C8 problems
Burning Brakes
Joined: Sep 2014
Posts: 976
Likes: 1,080
Ooops... Anyone who has one i would check the front wings.
https://www.youtube.com/watch?v=KnHETIadGJE
https://www.youtube.com/watch?v=KnHETIadGJE
On the 458 these similar wing are designed to flex and redirect air flow at speed.
Seem similar in design so there maybe a level of flex designed in even with proper fastener?
Team Owner
Joined: Feb 2013
Posts: 22,598
Likes: 14,555
Ooops... Anyone who has one i would check the front wings.
https://www.youtube.com/watch?v=KnHETIadGJE
https://www.youtube.com/watch?v=KnHETIadGJE
Melting Slicks
Joined: Oct 1999
Posts: 2,181
Likes: 420
From: Ponte Vedra Beach FL
Melting Slicks
Joined: Jun 2012
Posts: 2,226
Likes: 1,029
From: Thomas Texas
Also, the bottom bolster on the drivers left side was pushed over far enough to pinch my upper left thigh causing significant pain. I keep changing my seating position and pushing it away. Hasn’t gone away completely but it’s better. I was planning to take out the seat and modify the foam but that may not be necessary.
Racer
Joined: Jul 2012
Posts: 397
Likes: 56
From: Sebring Florida
After the 4500 rpm break-in period my tach went to 6500 redline as it is supposed to. When I got home and pulled into the garage, I noticed the check engine symbol on the right side of the IP was lit. No chimes or warning messages, just the lighted check engine symbol. Not sure how long it was on because steering wheel blocks that area probably because of the way I have seat and steering wheel adjusted while driving. I had driven about 15-20 miles after the tach did its advance to 6500. Anyone else have a CEL after engine break-in period of 500 miles?
Racer
Joined: Jul 2012
Posts: 397
Likes: 56
From: Sebring Florida
I tried turning on the tilting feature of the side view mirrors. When I put the car in reverse, the mirrors tilted downward to give a view of the ground and rear sides of the car. Fine. Then when I shifted into DRIVE, the mirrors stayed tilted down. Owner's manual says they should return to normal position when shifting out of reverse. I turned the tilting feature off and have not yet retried it.
Racer
Joined: Jul 2012
Posts: 397
Likes: 56
From: Sebring Florida
Had the top off and that resulted in a very offensive glare coming off the silver aluminum strip that runs along the top of the glove box area. Probably need someone to make a decal to cover that aluminum strip. Carbon fiber look would work nicely. Also, after the top was stored in the trunk for about an hour or so, it was quite hot to the touch when I went to put it back on the car.
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Burning Brakes
Joined: Mar 2012
Posts: 1,094
Likes: 702
I tried turning on the tilting feature of the side view mirrors. When I put the car in reverse, the mirrors tilted downward to give a view of the ground and rear sides of the car. Fine. Then when I shifted into DRIVE, the mirrors stayed tilted down. Owner's manual says they should return to normal position when shifting out of reverse. I turned the tilting feature off and have not yet retried it.
Heel & Toe
Joined: Sep 2019
Posts: 18
Likes: 41
Transmission problem
Hello Folks,
To keep it short, not good news..... My car is now in the service department for a full transmission replacement. My odd/even gear issue reappeared and GM immediately decided to swap the transmission and to send back my transmission for forensic work. Apparently they have identified a failure with something inside the transmission preventing the odd gears to engage and only keep changing bt even gears. For additional details on my issue you can see my earlier posts. While I am not happy about having to go thru this, I commend GM for the decision to replace the transmission and to send it back to fully understand this issue to prevent a potential painful recall situation in the future. I wish GM technical support contact me directly for a dialog on my situation and for ways they can compensate me for this very unfortunate situation.
I will keep posting as get more updates. omeprazole Magnesium
C8PRO
To keep it short, not good news..... My car is now in the service department for a full transmission replacement. My odd/even gear issue reappeared and GM immediately decided to swap the transmission and to send back my transmission for forensic work. Apparently they have identified a failure with something inside the transmission preventing the odd gears to engage and only keep changing bt even gears. For additional details on my issue you can see my earlier posts. While I am not happy about having to go thru this, I commend GM for the decision to replace the transmission and to send it back to fully understand this issue to prevent a potential painful recall situation in the future. I wish GM technical support contact me directly for a dialog on my situation and for ways they can compensate me for this very unfortunate situation.
I will keep posting as get more updates. omeprazole Magnesium
C8PRO
Instructor
Joined: Apr 2006
Posts: 176
Likes: 123
From: Long Island, NY
Had the top off and that resulted in a very offensive glare coming off the silver aluminum strip that runs along the top of the glove box area. Probably need someone to make a decal to cover that aluminum strip. Carbon fiber look would work nicely. Also, after the top was stored in the trunk for about an hour or so, it was quite hot to the touch when I went to put it back on the car.
If so That’s a problem...melted luggage!
Pro
Joined: Mar 2020
Posts: 575
Likes: 324
Race Director
Joined: Aug 2016
Posts: 12,751
Likes: 10,184
From: Garden Valley CA
I tried turning on the tilting feature of the side view mirrors. When I put the car in reverse, the mirrors tilted downward to give a view of the ground and rear sides of the car. Fine. Then when I shifted into DRIVE, the mirrors stayed tilted down. Owner's manual says they should return to normal position when shifting out of reverse. I turned the tilting feature off and have not yet retried it.
Sometimes the car would recognize my wife's fob first instead of mine when we got in the car. The controls would start moving to her position scrunching me into the steering wheel (half the time my knee would hit the trunk release and I'd have to get out of the car to close it). I'd have to hit my memory position button to stop movement and then hit it again to get everything back to my position. But the mirrors would start to tilt back then stop after moving from reverse to drive. Not a good situation when you didn't know this happened and try to do an aggressive freeway merge into traffic - all you see is asphalt in the mirror.
I could repeat this at the dealership.
The diagnosis: Operating as designed - the car wasn't designed to have 2 fobs in the car at the same time.
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
Sucks.
Racer
Joined: Jul 2012
Posts: 397
Likes: 56
From: Sebring Florida
I believe it was from the trunk being next to the engine compartment because even if I was driving in sunshine, the trunk lid is between the sun and the trunk with the top stored in it. Has anybody else noticed a hot trunk compartment (especially you people who are in a milder northern climate, not Florida like I am)?
Instructor
Joined: Apr 2009
Posts: 105
Likes: 53
From: Fort Wayne IN
First drive
On my first drive after delivery I had to stop behind a mailman and the C8 began honking at the poor mailman or the guy "oncoming" incessantly then it stopped and it never did it again....?
Instructor
Joined: Apr 2006
Posts: 176
Likes: 123
From: Long Island, NY
I believe it was from the trunk being next to the engine compartment because even if I was driving in sunshine, the trunk lid is between the sun and the trunk with the top stored in it. Has anybody else noticed a hot trunk compartment (especially you people who are in a milder northern climate, not Florida like I am)?
Safety Car
Joined: Jun 2009
Posts: 4,430
Likes: 155
From: Rain Festival Headquarters, Upstate NY
Was driving my C8 yesterday, stopped at a friends house for a few minutes. When I restarted the engine there immediately was a noise from the left front fender area that was a combination squeal / grinding sound. Frunk hood was up and my friend verified from outside the car that the noise originated under the left front fender. It lasted perhaps 5-10 seconds until I mashed the start engine button to kill the motor. I restarted and everything was fine. Drove the car this afternoon and had several engine start / stop/cycles, everything fine.
What motorized item item is located in the left front fender area?
What motorized item item is located in the left front fender area?