Traverse Forum banner

1 - 17 of 17 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter #1

·
Registered
Joined
·
106 Posts
That's strange (and a bit scary).
The article from that link suggests this might be related to the Automatic Noise Cancellation system?

I have heard that it is possible for an ANC system to amplify instead of cancel certain frequencies, especially if a vehicle has had modifications (aftermarket exhaust / intake systems, in one case someone added an aftermarket subwoofer and then had to disable his ANC, a late model Malibu).

If you haven't made modifications; it is also possible the ANC system itself has developed an issue. Somewhere; I have read that the ANC microphones in the headliner could be at fault...?

Will you be taking it in to the dealer (with a hard copy of that linked article)?
 

·
Registered
Joined
·
7 Posts
Discussion Starter #3
I added front and rear bumper guards when I first got my Traverse , that's about it . The Traverse has been running beautiful until now . The pressure I felt was like being in an airplane . The wierd part is my wife didn't feel any different .

I'm going to do a process of elimination on my own first before I go to the Dealer . Thanks for your input .





That's strange (and a bit scary).
The article from that link suggests this might be related to the Automatic Noise Cancellation system?

I have heard that it is possible for an ANC system to amplify instead of cancel certain frequencies, especially if a vehicle has had modifications (aftermarket exhaust / intake systems, in one case someone added an aftermarket subwoofer and then had to disable his ANC, a late model Malibu).

If you haven't made modifications; it is also possible the ANC system itself has developed an issue. Somewhere; I have read that the ANC microphones in the headliner could be at fault...?

Will you be taking it in to the dealer (with a hard copy of that linked article)?
 

·
Registered
Joined
·
1,698 Posts
Not exactly sure; but I believe @Thomcat has found a way to pull a fuse, to temporarily shut down the ANC system?

.02

The hyperlinked article indicated that disabling the ANC (pulling the RDO fuse) was the first thing that was done and it didn't make a difference, but a good start.



Carsickness is nothing new to adults, children or pets. Usually the result of second row seating directly above the rear axle, although in the Suburban, just as with the '18+ Traverse, the second row seating is forward of the rear axle. Our old Trailblazer second row seating riders would get a little queasy on long trips which I attributed to getting constantly "humped" by the rear axle motion.



The "buffeting" noise in the article is atypical and nothing an ANC can compensate for since it appears to be pressure related. Some people will be more susceptible than this than others. Looks like the dealer in the article is pi$$ing away money trying to fix it without using a rational approach. First thing that I'd do is to place a carbon monoxide detector and manometer for measuring air pressure in the closed vehicle, remove any roof rack crossbars and then take it for a ride. If CO intrusion and poisoning is causing the nausea it will show on the detector. Variations in pressure caused by poor sealing of the hatch, windows, doors or firewall or defective HVAC seals will show as fluctuations on the manometer. If they're OK then the problem is noise not air pressure related and next steps progressively are to check the rubber seal on the leading edge of the hood for tightness, the underbelly to assure any skid plates and air trim tabs weren't removed and chucked during the last oil change, fold the mirrors, disable the aero shutters in the open position, place easily removable painters masking tape over the front windshield seals, especially in the bottom corners where there are two shaped plastic deflectors (if these deflectors are loose or missing, there will be noise!) and in a last desperation cross rotate the tires and retry. Good luck because I doubt the dealer will take this approach.



All that being said - on occasion I will get that exact "buffeting" sound, unrelated to this complaint?, coming through the speakers in the Bose system.....more to do with the cheapo front end on the radio but might be aggravated by the ANC function.....only get the noise on two stations and the buffeting noise sounds exactly like what I used to get on my ham radio requiring use of a BFO (beat frequency oscillating) knob to quiet.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #6
I think I found the reason for me getting sick in my Traverse . Today was the first time in 2 days since I got sick in the Traverse , that I've been in my Traverse again .

So I remote started the Traverse this morning as I always do . I went downstairs and into my Traverse 20 min after remote starting it . Almost immediately after putting on my seat belt I felt my ears closing up and pressure in my chest and head . I cracked the window open a little and headed for the highway . After about 15 min of driving I felt better again . I closed the window and everything was still ok .

I racked my brains out trying to figure what was causing my sickness , then a light bulb went off . On Wednesday when I first got sick I remembered someone parking right on top of my bumper , I was pissed . I also remember remote starting the Traverse and letting it run for over 30 min . Because my Wife wasn't ready to leave yet . I was overtired that morning so I didn't realize I felt like **** because of something with the Traverse .

While I was driving this morning I kept thinking of similarities to Wednesday morning . This morning another car was inches away from my bumper again . My Traverse this morning was remote started and running for only 15 min . So my sickness cleared up pretty fast . I'm now thinking because these cars were so close to my bumper when my Traverse was running with the heat on . That carbon monoxide got into the Traverse . I will find out later when I go to pick up my wife . No one can park behind me now because I'm parked in front of a driveway.

