[Neverenuff]

Originally Posted by Rknapp12

Neverenuff, that's exactly where it is. Mine seems to be in the middle of the right rear. How did you fix the problem? Do you need to remove the diffuser?

I haven't fixed it yet. I found the cause of the noise by accident when I was installing my exhaust. When I first noticed the noise I thought it was the styrofoam in the trunk. After I ruled that out, I figured it had to be the rear exhaust hangers/isolators and replaced them. I would have never guessed that the sound was coming from the rear diffuser. I'm going to get under there this weekend and spray some silicone lubricant on the fasteners and see if that helps. I will post the results.

[DanielG]

Please review link, is this what your car sounded like?

https://youtu.be/FfLjG57WtOQ

[SSDanny]

I noticed that noise got significantly more obvious when I installed the coilovers in my car. The shocks are more stiffer, so maybe that's why the noise intensified. Maybe it's a suspension component?

[NightSkyCode]

Every time I drive my car I hear a new squeak. Usually plastic on plastic stuff. LOVE the car, but wish GM did a better job at QA and engineering the interior noises.

[sludaddy]

Originally Posted by NCSD

I've got a new creak when I accelerate or let off the gas. Sounds like the body seam is creaking. Maybe the seat rocking back and forth. It just started so I'll try to figure it out. Maybe the door striker plate needs grease?

Hey guys just took my 2017 1LE in for this exact problem. The creaking sound seemed to originate from the passenger back seat area just below where the seat belt retracts into the C post. Drove me bonkers. Easy to replicate, creak when accelerating, creak when letting of gas. Was like driving a rocking chair. I ripped out the interior from the back seat to trunk. Lubed up all friction points I could underneath the car. I finally threw in the towel and took it to dealer today. They were able to hear the sound, did some research and found a service bulletin that fit my problem to a tee. There are 3 spot welds that weren't performed during manufacturing to the inner body which result in body flex and the creaking sound. The fix is to drill out 3 3/16 holes from inside the car and weld them proper. My car is supposed to be done tomorrow. I will report the results.

[Chutzpah]

Originally Posted by sludaddy

Hey guys just took my 2017 1LE in for this exact problem. The creaking sound seemed to originate from the passenger back seat area just below where the seat belt retracts into the C post. Drove me bonkers. Easy to replicate, creak when accelerating, creak when letting of gas. Was like driving a rocking chair. I ripped out the interior from the back seat to trunk. Lubed up all friction points I could underneath the car. I finally threw in the towel and took it to dealer today. They were able to hear the sound, did some research and found a service bulletin that fit my problem to a tee. There are 3 spot welds that weren't performed during manufacturing to the inner body which result in body flex and the creaking sound. The fix is to drill out 3 3/16 holes from inside the car and weld them proper. My car is supposed to be done tomorrow. I will report the results.

This is by far the worst car I've ever had relating to quality "CONTROL". I emphasize "control" because if someone was doing thier job, this car would be a runaway best in class. Way to many creaks, rattles, fit finish and minor programming / mechanical issues. These issues tarnish the fantastic performance characterstics of the car.

[meyouand987.2]

There are 3 spot welds that weren't performed during manufacturing to the inner body which result in body flex and the creaking sound

Are you kidding me? Hopefully they catch mine on fire while welding it and i can get rid of this rattle trap! It is driving me insane! I bought this so I would not drive my Cayman R as much..I wish I would have kept my '15, it had almost no issues.

[sludaddy]

Originally Posted by sludaddy

Hey guys just took my 2017 1LE in for this exact problem. The creaking sound seemed to originate from the passenger back seat area just below where the seat belt retracts into the C post. Drove me bonkers. Easy to replicate, creak when accelerating, creak when letting of gas. Was like driving a rocking chair. I ripped out the interior from the back seat to trunk. Lubed up all friction points I could underneath the car. I finally threw in the towel and took it to dealer today. They were able to hear the sound, did some research and found a service bulletin that fit my problem to a tee. There are 3 spot welds that weren't performed during manufacturing to the inner body which result in body flex and the creaking sound. The fix is to drill out 3 3/16 holes from inside the car and weld them proper. My car is supposed to be done tomorrow. I will report the results.

Result report: Creaking noise solved. The fix was applied and I joyfully drove the car home without any creaking noise whatsoever. After further diagnosis, the squeak came from panels that are near the rear seat back hinge. My issue was on the passenger side only. My dealer did an awesome job with sticking with it and coordinating with GM for the resolution. I could not be happier.

[Stex]

Originally Posted by sludaddy

Result report: Creaking noise solved. The fix was applied and I joyfully drove the car home without any creaking noise whatsoever. After further diagnosis, the squeak came from panels that are near the rear seat back hinge. My issue was on the passenger side only. My dealer did an awesome job with sticking with it and coordinating with GM for the resolution. I could not be happier.

can you be a little more specific on the repair as in what they did to the panels etc... thank you..

[EarthToGreg]

My creaking noise was recently fixed. Although, there does seem to still be a faint creak, especially on harder pulls. Not sure if I’m just fixating at this point though, since it is 10x’s better than before I took it in for the dealer to fix

[Stex]

^ The fix was????

[Hyperlinkblue]

I have two problems, 1 a creak when I accelerate and 2 a squeak when the cars warned up and the rear suspension goes up and down just like the video that was posted in this thread. Problem 2 was the rear parking brake cables / isolator where theres a 1/16th in piece of steel welded to the frame and bent to hold the cable/ isolator in place. When you push on the suspension this would move slightly and squeak. I cleaned and lubed this part and all is good. Just follow the cables from the rear brakes and youll see what im talking about. Then move it with your hand while under the car. Problem number 1 with the creak im still trying to find. I hear it could be from under the rear seat, a piece of seat pan that is not glued or welded, but i have to check!!

[soldes]

Mine started squeaking yesterday. like you described exactly like two pieces of styrofoam rubbed together. It did get louder with the back seat down. I wedged the jack tray, didn't help as mentioned before. The sound which sounded similar occured when i pushed the left and rear vertical panels. At the top near the rear trunk opening there's a pine tree clip in the vertical direction, they got probably got dislodged. Snapped them back in place and I couldn't hear the squeaking anymore this morning.
Another place to look at maybe?
Nick

[Rknapp12]

Soldes- Any way you can post a picture of this. Is it in the cabin or in the trunk?