First, let me say that this is not for the faint of heart and I accept no responsibility for your installation. If you make a mistake, youíll toast a Nav radio. That being said, if you choose to continue, here is what I did to add an AUX input to my Nav radio:
Step 1: Order the PAC AAI-GM24 harness from Logjam electronics or similar vendor.
Step 2: Have the harness drop shipped to forum member TeamSpeed for certain modifications. Although this step is not required, trust me folks, it will make your life so much easier.
Step 3: To install the module, you have to be able to get to the radio head unit. Part of the center console will need to be removed. First to go is the center console lid. Letís start with the 4 Torx screws in the console lid as shown below.
Step 4: Next, pry up on the rear of the trim plate holding the air bag warning light. It just snaps on to the console but it is plastic so be careful. Unplug the connector and set the trim plate aside.
Step 5: Remove the 2 bolts that were under the trim plate as shown here:
Step 6: Pull straight up on the emergency brake boot. This boot is held in place by 4 clip fasteners, but it will come loose with a little effort.
Step 7: Once the e-brake boot has been lifted, remove the two bolts from the console under the e-brake boot located here:
Step 8: For an automatic transmission car, the shifter needs to be put into Drive to remove the silver center console piece. Slowly start to lift the rear portion of the silver trim. I say slowly because in my case, there are 6 electrical connections that need to be unplugged. Start with the 12 volt power port in the console, next the active handling switch. Moving forward, the left heated seat switch, then the cigarette lighter, then the right heated seat switch. Last, unplug the hazard switch in the center of the air vents. The silver trim should now raise up and can be removed.
Step 9: Remove the 2 bolts on either side of the climate control. Pull forward and just let it rest on the console. The climate control has 2 tabs that fit into the radio frame so it has to be moved out of the way.
Step 10: Remove the 4 bolts on either side of the Nav unit. Place the palm of your hand under the Nav unit and lift slightly while pulling forward. You want to be very careful that nothing is going to scratch the Nav face while you have it out on the console.
Step 11: This is what the back of your Nav unit looks like. Note the Gray/Black plug on the right. That is the one we are going to replace. Press on the lock and just pull it out:
Step 12: If you have the TeamSpeed modifications, go to Step 13. If you didnít have TeamSpeed modify your AAI-GM24 harness, locate the purple wire from the GM 24 module that is spliced into the ďpass-throughĒ part of the T-harness. Cut this purple wire off of the splice, making sure that you do not cut the portion that passes from one plug to another. The purple wire should now be similar to the yellow wire coming out of the GM24 module. Plug the GM 24 harness into the Nav unit and the other end connects to the gray/black plug you removed in Step 11.
Step 13: Make the following connections from the AAI-GM24 module to the 24 pin plug still in the back of your Nav unit. It was easier for me to remove the 24 pin plug, make all the connections by pressing the connectors into the back of the 24 pin plug (Thanks TeamSpeed!) and use a wire tie to hold everything in place. If you donít have the TeamSpeed modifications, youíll have to make your own splices:
Step 14: Before you put the Nav radio back in the dash, use a small screwdriver to turn the input levels on the GM24 all the way clockwise. Also tape up any exposed wires that are coming out of the GM24 module.
Step 15: Carefully slide the Nav unit back and install the 4 bolts to hold it in place.
Step 16: Plug the RCA cable from your mp3 player in to the Yellow banded RCA plugs on the GM24 harness. The RCA plugs are labeled incorrectly for the Nav unit so the Red RCA plug from your mp3 player goes to the Black labeled RCA plug on the GM 24 and vice versa. I also used a piece of electrical tape at these connections to keep them from pulling apart.
Step 17: The GM24 module fits perfectly under the Nav radio and to the right of the climate control..youíll notice a pocket to the right of the Yaw control there.
Step 18: Route your Aux input cable under the climate control and replace the 2 bolts on the climate control as shown here:
Step 19: Youíll need to drill a hole somewhere in your console for the Aux cable to exit. I chose the inside of the console, opposite the power port. Itís your car, so you decide what works best for you. Either way, donít forget a grommet to protect your cable. Hereís mine:
Step 20: Re-connect all the electrical connections, replace the console trim and bolts, replace the console lid.
Step 21: When you power up your radio, youíll notice the standard AM, FM1, FM2, and CD buttons have been replaced with: AM, FM1/2, XM1/2, and CD/CDX. Like this:
Step 22: Start your mp3 player, press the CD/CDX button (twice if you have a CD in the Nav unit) and youíll see this screen:
Step 23: Enjoy your new Aux input!