Good and bad part of a trip

[Autoworker 74]

Took my first 100+ mile trip and looking forward to checking the milage. I had the back seats of my 2025 Lt folded down with a light suitcase laying on the right seat back. Just went by a loud truck when this really loud noise started that sounded like something mechanical under the right rear of the car. Looked in the mirror for the truck but it was way back. The tires were good and the wheels weren't hot from locked up brakes. Called OnStar for any problems but nothing. With nothing left I got out and put the seat in the upright position and it stopped. This wasn't a rubbing suitcase or anything like that. You could barely hear the radio. That seat is heavy and is hed in place by a bracket that is connected to maybe a C pillar, I don't know the weather was terrible so I haven't looked but my last thought was a body panel flexing in the wind at 50+ mph. Going to the dealership as soon as I get home. I have heard of body panels flexing before but not like this.
Also the computer which is very accurate had me at 40 MPG. I always use the CC and based on my last two Noxs that's what I was expecting.
Good and Bad

 

[Hey Vern!]

Took my first 100+ mile trip and looking forward to checking the milage. I had the back seats of my 2025 Lt folded down with a light suitcase laying on the right seat back. Just went by a loud truck when this really loud noise started that sounded like something mechanical under the right rear of the car. Looked in the mirror for the truck but it was way back. The tires were good and the wheels weren't hot from locked up brakes. Called OnStar for any problems but nothing. With nothing left I got out and put the seat in the upright position and it stopped. This wasn't a rubbing suitcase or anything like that. You could barely hear the radio. That seat is heavy and is hed in place by a bracket that is connected to maybe a C pillar, I don't know the weather was terrible so I haven't looked but my last thought was a body panel flexing in the wind at 50+ mph. Going to the dealership as soon as I get home. I have heard of body panels flexing before but not like this.
Also the computer which is very accurate had me at 40 MPG. I always use the CC and based on my last two Noxs that's what I was expecting.
Good and Bad

Sometimes the noise canceling makes noise. It functions with volume levels that may be louder than your radio level.

 

[Autoworker 74]

Sometimes the noise canceling makes noise. It functions with volume levels that may be louder than your radio level.

Yeah anything is possible but when I put the second row seatback into the upright position it went away. Somehow it's related to that second row seat being folded down. Very strange. Other than that I've had it for eleven months and it's been great.