smdva

I have a noticeable noise coming from the fuse box every time I apply the brakes. The dealer informs me this is the way the braking system is designed and the noise in normal.
Can anyone confirm their 2013 C6s do the same? Is there a fix even it is "normal"
Thanks, Steve

RicK T

Yes, very common complaint......but interestingly not all cars do it and not all the ones that do do it are equally offensive.

Here's one member's recent solution:



Here's a pic of the relay, located in the fuse panel in the passenger footwell, under the toe board:





If you're really industrious, another member went so far as to replace the mechanical relay with a Solid State Relay. Took some adapting but doable, and it's silent. If you want that thread let me know.

gbrtng

My 2013 coupe makes a chattering relay type of noise when I hit the brake pedal before pushing the start button. I haven't localized the noise but it seems to be coming from the center of the dashboard assy. Is this the noise everyone complains about? It lasts about one second and then is silent. Car has less than 300 miles and I think it was there from the beginning.

Take two - Chatter noise when hitting either the brake or start with no fob. Sounds like the noise is inside the dashboard near the start button.

JCtx

On the brake relay, I'm the one who wrapped it in 'Dynamat' and problem solved. Wanted to do the same with the reverse relay, but nobody has replied to my post, so will leave it alone. For some reason, the reverse relay is under that black cover with a bolt in the middle.

That relay racket when hitting the start button without the fob or without fully depressing the clutch (or not at all) is puzzling to me. Sounds like a hundred relays triggering all at once. And yes, right behind the panel, not by the fuse box. But perfectly normal too.

Mike's LS3

I heard that same noise after I opened up the fuse box in the passenger foot-well. After a few hard WOT, I no longer hear it. Maybe because my wife was trying to put the brakes on her side?

smdva

Thanks for the input, ordered Hushmat tonite.
smd

jkbronco

I hate to be the least bright one in the forum but can someone explain exactly what was done?

JCtx

Let's say the relay measures 1 sq. in. Cut a 1" x 3" piece of Dynamat (or similar) material, and cover the relay on one side, top, and the opposite side. Then cut two 1" x 1" squares and put them on the remaining 2 sides, and make sure to leave no gaps. I used black HushMat for the center tunnel (my car is CE black), and did this job with leftover pieces. Wanted to do the same to the reverse relay, but it's under that large cover with a bolt in the middle, so didn't want to mess with it. And don't have enough material left to do that entire black part, but might buy more and do just that. Good luck.

jkbronco

Thanks a lot - any worries about trapping heat?

JCtx

Not inside the car man, with A/C. And how long do you stay on the brakes? Plus it's not much current at all, and there's a gap at the bottom anyway. Zero worries here.

bucwheat

My 2012 doesn't make the noises.

jkbronco

wow--- mine does