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Oct 10, 2008 | 11:16 AM

#21

pentavolvo

Le Mans Master

Joined: Nov 2004

Posts: 8,718

Likes: 20

From: Dyer IN

Cruise-In IX Veteran

Quote:

Originally Posted by mp3plc

I would like to add that the GMOS-04 from Metra doesn't work with the Kenwood 8120 or any other 5V or+ preout HU, because this device is only design to up to 4V.
When more than 4V are detected the unit goes to save mode....

I am returning mine...

not true, it deff works with the 8120 as i have done just this install.

Oct 10, 2008 | 03:09 PM

#22

mp3plc

Advanced

Joined: Nov 2005

Posts: 93

Likes: 0

From: Weston Florida

Quote:

Originally Posted by pentavolvo

not true, it deff works with the 8120 as i have done just this install.

Here is a quote of the email I got yesterday from Metra tech support themselves, after about a week of testing.

two days ago:
That will be a problem. Our interface only accepts four volts max. Anything more than that and our interface will go into a protect mode and pull the signal down, and sound terrible in the process. Try turning the gain on our interface all the way down and see how it sounds. If it sounds OK, then all is good. If not, you will have to make some choices that you may not like. Reply back with the results please and we can over some options if it comes to that.

Yesterday:
I have a possible solution for the sound if you are stuck with the GMOS-04.. Chimes I do not have a solution for though.
To get better sound, use a four channel adjustable line output converter, solder rca's onto the input, then plug those into the Kenwood radio. The output of the line output converter will already have rca's, and those will plug int the GMOS-04. That will drop the voltage to a safe limit the GMOS-04 will be happy with. Besides bypassing the amp, that is all I can recommend.

The GMoS-04 works, but doesn't sound right when you turn the volume up, is a problem with the sound and chimes gains.
Anybody that is looking for an aftermarket replacement should make their on conclusions.

Oct 10, 2008 | 03:13 PM

#23

TheKomoman

Thread Starter

Le Mans Master

Joined: Jun 2004

Posts: 9,289

Likes: 16

From: Skippack PA

St Jude Donor '13

For all the folks reading this, trust the consensus, Pentavolvo and me, use the Peripheral GMCO or if you have Onstar the Peripheral GMAH24 (or GMAH24B with Bose). They use the same Delco chipset the factory uses and work like a charm. The Metras can and do work, but I've seen more problems reported with the units themselves and especially with the complications of the installation (very poor instructions) than the other brands combined.

Dec 6, 2008 | 04:44 PM

#24

DjCritterus

Team Owner

Joined: Jan 2006

Posts: 58,551

Likes: 95

From: The warm part of Anger Island

St. Jude Donor '09

I've been trying to update my nav unit to play MP3s in my 2005 C6. At first, I put in an MP3 disc and it showed the folder, title, etc but no info. I pulled the disc and re-inserted only to receive a "no valid disc" message.

I followed the link at the top of the page on how to do the update with two images burned onto two discs. I know I burned a valid image but I get the same error message when I put them into either the cd slot or the dvd slot. Am I doing somehting wrong or is there a problem with the image? The dealerships *of coarse* are telling me I can buy the update but it's on a four week back order.

Can anybody help?

Feb 21, 2009 | 10:21 PM

#25

VetteMark

Burning Brakes

Joined: Jun 2002

Posts: 1,189

Likes: 1

From: Zimmerman MN

Quote:

Originally Posted by datadan

Has anyone added the 6 CD Changer to a C6 convertible (2008) with nav? - Part # 17802225 - I read recently that the unit supports MP3s although it’s not advertised that way.
I’m curious where the harness is (left or right storage bin and if anyone can confirm that it can play MP3s.
Thanks

Feb 22, 2009 | 04:30 PM

#26

markcz

Tech Contributor

Joined: May 2003

Posts: 7,035

Likes: 134

From: North Augusta, SC

Schematics

C6 Radio Schematics & Pin-Outs

CLICK HERE

Last edited by markcz; Mar 21, 2009 at 04:59 PM.

Feb 23, 2009 | 09:15 AM

#27

TheKomoman

Thread Starter

Le Mans Master

Joined: Jun 2004

Posts: 9,289

Likes: 16

From: Skippack PA

St Jude Donor '13

Quote:

Originally Posted by markcz

C6 Radio Schematics

CLICK HERE

Added to the FAQ.

Thanks!

Mar 16, 2009 | 07:30 PM

#28

LadyDiana1965

1st Gear

Joined: Sep 2007

Posts: 1

Likes: 0

Navigation system

can anyone tell me if I bought a 2008 C6 basic model without navigation or heads up display, would I still be able to get these parts put installed. Do all C6 come off the factory line equipped for this? or will this be a nightmare to have done. Thanks Diana

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Mar 17, 2009 | 09:11 AM

#29

TheKomoman

Thread Starter

Le Mans Master

Joined: Jun 2004

Posts: 9,289

Likes: 16

From: Skippack PA

St Jude Donor '13

I'm not trying to be a jerk about this, honest, but I will repeat that this thread is NOT for asking questions, it is a repository for links to answers. Please post in this thread ONLY if you are providing a link that you think would be useful in the FAQ. Thanks!

