2021 Chevrolet Traverse engine problems

Filed Aug 18, 2026 · Engine · GA

The welding that holds the exhaust together has failed. They offer a Special Warranty to cover only the passenger side, however it has failed and exhaust is super loud. Also reading 4 codes from check engine alert. All are P0420 (cat convertor). The smell of exhaust and cat convertor is super disgusting

Filed Jul 8, 2026 · Engine · 72,400 miles · TX

The contact owned a 2021 Chevrolet Traverse. The contact stated that the vehicle was taken to an independent mechanic for an inspection, where a leaking oil pan gasket was diagnosed. The contact stated that the failure had also occurred on a 2019 Chevrolet Traverse he owned. Although the vehicle had been taken to the dealer two months prior, the dealer did not find the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 72,400.

Filed May 13, 2026 · Engine · KS

Check engine light came on and I noticed that the cooling fan would continue running for several minutes even after turning vehicle off. Had a mechanic run the diagnostics and the code came back as a thermostat/cooling issue. Although when I called to make an appointment and told him the issue and that it was a 2021 Traverse, he knew exactly what the issue was. He said that is a very common issue in all 2021 Chevy/GM engines. Online research provided a couple special coverages for repairs on 7 different GM vehicles from that same time period. Of course, the Traverse is one that is not included. Seems fairly obvious this was a GM engine issue from all vehicles in the 2021-2023 timeframe. Not sure how they can only pick out 7 models, but I am hoping an update can be made to add the Traverse and any other GM models that have that same 2021 engine.

Filed Mar 3, 2026 · Engine · TX

Both exhaust pipes before the catalytic converter are cracked and leaking at the same welded mounting bracket. One of them GM is coving under the extended warranty but the other one also needs replaced the turn off the engine warning light. It is allowing exhaust gas to leak under the car and is preventing the emissions from operating properly.

Filed Feb 24, 2026 · Engine, Transmission · 137,000 miles · NC

The contact owns a 2021 Chevrolet Traverse. The contact stated that while driving at various speeds, the vehicle failed to respond intermittently upon depression of the accelerator pedal. Additionally, the contact stated that the gear shifter failed to respond or responded slowly when releasing the gear shifter button intermittently. The gear shifter was easily moved to a different gear from unintended contact. While accelerating from a complete stop, the vehicle hesitated to respond, jerked, and made an abnormal sound while the RPMs were significantly elevated. The vehicle failed to respond upon shifting to reverse(R), and the gear shifter was sticky. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where the contact was informed that there were fault codes found that were related to the transmission. An appointment was scheduled with the dealer for a diagnostic test. The vehicle was not yet diagnosed or repaired. The contact related the failure to an unknown recall. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 137,000.

Filed Dec 1, 2025 · Engine · 74,000 miles · OH

The contact owns a 2021 Chevrolet Traverse. The contact stated that while starting the vehicle, the front exhaust pipe made an abnormally loud sound, and there was an odor inside the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 74,000.

Filed Oct 10, 2025 · Engine · 41,000 miles · KY

The contact owns a 2021 Chevrolet Traverse. The contact stated that while driving at an undisclosed speed, the check engine and oil warning lights illuminated. After a visual inspection of the engine compartment, the contact observed that the engine oil was abnormally low and required 2-quarts of oil to top off the oil level even though the vehicle had recently been serviced. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 41,000.

Filed Sep 21, 2025 · Engine · AL

I was driving to work and my car made a loud noise. I was able to drive back home. I took my car to the Chevrolet repair shop. They said my front exhaust and catalytic converter are broken. They replaced my exhaust pipe and not the converter.

Filed Jul 23, 2025 · Engine · LA

the dealership car because the engine lingt Come the fun out the Cadillac converter have to be replaced. Is a 2021 traverse. Come to find out I'm not the only person that has the same problem I need to check the Cadillac converters on these Traverse

Filed Oct 8, 2024 · Acceleration, Driver assistance · GA

2021 Chevy Traverse went out in September, it would shutter causing take off to jerk so hard and cause traffic to stall, hurting passengers necks, and almost causing accidents