my line in is the XM wire splice write up using $5 of radio-shack parts, liked below
http://www.grandprixforums.net/how-a...-xm-21849.html
the mp3 nav update is a two disk two step process but your unit may be partially compatible as is... i found the update on a corvette c6 forum
i have linked the files onmy dropbox, you will need to burn the .iso files to two separate disks and follow the instructions
i did the update but only needed disk one, as it states if you already have the update on disk two, disk two will not start the update. so after using only disk one, i can now listen to mp3 cds.
files:
http://dl.dropbox.com/u/16054037/%23...2C%202005).txt
http://dl.dropbox.com/u/16054037/Disk1.iso
http://dl.dropbox.com/u/16054037/Disk2.iso
The firmware update is relevant for 2005s ONLY and corrects the static that sometimes occurs while listening to FM. In these instances, momentarily switching to AM and then back to FM gets rid of the static. The bigger win from doing the firmware update, though, is that it provides the head unit with MP3 disc playability. It's great being able to play CDs with over eight hours of music on them!
A couple of important things to remember before doing the firmware update:
- It should only be done on 2005 models.
- It should only be performed ONCE. Attempting to perform the update on a head unit that has already received it could cause permanent damage to the head unit.
- The instructions MUST be followed to the letter; any deviation could cause permanent damage to the head unit.
Here are the complete instructions:
2005: Service Bulletin: Poor and/or No Radio Reception, Intermittent Static on FM with Navigational
Radio System (Update Radio Software)
Service Bulletin #: 05-08-44-014A
Date: December 9, 2005
Subject: ASI Resolution - Poor and/or No Radio Reception, Intermittent Static on FM with Navigational Radio
System (Update Radio Software)
Model(s): 2005 Chevrolet Corvette (Domestic and Export) with Navigation Radio
Condition
Some customers may comment on the following conditions:
" Static is heard on stations with an otherwise strong signal, after the ignition is turned on.
" The radio is unable to stop at specific stations when using the "seek" function.
Correction
DO NOT REPLACE THE RADIO
Important: The software is updated using a CD, not through SPS programming. New software, P/N
15853651, can be obtained from GMSPO. Dealers should retain the service CD for future use.
The software update will do the following:
" Modify the signal interface with the ARS module to correct the reception condition.
" Add an on-screen message to remind the customer that a destination is required before a route can be
planned.
" Add MP3 functionality.
The navigation/radio software, P/N 15853651, should be updated using the following procedure:
Important:
" This software can ONLY be used for updating the 2005 Corvette navigation radio, P/N 15263014. Do not
use these CDs to update any other vehicle's navigation radio. The radio part number can be verified via the
Tech 2®.
" Software CDs and a Tech 2® are required to complete this procedure.
" Use of latex gloves is recommended to avoid fingerprints on the products and/or discs.
" If the vehicle is turned "off" during updating, the "software updating" process may not work and a new
navigation radio will be required.
Follow the steps below to complete the software update.
Turn the ignition "on" with the engine "off" by holding the ignition switch in "ACC" mode for at least 10
seconds.
Open the tilt screen (navigation screen) to gain access to the DVD drive.
Eject the navigation DVD from the DVD drive (bottom slot).
Important: It may be necessary to close the radio screen for Disc 1 - Navigation to begin operation. If the
navigation software version in the navigation radio is the same or higher than v.1312, the software updating
will not start.
Insert Disc 1- Navigation software version 1312 into the DVD slot.
"Preparing to Load System Software" is displayed on the screen along with a progress bar. It will take
approximately 5 minutes for Disc 1 to load.
After Disc 1 - Navigation has completed the navigation system will automatically restart. Eject disc 1 from the
DVD slot. Insert Disc 2 - Audio software version 01.0F into the DVD slot.
1/2
Important: Approximately 10-15 seconds after inserting the disc, the screen will go blank. It will appear that
the radio has shut down and/or locked up. This is the mode the radio will go into when the software is
updating. If the audio software version in the navigation radio is the same as v01.0F, the software updating
will not start.
When Disc 2 is completed, the system will automatically restart. It will take approximately 5-10 minutes for
the system to restart. Remove Disc 2 - Audio from the DVD drive.
Turn the vehicle off. Open and close the driver's door and wait for 60 seconds.
Turn the vehicle on and reinstall the customer's navigation DVD.
Press the "NAV" button on the navigation radio, then press the "Agree" soft key on the screen.
After the map screen is displayed, touch the map screen the confirm that the map can be scrolled.
Using the Tech 2®, clear any/all DTCs from the radio.
