Thread: Aux Input Solution

Just wanted to let everyone know, I just installed the PAC aPAC-GMC2 adapter in my 04 GTP and it works great. It plugs directly into the factory head unit, adds 2 AUX input channels and retains the use of the factory XM as well.

Apparently, this product replaces the discontinued PAC AAI-GM24 interface.

For reference, my GTP has the monsoon system with an in-dash 6 disk changer and factory XM.

Hope this info helps.

This looks sweet! Ive been wanting to do this forever.. but it costs 140 for the parts alone thats insane

Originally Posted by tayl5645

This looks sweet! Ive been wanting to do this forever.. but it costs 140 for the parts alone thats insane

Amazon is your friend: Amazon.com: PAC aPAC-GMC2
No other parts necessary, took about 15 min to install.

Thats a little better lol I may have to do this eventually then my phone can power my listening habits of my music ADD . Dont get me wrong 6 cds works for a while.

Im assuming you just had to pull the head unit and plug it right into the back?

Originally Posted by tayl5645

Thats a little better lol...

Cheaper than a new head unit and all the associated stuff needed to keep OnStar, chimes, factory amp, steering controls etc. working.....


Yes.
It is completely plug and play.
Toughest part was finding a place to tuck the additional bulk of wires to get the head unit back in.

It works through the XM source, so you select XM1 as the source then press SEEK UP and it scrolls through XM, AUX1 and AUX2.

PAC lists a different version that does 1 AUX and 1 iPod: uPAC-GMC2

They do not list GP as being compatible, however, they don't list GP as being compatible with the aPAC-GMC2 either....

http://www.grandprixforums.net/threa...ighlight=input

Aux install for 10$ or free if you have the cables already. Still in my car playing great.

did you even read the write up?

I did and it doesn't work if you don't have the XM option. I've been looking for a solution for my 05 GTP for a while. The car has the base stereo/cd with no onstar and no monsoon. My requirements are the factory steering wheel controls work (correctly), the gauges don't flip out and no other weird issues. I'll lose the date but that's the only comprise I'm willing to endure.

What part? all you need is aux cord that can reach into the cabin. The xm module is in the trunk left side

The AAII-GM12 adapter is designed to be used with Monsoon systems that have either external CD player or XM (Note: the XM source is actually a separate receiver module inside the dash). The GM AAII-GM12 audio adapter easily hooks up by unplugging a connector at the back of the head unit (the connector that goes to the XM receiver and/or the external CD player), plugging the cable from the AAI-GM12 into that connector on the back of the head unit, and then plugging that cable connector that you just unplugged into the connector on the AAII-GM12.

So basically the GM adapter intercepts the stereo analog audio from the XM and/or Ext CD player, and injects your own external audio into the head unit. To use it, you turn your Monsoon stereo head unit to XM (or external CD if applicable), and then depending on the switch setting (i.e. the switch that comes with the GM adapter), you either listen to XM, or your own external audio! The adapter's switch is actually a 3 position switch --- to choose the source audio (i.e. XM and/or CD), or your own external audio 1 or external audio 2 (that's right, you can provide TWO different external audio sources to this thing!) No soldering!

For the person that asked me about installing the external audio jack into head unit... it's fairly easy. 1. Remove the head unit 2. remove the bottom cover. 3. look inside and you'll see an unused area on the head unit faceplate that you can drill a small hole, and mount your external audio jack into it 4. mount the jack 5. mount the GM adapter behind, or near the head unit, inside the dash 5. Put the head unit back in and Rock out!

I must say that I was a bit disappointed that the GM adapter's internal gain is not as high as it should be. In other words, when you go from radio or XM to your external audio, you'll notice that the external audio is not as loud... so you'll need to turn the volume on your external source audio up pretty high. I wish they'd designed a gain control inside that GM adapter, but alas they didn't..... Still, for the price and easy install, it's worth it.... and if you are able to feed a strong signal into your external audio jack it sounds really good!

Just to add --- If your stereo system does not have any external device connected to the head unit (e.g. XM receiver, external CD changer), then there is NO external audio feeding in to your head unit and your options for adding an external audio input are limited. IF your system has a working cassette player, then the BEST option for external audio is to use a cassette adapter (that thing that looks like a cassette but has an audio cable coming off of it). It actually sounds really good, much better than a real cassette (if the player's head is aligned right, that is). If no working cassette player, then next option is to use an FM modulator. They only sound as good as FM (and that's if it's a decent modulator and you can find a blank channel on your local FM). Otherwise your looking at either replacing the head unit or modifying the factory unit to add an external input and switch; this would require a schematic and knowledge of electronics circuitry.

Hope this helps.