Here is and article that I found explaining symptoms that some people , not all , can get from exposure to carbon monoxide :

https://www.asha.org/uploadedFiles/AIS-Chemical-Exposure-Effects-Hearing-Balance.pdf
 

·
Registered
Joined
·
48 Posts
I think I found the reason for me getting sick in my Traverse . Today was the first time in 2 days since I got sick in the Traverse , that I've been in my Traverse again .

So I remote started the Traverse this morning as I always do . I went downstairs and into my Traverse 20 min after remote starting it . Almost immediately after putting on my seat belt I felt my ears closing up and pressure in my chest and head . I cracked the window open a little and headed for the highway . After about 15 min of driving I felt better again . I closed the window and everything was still ok .

I racked my brains out trying to figure what was causing my sickness , then a light bulb went off . On Wednesday when I first got sick I remembered someone parking right on top of my bumper , I was pissed . I also remember remote starting the Traverse and letting it run for over 30 min . Because my Wife wasn't ready to leave yet . I was overtired that morning so I didn't realize I felt like **** because of something with the Traverse .

While I was driving this morning I kept thinking of similarities to Wednesday morning . This morning another car was inches away from my bumper again . My Traverse this morning was remote started and running for only 15 min . So my sickness cleared up pretty fast . I'm now thinking because these cars were so close to my bumper when my Traverse was running with the heat on . That carbon monoxide got into the Traverse . I will find out later when I go to pick up my wife . No one can park behind me now because I'm parked in front of a driveway.

Here is and article that I found explaining symptoms that some people , not all , can get from exposure to carbon monoxide :

https://www.asha.org/uploadedFiles/AIS-Chemical-Exposure-Effects-Hearing-Balance.pdf

Not sure where you're located, but, now that the Winter is all but over, why would you be remote starting your car in the first place? Doesn't seem to serve a purpose unless your vehicle is outdoors and is really cold. Why don't you try to not use the remote start and get used to it.

On the other hand, assuming that you are parked outdoors, even if there is a vehicle parked right on your ass, something isn't right if the exhaust is getting into your vehicle.
 

·
Registered
Joined
·
1,698 Posts
GM used to promote their flow through ventilation system....vent is always slightly cracked and fan on ultra low speed......commercials would show a smoke bomb lit in the interior with windows shut and within a few minutes the interior was cleared of smoke. Could be using the same system and f exhaust curls under the car could find its way into the HVAC system, especially if set to heat on with remote start where the fan will run.




Worth a few bucks to throw a CO detector into the closed interior to verify it is just a unique parking and not a chronic problem. The High Contry comes with a trailer hitch behind the bumper. A small cutout in the bumper closeout and a Weathertech Bump Stop in the hitch will keep a distance and prevent marring of the bumper.
 

Attachments

·
Registered
Joined
·
1,698 Posts
Not sure where you're located, but, now that the Winter is all but over, why would you be remote starting your car in the first place? Doesn't seem to serve a purpose unless your vehicle is outdoors and is really cold. Why don't you try to not use the remote start and get used to it.

On the other hand, assuming that you are parked outdoors, even if there is a vehicle parked right on your ass, something isn't right if the exhaust is getting into your vehicle.

Rectangular exhaust finishers on the High Country/Premiere are straight out the rear bumper. If someone parks on your a$$ the exhaust gases curl under the frame ad end up close to the front vent intake.




Always use the remote start for two reasons - a failed remote start is an alert alert there are stored trouble codes in the computer; and affords me the decision which vehicle to take - tell the wife: "I'll lock up - get in the one that is running....."
 

·
Registered
Joined
·
7 Posts
Discussion Starter #10
I did order a CO detector a few hours ago on amazon , thanks for your helpful input .


GM used to promote their flow through ventilation system....vent is always slightly cracked and fan on ultra low speed......commercials would show a smoke bomb lit in the interior with windows shut and within a few minutes the interior was cleared of smoke. Could be using the same system and f exhaust curls under the car could find its way into the HVAC system, especially if set to heat on with remote start where the fan will run.




Worth a few bucks to throw a CO detector into the closed interior to verify it is just a unique parking and not a chronic problem. The High Contry comes with a trailer hitch behind the bumper. A small cutout in the bumper closeout and a Weathertech Bump Stop in the hitch will keep a distance and prevent marring of the bumper.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #11
It's still in the 30°s on some days around 5:30 Am in New York when I drive the Wife to work . She's always cold and likes to get into a warm car .

I think I found the reason for me getting sick in my Traverse . Today was the first time in 2 days since I got sick in the Traverse , that I've been in my Traverse again .

