LJD51

after the one that came with the car was replaced under warranty today due to a non-functioning automatic volume control (AVC)...

Picked the car up this evening and popped in a CD with MP3s just for sh*ts 'n grins. VOILA...music comes out of the speakers...

Obviously the replacement headunit is an '06 model and I was fortunate enough to get it.

So, if you really want a replacement, verify if your automatic volume control is not functioning and if it isn't, get it replaced under warranty.

Realtor Dan

what automatic volum??

burtonbl103

Any pics?

Mocoso

LOL! Damn my automatic volume isnt working but I didnt want to go through the effort of the dealer... then again Ive yet to hear someone mention their automatic volume works at all...

Velocity Jonny

Funny this should come up tonight, because this was the night that I tried an MP3 disc in my 06. Worked perfectly.

I don't think my automatic volume is working though. And I can't seem to dim my instrument panel lights. That little switch is crap, and does nothing, as far as I can tell. It's a practical joke on simple people like me.

Seriously, can anyone dim their panel lights?

dsl

Try holding the **** after rotating it counter-clockwise. It should dim after a couple seconds. But you have to hold it. ... I think.

dsl

How do they verify it's not working? Don't you have to set the volume while on the highway, then exit the interstate or something? It's such a suttle thing ...

jkonkle

AVC is something that you can set from low, medium to high. It works on all the "cheaper" radios. As you accelerate the volume should adjust according to calculated "road noise" by the designers. It doesn't actually know how much noise there is, just assumes it's happening. HIGH gives you big jumps in volume.

Mine has never worked, but when I put the top down the radio makes a big jump in volume. Compensating for the top being down of course!!

HTH - I may ask them to work on my radio when the transmission is out next week. I'm getting a viscious hummmm/whine.

JK

gota07

It doesn't work like a volume control. The switches contacts only connect at the end of the ****'s rotation. The longer you hold the **** to the extreme left or right the more the lights are dimmed or brightened.

burtonbl103

Do you have the nav ?

Velocity Jonny

Yes, I have NAV.

LJD51

Although the new OEM HU plays MP3s now, the fricking AVC is still not functioning .

According to the car owner manual (page 3-80), the nav system manual (page 3-3) and low and behold, GM Customer Service, there should be four buttons to choose from after pressing the "Audio/Adjust Screen" button on the left of the HU under the "NAV" button.

I called the service writer and he is going to have the "radio man" who replaced the HU call me when he comes in.

If I have to take it back for another replacement, I will make sure they give me another '06 HU.

More to come.

jazzlove

Read your manual...

masihman

John, I agree. My HU doesn't display any of the buttons for level. I only can turn it on or off. Doesn't work really well either.

C5ROADRUNNER

I assume the BOSE radio with in dash CD changer has the ACL has the low-med-high variable settings. On my NAV version I can't find anything other than ON or OFF choice on the screen.

Should I also assume the NAV's ACL attenuation range is not very dramatic? I recall the C5 radio range was quite noticeable.

I would love to take the NAV unit to the dealer and use this as an excuse to get the '06 NAV that is MP3 capable. The delays for the upgrade are unreasonable and likely just a smoke screen for something that will never appear. I HOPE I AM WRONG!!!!!!!!!!!!!!

I tried out this feature and could tell no difference ON or OFF. The NAV manual claims it works best at lower levels. How do we prove it's not working?

0corvette pilot

my 1sa speed controlled volume doesn't work either.

Need 4 Speed

sweet deal.

abrimberry

When your head unit was replaced, did you lose your saved NAV locations? Thanks.

shopdog

The Nav radio doesn't work the same as the 6CD changer radio. It uses a system called Audio Pilot. It has a microphone that listens to ambient cabin noise and adjusts the volume to compensate for the noise it "hears". All you have is an on or off control.

The test you're supposed to do to check if it is working is to sit in the car with the radio on and the Audio Pilot feature turned on, then turn the heater fan to maximum. The radio volume should increase. The change is subtle, and it isn't instantaneous. You have to wait a few seconds for it to change. (It works off a running average, otherwise impulse noises would pump the radio volume up and down in an annoying way.)