[m6-lt1]

Originally Posted by haggler

Did you ever figure this one out? I have a '23 with something similar. I thought it was the ground air dam rubbing but I have that removed. I recently installed sway bars but they should be tight to spec but I'll have to check the rears again.

No, if the salt washes away and I don’t get more snow I will try another dealer in a couple weeks. Did yours start after the sway bar install? If so maybe something is just not seated correctly? That’s what I think my issue is since it started on day 2 of owning the car. I doubt anything is worn.

[haggler]

I think the issue started with the sway bars. First I thought the sound was coming from the front. The problem I thought was the torque spec listed was wrong on the GM performance kit I bought with the sway bars. I used blue loctite and torqued the front bottom link to 96 ft/lb per the service manual. I also retorqued the top to be everything from the factory was tight.
Now when I enter my same driveway, only sometimes does it make that popping noise as I approach at a 45 degree angle.
I am going to try and torque the rear end links this weekend with blue loctite. The torque spec on those is way less (30-40 ft/lb), but I was being lazy and didn't have room with the car on the ground to get torque wrench on it. I am going to re-torque every bolt related to the sway bars.

Let us know what you find out. I'm particularly interested since mine is also a 2023.

[haggler]

I think I found my issue. I checked the rear sway bar mounting brackets and I don't think I torqued them down enough. The right side was very loose and not even torqued. They specify 43 ft/lb torque for these but since they were only 10mm bolt I was suspect on cranking them down. I probably only had 20 ft/lb on them max. The front bracket bolts only take 16 ft/lb, but they go directly into the sub frame. The rears have a welded nut.
My best guess is when the car went on 3 wheels in the driveway it caused some movement and clanking. If it continues, I'll re-torque the end links because my new crowsfeet haven't arrived yet.

[m6-lt1]

Originally Posted by haggler

I think I found my issue. I checked the rear sway bar mounting brackets and I don't think I torqued them down enough. The right side was very loose and not even torqued. They specify 43 ft/lb torque for these but since they were only 10mm bolt I was suspect on cranking them down. I probably only had 20 ft/lb on them max. The front bracket bolts only take 16 ft/lb, but they go directly into the sub frame. The rears have a welded nut.
My best guess is when the car went on 3 wheels in the driveway it caused some movement and clanking. If it continues, I'll re-torque the end links because my new crowsfeet haven't arrived yet.

Glad you found the issue. Second dealer didn’t find anything. I actually haven’t heard it the last 3 times I drove the car. Not sure if it’s fixed or not but I have been driving my car harder now that I hit 1500 miles. If I don’t hear it again then I think putting more load on the suspension from driving it harder on curves may have gotten something to “seat” as nothing was found loose and my car only has 1500 miles so I don’t think anything is worn.