2021 Chevrolet Traverse engine problems
11 owner complaints filed with NHTSA name the engine on the 2021 Chevrolet Traverse — 12% of all complaints for this model year.
What owners report
“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…”
filed Aug 18, 2026
“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…”
filed May 13, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Traverse years
| Year | Reports | Share |
|---|---|---|
| 2026 Traverse | 4 | 17% |
| 2025 Traverse | 12 | 7% |
| 2024 Traverse | 31 | 23% |
| 2023 Traverse | 17 | 19% |
| 2022 Traverse | 17 | 17% |
| 2020 Traverse | 70 | 31% |
| 2019 Traverse | 62 | 15% |
| 2018 Traverse | 84 | 18% |
| 2017 Traverse | 25 | 7% |
| 2016 Traverse | 31 | 11% |
| 2015 Traverse | 37 | 12% |
| 2014 Traverse | 117 | 21% |
Other reported problem areas on the 2021 Chevrolet Traverse
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.