So I remote started the Traverse this morning as I always do . I went downstairs and into my Traverse 20 min after remote starting it . Almost immediately after putting on my seat belt I felt my ears closing up and pressure in my chest and head . I cracked the window open a little and headed for the highway . After about 15 min of driving I felt better again . I closed the window and everything was still ok .

I racked my brains out trying to figure what was causing my sickness , then a light bulb went off . On Wednesday when I first got sick I remembered someone parking right on top of my bumper , I was pissed . I also remember remote starting the Traverse and letting it run for over 30 min . Because my Wife wasn't ready to leave yet . I was overtired that morning so I didn't realize I felt like **** because of something with the Traverse .

While I was driving this morning I kept thinking of similarities to Wednesday morning . This morning another car was inches away from my bumper again . My Traverse this morning was remote started and running for only 15 min . So my sickness cleared up pretty fast . I'm now thinking because these cars were so close to my bumper when my Traverse was running with the heat on . That carbon monoxide got into the Traverse . I will find out later when I go to pick up my wife . No one can park behind me now because I'm parked in front of a driveway.

Here is and article that I found explaining symptoms that some people , not all , can get from exposure to carbon monoxide :

https://www.asha.org/uploadedFiles/AIS-Chemical-Exposure-Effects-Hearing-Balance.pdf

Not sure where you're located, but, now that the Winter is all but over, why would you be remote starting your car in the first place? Doesn't seem to serve a purpose unless your vehicle is outdoors and is really cold. Why don't you try to not use the remote start and get used to it.

On the other hand, assuming that you are parked outdoors, even if there is a vehicle parked right on your ass, something isn't right if the exhaust is getting into your vehicle.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #12
I had to use the Traverse again today . So I used the remote start and let the car run for 15 min before I got in . No ear pain or nausea at all , everything was normal .
I had parked in front of a driveway so no one could park behind me . So that means some how , when a car parks inches from my bumper , carbon monoxide is getting into my Traverse .

When my CO tester comes Monday I will park the rear of my Traverse inches from the front of another car and test for carbon monoxide .
 

·
Registered
Joined
·
1,265 Posts
It could come from the tailgate not sealing properly. Just changing the subject a bit when I was pulling my travel trailer with my Uplander I could smell the cat rotten eggs odour when I was passing someone on the highway because the trailer was just behind the vehicle. Just like you can get passed by a cop car going to an emergency with the gas pedal down to the floor.
 

·
Registered
Joined
·
1,698 Posts
It could come from the tailgate not sealing properly. Just changing the subject a bit when I was pulling my travel trailer with my Uplander I could smell the cat rotten eggs odour when I was passing someone on the highway because the trailer was just behind the vehicle. Just like you can get passed by a cop car going to an emergency with the gas pedal down to the floor.

A good point. A poor hatch seal along the lower edge won't cause a water leak into the interior but could cause exhaust entry by blow-back from the exhaust finishers directly up against a rear car's bumper. Wouldn't hurt to verify by seeing how well the seal grabs a sheet of paper with the hatch closed.
 

·
Registered
Joined
·
118 Posts
OP should also know that even with recirc closed, when the HVAC is set to any position other than top vents only, the recirc is still partially open and pulling in outside air. So if you're setting your HVAC to high or full blast for a remote start on any vent setting other than only top vents only, you're pulling in quite a bit of outside air.

Of course, your intake vents are at the front of the vehicle, but as mentioned, it could be pulling in from under the car and pulling in your own fumes. Much the same if you remote started in a small enclosed garage for 15mins.
 

·
Registered
Joined
·
242 Posts
If you are getting ear popping, it's usually because a air pressure issues.

If there is air flowing over on opening in the car, (vent air intake, open window, cracked open sunroof, etc...) this outside air flowing over an opening in the car is trying to suck the air out of the car faster than it's going into the car via other openings. This briefly lowers the pressure inside the car and causes the ear popping effect and nausea. The Bernoulli principle.

In our vehicles, you get get a more exaggerated version of this by opening a single rear window 4 to 6 inches with no other openings in the vehicle. Very painful on the ears.

So a similar issue seems to be occurring with a smaller opening somewhere in your car.

BTW, if you do a quick google search, you will see that it is a common issue with newer cars these days.
 

·
Registered
Joined
·
34 Posts
I had a similar issue in a 2019 Cadillac CTS. I found that the "sound" would disappear when the HVAC controls were set to off. It proved that the issue was a pressurization of the extractors in the back of the vehicle by the exhausts pulses for that vehicle fighting with the HVAC fan trying to push air into the vehicle. I solved it by extending the exhaust 2 inches. It would be very interesting if you could try yours with the HVAC completely off and see if the "sound" goes away.
 
1 - 17 of 17 Posts
Top