BowTieBlood

I have a 2005 C6 with Onstar and originally the Bose 6-disc changer. I purchased the GMOS-04 interface adapter, but now I have lost all of the DIC, traction, memory, etc. button chimes. I was able to find one thread on here mentioning that, but it is somewhat dated. Naturally, I didn't read this post until after the fact. The only thing being installed was a Pioneer head unit.

Is there anything I can have modified wire wise to pick up these chimes? I'm a bit electronic-illiterate, but I have someone who can do this for me.

If I simply cannot get these chimes with the GMOS-04, which PAC interface adapter would I need? Will the OS-2C-BOSE provide me with all factory chimes/warnings/etc?

Think there's any chance I can send the GMOS-04 back to an Amazon vendor?

markcz

The GMOS is supposed to produce the chimes. You may just have the chime volume turned down too low to hear them, check out page 6 of these instructions

If you switch to an OS2C, you also have to buy a CM1 module to have chimes (OS2C doesn't have them built in).

BowTieBlood

Great, I will check this out tomorrow. I hope that is the issue. Thank you for the quick reply.

BowTieBlood

The guy who actually put the unit in for me just sent me the following:

"I just got off the phone with Metra, that's who makes the GMOS-O4. They told me that you lose those chimes!

There are a couple other manufactures that make the interfaces... Scosche and Pac but I don't know if they are the same way."

Any advice?

pentavolvo

gmos04 if wired right will not loose chimes

BowTieBlood

Can anyone confirm for me on a 2005 with Onstar and Bose that they have retained all of the chimes?

Just to specify, the chime for having the door open with the car still in accessory mode still works, however, hitting the button on the dash that switches between tire pressure and oil temp on the driver display makes zero noise. Likewise, the driver memory seat and traction control buttons emit no noise. I won’t be able to try the volume control (as mentioned above) until tomorrow after work.

I just talked to the installer again and he said he called Metra a second time to try and get someone else on the phone and once again they emphasized that my particular model will not retain those chimes.

I’m not trying to second guess anyone; I just REALLY don’t want to spend any more money.

Are there any wiring tricks outside of the general instructions that you guys have utilized? http://www.metraonline.com/files/pro...NSTGMOS-04.pdf

pentavolvo

thats correct with a gmos04 you get door chime but loose the buttom chimes

0Double D Mods

The OS2C and OS2CBOSE
both have chime module built in

He is better of with the OS2CBOSE

BowTieBlood

Guys, thanks for the help. We installed this issue and it seemed to cure all problems the GMOS had.

Unfortunately, a few days after install, I'm now having problems with this unit. My symptoms are as follows:

1. No warnings chimes, or sporadically working chimes
2. Radio will not play sound through speakers until 1-2 minutes in (seems to work fine after a couple of minutes)
3. No additional chimes on button push - if I push 3-4 buttons, about 30 seconds to 1 minute later I will hear a single chime

Everything worked 100% fine Thursday night after install. Is this what the technical bulletin corrects?

http://www.pac-audio.com/PACProductD...rvette_fix.pdf

Thanks in advance!

okie08vette

I put in the relay like the tech bulletin says and it fix all my issues with the sound not playing. I would recommend doing it, its cheap and easy.

0Double D Mods

The relay is not needed if its a newer version of the OS2CBOSE harness. PAC corrected this issues

LT1 Z51

Why would your installer use the GMOS-4 when the GMOS-100 exists?

markcz

People use what they're familiar with, plus they prob had a few sitting around the shop that they can charge $100 each for

traderfjp

Hi,

I know this is an old thread but I'm in the same situation as the guy who started the thread. I have a GMOS-04. I haven't installed it yet. Two different modules were mentioned. Should I get a OS2CBOSE or an GMOS-100. I'm installing a dnx890hd hu with Alpine amps and new speakers. Thanks

easyrider7467

I've had my Kenwood for a month and no time to install it.
I now have the time this weekend and reviewed my order and find that I was sent the GMOS-04.
I too, want to retain OnStar and Bose and the chimes. All the chimes.

I think I should have had the OS2CBOSE.

Well, I guess I'll be calling Double D in the morning to clarify this.

0Double D Mods

all depends on year of car, sw controls ect to what we suggest
The GMOS04 will work fine on all 05-13
the OS2CBOSE will only work on 05-2010

easyrider7467

Thanks DD,

I have a 2008 C6, want to retain bose, onstar, and all the chimes.

I purchased the Kenwood DDX790.

I'm a total noob with this stuff, my buddy installs and will be assisting me...

Thanks for your assistance.

turbosl2

So whats the verdict on the PAC vs the Metra? Those of you how installed each one, how is the sound from that little chime module? Did it fix the issue