I have a C7 convert with an off and on like metal dragging noise in front end. Sounds like metal a loose fan hitting a fan cage. Does not do it all the time, just once in a while and at no particular speed or up or down hills. Just random.

Anybody have anything like this?

tmh68528

 

I am having an issue where my iPod freezes and I have to hard reset the iPod to get it to work again only to have it freeze again. That was an iPod classic. I tried an iPod touch and have the same problem. Both are current generations. Both the classic and the touch work fine in my 2015 Tahoe. It looks like there have been similar problems but not exactly. I guess I will take it to the dealer and see what they can do. There aren't any problems with Bluetooth streaming. Hmm..

 

Dealer replace eLSD control module yesterday!
Now all is well with the world.
Service Rear Axel warning is no longer coming on.
Track Modes are available.
Thanks,
MacMulkin & GM

 

I have a 2014 Stingray. I drove it from Kerbeck (Atlantic City) to CA to ship to Hawaii.

Shortly after picking up car and driving it in HI, I noticed that between 1200-1500 rpm with very slight throttle, there was a noise that sounded like a vibration from under the hood. This occurs in all driving modes. It will not do it if the engine is simply rev'd in neutral. It will not do it under full throttle. Since at highway speeds in HI (55) this is where the rpm is and is very annoying. It is not constant. It only occurs when cursing at this rpm and light throttle is applied.

Could this be detonation?

 

I just posted a similar issue that occurs between 1200-1500 rpm under light throttle. It is a metallic sound.

 

I had the exact same issue on my 2014 C7 vert, but it seems to have resolved itself....

 

Mine had gas smell at 200 miles. Leaking injector. Replaced by dealership with no further problem.

 

maybe cylinder deactivation

 

This same problem has just started for me. Have you any further information?

 

I just started noticing that same rattle/metallic sound at around 1,400 rpm.
What have you done to resolve it?
I have 2,300 miles on my C7 Z51

I am taking it to the dealer tomorrow.

Penske Chevrolet in Indy diagnosed it with a bad belt tensioner.
Apparently it is pretty common. I have not gotten the car back to see if that fixed it though.

 

I have the same problem from 1200 to 1500 RPM! Just traveled 1300 mi. and it is getting louder. I am not on my home computer so could someone in Customer Service please contact me on this blog.

 

So I was washing my 7 month old C7 3LT Z51 on Saturday and got sick when I saw a spidering crack at the rear edge of the driver's door, about 1/3 down from the top. Today, I immediately went over to the body shop I've used for years - a very high end shop that does almost exclusively Benz, Ferrari, etc. Believe it or not, the owner told me to take the car to Chevy. He thinks the composite material failed? He saw no signs of an "impact" or chip in paint and showed me with a straight-edge that if something had hit the door, it would have hit the door at the "high" spot, which this is not. I'm so upset, but wondering if anyone else has this problem? You can clearly see that it is a very thin area of composite.

Just sick about it...

 

I have a vibration?/rattle? noise that occurs between 1200-1500 rpm with very little throttle (at all speeds). Someone else said that they had this problem which to them sounded like the blades of a fan hitting a fan cage. That sounds about right. They also said that this went away on its own. Still don't know what it is or what to do about it. Could it be pre-detonation? Doesn't sound like it, but what else would just go away.
Any recommended gas treatment for this.
I live on Big Island of Hawaii and gas is lousy.

 

I had this issue and it was a faulty belt tensioner. There's a bulletin the dealer can pull up. Search this forum for belt tensioner for more info.
The noise occurred for me when in V4 at those rpm's.

BTW-Congrats on your new C7! Was just on Maui and didn't see any C7's.

 

vin 7069
there is a distinct vibration/rattle that occurs at approximately 1200-1500 rpm

it occurs in all driving modes
it occurs when the car is cruising & there is a slight acceleration
which is right where it is on the highway
it will not occur if the engine is simply rev’ed in neutral

 

My oil pressure "jumps" (a momentary pressure rise lasting several seconds) about 10 psi to occasionally 15 psi AFTER, not during, upshifting, as the engine warms. It happen slightly after (maybe a second after, maybe a little less) the next gear is fully engaged and will remains high for a second or two before dropping. The fluctuation seems to be higher in the lower gears, where the difference in engine speed is greater.

It only happens as the vehicle is warming up, during easy to moderate acceleration, in the lower gears, with a shift point at, say, under 3000 rpm. It may happen at much higher rpms or hard acceleration, but I don't normally drive it hard before its warmed up, so I don't know if it happens under those conditions.

The oil pressure does not always jump by the same amount, but there is a noticeable jump of 5 psi or more when I watch it under these circumstances. In other words, the magnitude of the jump is somewhat variable. What is more regular is that the jump (on average) is minor when the engine is colder, and as the vehicle warms, it increases (on average, to about 10 psi or more) then decreases again as the water temp reaches operating temperature.

It starts to happen maybe a half mile, maybe less, from home. If I continue driving for, say, five miles, when the water temperature reaches normal operating temp, the fluctuation disappears.

It also happens after the car has been warmed up, then parked for ten-fifteen-twenty minutes. When re-started, it happens right away with no additional warmup (remember, it's already somewhat near operating temps). On the restart, the jump may last for a minute or so.

Two notes here -
This is not caused by over-revving between shifts - it will happen with the rev matching engaged (I seldom use rev matching).

The vehicle voltage does not change when this happens - the voltage remains normal throughout.

Any ideas?

 

I have same prob. Dealer is going to disassemble, paint and reassemble.

 

C7, manual, Z51 with mag. sel. ride, VIN 8228, delivered Jun 20 2014, less than 100 miles.
A vibration is evident at 1900 RPM in the body and prominent in the shifter. Occurs in various gears when accelerating, decelerating, steady RPM and in neutral.
Anyone experience this?

 

2600 miles clunking/popping maybe this metal sound everyone is talking about? Mine happens after 2500 rpms and car is down on power! VIN 21578. Car is currently at Dealer waiting to be tore apart to be diagnosed

This needs to be re-called!

 

Did you get this fixed?
I had a rattle at 1,400 rpm and it was a bad belt tensioner. It will be fixed tomorrow, hopefully!