What radio was installed? How was the install done (what sort of adapter(s) was/were used)?

 

The radio was a Sony double din. The radio does not appear to be the issue. The adapter was a PAC from Crutchfield. I did some more messing around and without the radio even installed, if I plug in the PAC adapter the whole dash goes black. The only part of the adapter that causes issues is a red plug. It has 5 wires going to it. 2 purple, a white, a white and black and a green. Only the purple seems to connect to anything on the car side. The other 3 go to empty sockets.

 

Certainly sounds like something ain't right with the PAC module. Are you sure it's the right thing, and not for a non-NAV car?

Just searching back through old threads, I found this guys for sale ad in which he mentions that he used 2 different PAC modules - For Sale - 04-07 CTS - Double Din Nav Kit - Retain DIC -.... (I think the '06/07 cars had steering wheel stereo controls, so maybe that's why?)

A couple threads that might help? I don't know, just a couple I came across of folks that have done aftermarket stereo installs.

The complete guide to 1st gen CTS Navigation unit...

I have put together a definitive list of all the information we have on installing a double-din nav unit in the 2003-2007 Cadillac CTS while retaining the factory DIC. Included in this list are my own contributions along with the works of several other brave men who sacrificed time, expensive...

www.cadillacforums.com

The journey to achieve decent Navigation and quality...

Well, I figured I should provide the info I said I would in a previous post. I ranted about the stock navigation unit sucking and hating it so badly. I decided to pick up the Stock head unit out of a base CTS that has an external DIC (driver information center). Everything I have read so far...

www.cadillacforums.com

I know there are a number of other threads in this forum and in the CTS-V Appearance Mods forum.

 

Thank you.