2021 Chevrolet Traverse: check engine light

Filed Aug 21, 2026 · Transmission · WV

Transmission shutters at lower gear going from 20-30 mph approximately and at the speed of 60-70 mph. When this happens it causes a delay in acceleration and for the whole car to shake. This was also noted by my mechanic even after changing transmission fluid and had concerns for the safety if it was to completely disrupt the transmission causing an accident. I was advised to check for recall since a lot of these makes and models have been having this issue. The SUV only has about 64,000 miles on it and has had all of its routine maintenance done regularly. I have only had it in my possession for 6 moths. No engine lights on. I do a lot of highway driving and I am concerned that this issue will possibly cause an accident. Ameritech Tire and Auto at 304‑229‑8924, Inwood, WV. August 12, 2026 was date of service.

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 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 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 Mar 10, 2025 · Fuel system · GA

1. DRIVER SIDE EXHAUST FLEX PIPE BRAKET 2. Exhaust leak 3. Yes. It has been replicated and diagnosed. 4. No engine light. There was a rattling and increased exhaust noise. A hole in the exhaust pipe at the bracket location was found. 5. This condition seems to be a common problem with this year and make which I am now having to pay $600 to repair.

Filed May 30, 2024 · Engine · 61,000 miles · GA

The contact owns a 2021 Chevrolet Traverse. The contact stated that while driving at an undisclosed speed, she heard an abnormal rattling sound emanating from underneath the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the catalytic converter. Additionally, the contact was informed that the exhaust system needed to be replaced. The contact stated that the exhaust had previously failed and was replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to Special Coverage: N222385510. The manufacturer was not notified of the failure. The failure mileage was 61,000.