back of the nav. All four slots are the same, which plugs go where? Pretend you are sitting in the driver's seat and looking at the front of the nav unit. Which plug goes in which hole? I don't have rear DVD, so I know one will be blank, but which one?

 

https://chevroletforum.com/m_5604/tm.htm

 

https://chevroletforum.com/m_15129/tm.htm

 

Landon, I've read both of them, and I've finished running every wire. I'm just left with connecting my 3 plugs now. On the back there are 4 slots. Which slots do the 3 go in? Which slot is skipped?

 

Sonny Post which wires you connected for the rear of the onstar box. In the second post from Biglg he referenced a thread that has a plug break down. It will be on page two. The power plug c1 goes to the right side of radio. I think the third plug would be blank, but I really cant remember on that part.

 

Good that is what I have. The third one blank. The first two are the ones that originally were plugged into the old radio and the fourth one I plugged the new Brown VSS plug into.

 

but which ones did you connect to the rear of the onstar box?

 

Here is a pic of how they go on a loaded 07 Tahoe/Yukon, yours may be missing the white connector.




[IMG]local://upfiles/6980/671F5080AB45471385C8DCE52C96855A.jpg[/IMG]

 

each plug should fit into only 1 slot. you should not be able to plug it in wrong. there should be notches on each plug that match up to only 1 slot