Arctic Blastoff

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Ok so first out of no where when i changed to track mode from stealth it did not change the sound an then i got a whinding noise while goin straight then it went away an the comes back every cuple minutes,it seems when i turn i can hear it coming from the rear drivers wheel.blown differential or something messed up with the exhaust valves?i can not catch a break with this car,i dont want to complain all the time,i like the car
Sound is at 16 sec in

OVR60

GM will be more than happy to correct your problem. GOOD LUCK

Arctic Blastoff

Whats your take on it

<<427_V8>>

Did you get down and take a look underneath just to make sure it's not something simple like a loose cable, or a piece of lodged plastic in the wheel well?

Arctic Blastoff

Yes,it all started when changing drive modes while driving.Trackmode sounded silent even when i gave it full throttle once so back to a different dealer again as i just had my worst experiance at another one.

JMB

Have you done anything with your brakes or lowering?

Arctic Blastoff

I lowered it but never had an issue in a year,i have heard of some people rubbing in the front after alignment but this was happening while doin straightaways as well.

Poor-sha

Incredibly stupid question but have you looked to see if the baffles are actually open in track mode? What about when the car is off? If they are closed can you push them open (car off, exhaust cool)? Maybe they are just stuck.

I know on the C6Z they were closed by vacuum pressure and as a result would usually fail open. I don't know if the C7 is the same but I would look underneath at the linkage and connections.

I don't have any clue on the other sound but it could be something rubbing back there.

Arctic Blastoff

It has to be the baffels being stuck theres no other explanation as to no sound in track mode.i have no clue how to open them manually if you could snap a pick that would be awsome. Im never changing modes while in gear an driving again as i dont think thats what it was intended for.

RS4EVA

only other explanation would be that you accidentally set the exhaust mode to always be in Stealth, no matter what driving mode.

That's pretty hard to do by accident though.

jaden61

You do know how to open manually through the "Infotainment" engine management, YES?

jaden61

WEll yes , duh, because you do say stealth, not tour. the noise is quite odd.

Arctic Blastoff

I think its the baffle tryn real hard to open an kinda fluttering.Even in stealth mode they are suppose to open but It felt like it was goin back an fourth between open an close.

Poor-sha

I'm suggesting using a stick or your finger to push on one side and see if it swivels. I'm not sure whether the left or right side pushes in and unfortunately I don't have my car here or I would try it and snap a pic.

GP1224

Drive to your dealership and find out.

Arctic Blastoff

You mean like where the exit opening is right?i didnt know if it was farther down or what but i do remember seeing the diagram.

Arctic Blastoff

I just picked it up from the dealer a cuple days ago after them having it for 10 days for unrelated issue an now i have to work so not until sat or fri if they give me a loaner which they didnt last time an it sucked.

Poor-sha

I know you can reach it on the C6. I'm pretty sure you can on a C7 as well but have never tried.

Trawicked

Here's your baffle. It’s probably getting stuck.

Arctic Blastoff

Moved both baffles back an fourth for about 2 min an no problems,yet.i would highly advise against changing modes while in motion.