2020 Chevrolet Suburban engine problems
17 owner complaints filed with NHTSA name the engine on the 2020 Chevrolet Suburban — 39% of all complaints for this model year.
What owners report
“In 2025, one if the pistons misfired. It was repaired and the same issue occurred a year later causing the cam shaft to break as well. Not to mention we had an electrical failure where the dashboard didn’t work and the water pump failed right after it was in for the first piston misfiring. It was…”
filed Aug 27, 2026
“Engine had a catastrophic failure and completely shut off while driving down the highway. The engine has completely seized and requires replacement. The vehicle was towed to an independent service shop and the technician diagnosed that the engine needed to be replaced.”
filed Aug 25, 2026
“There is a safety recall on GM’s 6.2L V8 L87 engine model years 2021-2024. My vehicle is a 2020 Suburban with a 6.2L V8 L87 engine. My engine recently experienced the same failure as cited in the recall, but because it is outside the 2021-2024 window it is not covered by this recall. I ask that the recall be expanded…”
filed Aug 4, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Suburban years
| Year | Reports | Share |
|---|---|---|
| 2024 Suburban | 22 | 52% |
| 2023 Suburban | 66 | 53% |
| 2022 Suburban | 60 | 50% |
| 2021 Suburban | 84 | 43% |
| 2019 Suburban | 25 | 32% |
| 2018 Suburban | 18 | 22% |
| 2017 Suburban | 25 | 18% |
| 2016 Suburban | 27 | 12% |
| 2015 Suburban | 39 | 9% |
| 2014 Suburban | 1 | 2% |
| 2013 Suburban | 16 | 14% |
| 2012 Suburban | 12 | 12% |
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.