The contact owns a 2018 Chevrolet Traverse. The contact stated that when the vehicle started, the engine made an extremely loud sound and smoke came from the exhaust. The contact stated that the vehicle sounded like a motorcycle. While the contact's wife was driving the vehicle, there were fumes from the exhaust entering the cabin of the vehicle. The contact stated that his wife had asthma, and the fumes affected her breathing while driving the vehicle. Additionally, the contact's wife was the main driver of the vehicle. The vehicle was taken to the mechanic where it was diagnosed with a fractured mid-pipe assembly bracket. The contact was informed that the mid-pipe assembly bracket needed to be replaced. The vehicle was not repaired. The contact was advised to take the vehicle to the dealer. The dealer was made aware of the failure. The vehicle was scheduled to be taken to the dealer for diagnostic testing. The manufacturer was made aware of the failure and a case was filed. The contact was informed that the repair was not covered under an undisclosed Technical Service Bulletin. The contact was informed that the vehicle was not associated with the Technical Service Bulletin. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 88,835.

- Murrieta, CA, USA

The contact owns a 2018 Chevrolet Traverse. The contact stated that while driving at approximately 75 MPH, there was an abnormal thumping sound coming from the engine compartment. Additionally, the contact noticed a smoky smell in the cabin of the vehicle. The check engine warning light was illuminated. The vehicle was taken to an unknown dealer, where it was diagnosed that the exhaust system needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 139,136.

- Refugio, TX, USA

The contact owns a 2018 Chevrolet Traverse. The contact stated that upon starting the vehicle, there was an abnormal sound coming from the exhaust and smelled a gasoline odor. The check engine warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 50,000.

- New Lenox, IL, USA

The contact owns a 2018 Chevrolet Traverse. The contact stated that upon the start of the vehicle, an abnormal rattling sound was coming from the vehicle without warning. The contact stated that once the engine had warmed up, the rattling sound turned into a chugging sound. The vehicle was taken to an independent mechanic where it was discovered that the bracket used to hold the exhaust pipes together had rubbed against one of the pipes and formed a hole. The mechanic then explained that if not repaired, the catalytic converter would become damaged. The dealer was notified of the failure and an appointment was made to have a diagnostic test performed. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 117,600.

- Crest Hill, IL, USA

The contact owns a 2018 Chevrolet Traverse. The contact stated while parked in the driveway, there was an abnormally loud sound coming from underneath the hood. The vehicle was taken to the dealer, where it was diagnosed that the exhaust pipe was fractured and needed to be replaced. The vehicle was not repaired. The contact related the failure TSB Number: PIP5681. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered. The failure mileage was approximately 42,000.

- Gregory, MI, USA

The exhaust manifold is cracked and leaking and the weld on the front exhaust pipe is broken. When using auto start the cabin fills with exhaust fume smell

- Vienna, VA, USA