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34K views 49 replies 24 participants last post by  nonniandpoppicrafts  
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#1 ·
I bought a new Traverse back in October and I've brought it back 8 times for the same issue. The Car Randomly makes a very loud humming noise. Chevy or the dealer has not even tried to fix it. The most they've done was take the roof racks off which is ridiculous! It's in the drive line. MY wife and i are filling out the lemon law papers for it. I've Chevys my whole life through the same dealer but never again.
Rob
 
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#33 ·
I am having the same issue with my 2018 traverse 3LT AWD, started around 3000k miles but it was so loud I literally thought it was another car next to me making the noise. It has been to the dealer 5+ times, they have replaced some parts and this last time they are replacing the entire exhaust system to see if it fixes it. They have heard the loud humming noise at least twice now and agree that it is not normal. Seems like they are going back and fourth between what they think is causing the noise. {Exhaust, firewall, or drivetrain} Will follow up once I get more information. This is super frustrating because we bought a new car so it wouldn't be in the shop the entire time. Also #TomCat this is defiantly not normal FYI so unless you have a 2018 traverse maybe don't comment like its normal.
 
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#34 ·
Bobcat77 said:
Also #TomCat this is defiantly not normal FYI so unless you have a 2018 traverse maybe don't comment like its normal.
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Thomcat has a 2018 Traverse Premier Redline edition.

I also have a 2018 Traverse Premier Redline edition and have had no issues with my vehicle.

I suppose that like any other vehicle, regardless of brand, some have defects and other don't.

Sorry to hear you are having all these issues.
 
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#36 ·
So narrowing my 2200 RPM noise issue a bit. Dealer pulled fuse to entertainment system and while it is off there is no noise. It appears to be the ANC system and some flaw that causes feedback just before the tranny wants to shift. With the ANC off you can hear a slight but acceptable strain. The ANC seems to be amplifying it through the back speakers instead of canceling it. They are replacing the ANC unit and we’ll see how that goes.
 
#37 ·
Re: my previous post: "Of course there is always the remote possibility that it is a defect in the active noise cancellation system built into the audio system which would make normal ambient noises more pronounced rather than muted. But, that would sound more like a loud booming noise which was not the problem noise described. ANC is always active, just like the Nav, directional and warning noises even when the radio is muted or OFF. In that case a simple test might be to pop the RDO fuse in an attempt to cut out all speaker noises including the ANC's inverse wave generation for noise cancellation....... I say might because I don't know if ANC goes through the same fused amplifier as the other audio sounds"


Sound like that may be it!......problem is whether they know how to correct it...source may not be where amplified noise is coming out but where it is picking up the noise...changing the ANC unit (alone) may not fix the problem. They must also address the known microphone that feeds the counter wave issue to the ANC problem instead of just screwing with the ANC unit. There's info regarding the '16-'18 Malibu (neither my '16 or '18 Malibu had/have this problem),


https://sandyblogs.com/techlink/?p=10528



Possible that poor mic placement or attachment in the area above the Traverse headliner may be picking up sounds from the metal body that are actually increasing exhaust noise at certain frequencies.. And the funny thing is I don't get the exhaust humming noise but do get the booming described only on a single FM channel, so there must be some commonality to all GM ANC systems.
 
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#40 ·
I have a 2018 Traverse Redline (25k miles on it) and have the same issue. I was thinking it was a transmission issue and that it was slipping or not engaging fully, but after reading about the exhaust resonance, that makes sense. I do notice it is usually when we are fully loaded with the whole family and gear and driving on the highway around 60 to 70 mph and around 8th gear. It is usually lower RPM, but haven't noticed exact RPM, but will pay attention now. It doesn't happen when my wife is driving, but she is usually driving around town or work by herself, so not fully loaded under load conditions. I hope it is just exhaust resonance and not transmission issues, especially with GM's transmission reputation. Replacing transmission right now in my 2014 Silverado with only 77k miles on it.
 
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#41 ·
up906 said:
I have a 2018 Traverse Redline (25k miles on it) and have the same issue. I was thinking it was a transmission issue and that it was slipping or not engaging fully, but after reading about the exhaust resonance, that makes sense. I do notice it is usually when we are fully loaded with the whole family and gear and driving on the highway around 60 to 70 mph and around 8th gear. It is usually lower RPM, but haven't noticed exact RPM, but will pay attention now. It doesn't happen when my wife is driving, but she is usually driving around town or work by herself, so not fully loaded under load conditions. I hope it is just exhaust resonance and not transmission issues, especially with GM's transmission
up906 said:
I have a 2018 Traverse Redline (25k miles on it) and have the same issue. I was thinking it was a transmission issue and that it was slipping or not engaging fully, but after reading about the exhaust resonance, that makes sense. I do notice it is usually when we are fully loaded with the whole family and gear and driving on the highway around 60 to 70 mph and around 8th gear. It is usually lower RPM, but haven't noticed exact RPM, but will pay attention now. It doesn't happen when my wife is driving, but she is usually driving around town or work by herself, so not fully loaded under load conditions. I hope it is just exhaust resonance and not transmission issues, especially with GM's transmission reputation. Replacing transmission right now in my 2014 Silverado with only 77k miles on it.
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My 2019 redline did the same thing. I recently tried some of Exxon highest octain fuel after a couple tanks it seems to be gone. I wounder if the valves started to chatter and the anc kicks in and tries to drown out noise. Try it see if it helps and let us know.
reputation. Replacing transmission right now in my 2014 Silverado with only 77k miles on it.
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#42 ·
My 2019 redline did the same thing. I tried a couple tanks of Exxon highest octain fuel and so far it seems to be gone. I think that it might be the valves rattling sometimes when climming a incline and maybe the anc is kicking in to try and drown out valve noise.Try a couple tanks and let us know. Hope it helps
 
#46 ·
I just bought a 2018 traverse high country with 30 k on it. We went on a trip to white mountains while driving along at around 70-75 I would make this crazy loud humming / drone sound almost like a fog horn. It only does it randomly and only at highway speeds. While it was at dealer they couldn’t reproduce it. Checked wheel bearings lose sheilds. But nothing. I think its an exhaust drone noise imo.
 
#48 ·
Hi. I have had my 2018 Traverse in 6 times for this. I’m about to set the car on fire. (Joking of course) I see that this has been an issue from the start and we have had issues since we got it. Do Chevy and gmc mechanics not get this information? Why do we have to do their jobs???!!!??? Anyway, I see everyone was asking for a recording, (nevermind, it won’t let me attach files) I did this a ways back. I have a video of the noise I made for the dealer. My car is currently in for the same issue AGAIN!!
 
#50 ·
Anyway, after reading this whole feed, there is no help other than to find out that my car isn’t the only one. That I appreciate. Thank you. It is not the ANC, the tires, ‘the cheap exahaust’ or any other guess that is stated here. All these and more have been ruled out. I have driven lots of manual transmissions and motorcycles and this is not the sound. It is an issue!! If and when the mechanics actually do their job and fix it, I’ll let you know so the next person finds help.
In the future, please be helpful as we are spending serious time and money on our vehicles. ;(
 
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