Thanks for the suggestion! Any are appreciated. Unfortunately, this had no correlation with the noise in mine. My noise is lower in the rear and manipulating headrests had no effect.I seem to have a thump or clunk at times from the headrests, especially the passenger one. May want to check there.
Shifting between R and D or accelerating right after R then into D does not induce on mine. Mine is only induced by getting in and out of the car, wiggling in the seats, or going over bumps and cracks at low speed.Don't know if it's the suspension, but there is a definite thump when I shift from reverse to drive right when I start to move forward. And I did come to a complete stop fyi. Also when I brake on the heavier side.
So did you get this resolved? I have the exact same issue. Car seems to make a popping noise in the rear end when the weight settles in the rear. Noticeable right before coming to a full stop and when taking off from a full stop. I can also hear it as I exit the vehicle sometimes.Don't know if it's the suspension, but there is a definite thump when I shift from reverse to drive right when I start to move forward. And I did come to a complete stop fyi. Also when I brake on the heavier side.
For me it’s never gotten resolved either, even after making a case with GM regarding this pop/thump noise in my 2016 Malibu. Definitely getting worse every 10k mi. The pop sound has been present since 1700mi. Now I’m at 52k and it’s just obnoxious. Of course the dealer says they can’t replicate the noise in shop. But at rolling speeds, especially when the weight of he vehicle shifts to prepare for a stop or for acceleration, I get one or two pops that are really metallic coming from the rear. It used to only be something I could hear, now I can hear it and feel it. Something is wearing. I wish the stealership would just take my money and fix the issue instead of dancing around it.I may be ahead of many of you all in miles, I'm at the 73,000 mile mark and mine also started as a thump, it gets worse to the point it sounds like a pop sort of like a bushing popping or the frame popping in the trunk area, especially around the 1-10mph speeds, can be recreated the most while backing up and turning in either direction, it sounds like when the tires are getting filled with air and make that popping sound when they are adjusting to the rim... I can notice it also when getting out of the car it makes the popping sound, we got it up on a lift and everything suspension wise underneath seems fine, you can park the car and push the body around from the back end and push down and sometimes if your lucky it will make the popping sound, so I believe it has to do something with the suspension or frame since the sound can also be recreated with the car off in park and not moving at all, the sound has gotten very very loud now
The noise mine made was fixed a long time ago. It was fixed at the same time they replaced the fuel tank. It has been totally quiet and normal when I wiggle in the seat or roll over little bumps. There is also a bulletin should your noise resemble 2x4s slappin'.
#18-NA-136 - Loose Lumber Type Noise Heard From the Rear of the Vehicle Over Bump (May 31 2018)
Haven't heard it in my car, at least not yet. What would trigger the sound, something like going over speed bumps?@tnmats In mine it wasn't that bulletin - I just added that as it was new. Mine was fixed one of the times they replaced my fuel tank trying to figure out the inconsistent fill. No idea what they fixed. It was there, then it was gone. It was probably a loose shield they took off to drop the tank. Or a tank strap. Or the filler tube.
That #18-NA-136 bulletin adds a thick washer between the shock and the shock mount rubber to each side. It focuses the area of housing contact so the washer makes contact with the mount not the housing of the shock. The "loose lumber" must be the housing of the shock thunking. I have heard this sound in many Malibus, mine even sounded similar.
According to the bulletin it is just an intermittent noise that sounds like hollow lumber when travelling slowly over sharp bumps. Something that would cause a quick jolt rather than a smooth rolling bounce. Mine was obviously something loose but for those that may have some noise perhaps that bulletin can help?Haven't heard it in my car, at least not yet. What would trigger the sound, something like going over speed bumps?