Diana please post a separate thread with your question, you'll have better luck getting a response.

Mar 17, 2009 | 05:08 PM

#30

TheKomoman

Thread Starter

Le Mans Master

Joined: Jun 2004

Posts: 9,289

Likes: 16

From: Skippack PA

St Jude Donor '13

Posted the new info on a wire that can be used for triggering an amp in the factory harness. Thanks to Pentavolvo & markcz for the info.

Mar 24, 2009 | 09:40 PM

#31

invitation

1st Gear

Joined: Mar 2009

Posts: 1

Likes: 0

From: albama

C6 Audio FAQ hi,

hi,
I bought a Peripheral GMCO module to install a Kenwood DNX7100 in my C6. GMCO was advertised for the non Bose non Onstar base system that I have. The instructions say to cut off the RCA connectors for a non-Bose system and hook up the high output speaker connections instead. The Chevy manual shows only low level inputs to the U66 amp. Is Peripheral that far out to lunch?

invitation letter

Last edited by invitation; Mar 24, 2009 at 09:41 PM. Reason: signatuer

Apr 14, 2009 | 09:40 PM

#32

Bob Dyble

Instructor

Joined: Oct 2004

Posts: 114

Likes: 0

From: Cedarburg Wi

2005 c6 Nav firmware upgrade - fixes FM static and play MP3s!

I would like to "Thank You" very much for this thread!!!!! It was a great help and allowed me to fix something that has been driving me nuts!!!

Apr 26, 2009 | 04:51 AM

#33

car-zone

1st Gear

Joined: Apr 2009

Posts: 1

Likes: 0

From: Alexandria New York

C6 Audio FAQ

Since this thread was started there have been lots of great work done to upgrade the C6 audio. The original thread went to bit heaven and it is being rebuilt. Here are the new and improved links and threads...

I'd like to ackowledge all of the effort TheKomoman has put into making sure that the best tips are included in this sticky. [b]Thanks Dan![B/]

C6 Audio Options (CMB13)
http://forums.corvetteforum.com/show....php?t=1474566

Cracking the NAV - what we know now
http://forums.corvetteforum.com/show....php?t=1555098

Help Crack the NAV pin codes
http://forums.corvetteforum.com/show...ht=mp3+upgrade

No sound from radio:
http://forums.corvetteforum.com/c6-c...ing-radio.html

Dead stereo:
http://forums.corvetteforum.com/c6-c...oblem-yet.html

Automatic Volume Control
http://forums.corvetteforum.com/show...ht=mp3+upgrade

Left channel cuts out when touching DIC buttons:
http://forums.corvetteforum.com/c6-c...blem-help.html

1SA radio and interface cables for aftermarket radios:
http://forums.corvetteforum.com/c6-c...a-package.html

How convert your sat radio from XM to Sirius
http://forums.corvetteforum.com/show....php?t=1733829

More recent & detailed install for SIR-GM1
http://forums.corvetteforum.com/show....php?t=1899876

How to add an AUX input into your XM radio (IPOD)

car zone

Last edited by car-zone; Apr 26, 2009 at 04:52 AM. Reason: signature

Jul 3, 2009 | 09:29 PM

#34

Anthony2006Z51

Intermediate

Joined: Dec 2007

Posts: 42

Likes: 0

From: Suffern New York

Remove factory stereo

I have bought a 2008 stereo to replace my 2006 stereo so that i could have the auxiliary jack. Does anyone know how to remove the trim and stereo o that I may install the new stereo? Thanks in advance for any help or advice.

Jul 16, 2009 | 03:27 AM

#35

markcz

Tech Contributor

Joined: May 2003

Posts: 7,035

Likes: 134

From: North Augusta, SC

REAR Speaker Swap Instructions

CLICK HERE

Jun 7, 2011 | 03:47 AM

#36

beb111

8th Gear

Joined: Dec 2005

Posts: 8

Likes: 0

Hello. Is it possible to repair a denso audio/nav system on a corvette c6 2005 after a "bad" upgrade ?
Power button and eject not responding, upgrade crash during cd2, I put the power off...
I have to change it or there is reset button ?

Jun 7, 2011 | 04:51 PM

#37

markcz

Tech Contributor

Joined: May 2003

Posts: 7,035

Likes: 134

From: North Augusta, SC

Not aware of a button, try pulling RDO fuse in the footwell for a few minutes to see if it resets.

Jun 8, 2011 | 06:44 AM

#38

beb111

8th Gear

Joined: Dec 2005

Posts: 8

Likes: 0

I already removed the battery, + and -. What will it change with removing the RDO fuse ? I will try...

Jun 8, 2011 | 06:45 AM

#39

beb111

8th Gear

Joined: Dec 2005

Posts: 8

Likes: 0

sorry for my english I'm french

Jun 8, 2011 | 09:31 AM

#40

beb111

8th Gear

Joined: Dec 2005

Posts: 8

Likes: 0

I don't have this one, maybe I can try number 31 - AMP (30a) or ECM fuse ?

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