2020 Chevrolet Suburban power train problems
10 owner complaints filed with NHTSA name the power train on the 2020 Chevrolet Suburban — 24% of all complaints for this model year.
What owners report
“Transmission is not functioning properly at 74,300 miles. Engine kept slipping while driving uphill and the RPMs were not matching vehicle speed. Could not go above 50mph while merging onto freeway which was very dangerous. Whirring noise occurred every time I accelerated which was also noted By…”
filed Dec 10, 2025
“Our engine went at 100,800 miles, costing us $15k in June 2025. Then our transmission went 3 months later, now costing us another $7k. GM is offering very little financial assistance. It's quite inconvenient that these major mechanical issues occur right after factory warranty. It is at a dealer…”
filed Nov 7, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- A component missing from the drivetrain transfer case may cause the front and/or rear…Campaign 26V289000 · May 7, 2026
Power Train problems in other Suburban years
| Year | Reports | Share |
|---|---|---|
| 2024 Suburban | 7 | 19% |
| 2023 Suburban | 12 | 11% |
| 2022 Suburban | 29 | 27% |
| 2021 Suburban | 35 | 19% |
| 2019 Suburban | 38 | 50% |
| 2018 Suburban | 17 | 21% |
| 2017 Suburban | 38 | 27% |
| 2016 Suburban | 44 | 20% |
| 2015 Suburban | 47 | 11% |
| 2014 Suburban | 5 | 8% |
| 2013 Suburban | 6 | 5% |
| 2012 Suburban | 5 | 5% |
Other reported problem areas on the 2020 Chevrolet Suburban
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.