2021 Chevrolet Suburban engine problems
84 owner complaints filed with NHTSA name the engine on the 2021 Chevrolet Suburban — 43% of all complaints for this model year.
What owners report
“Sudden Loss of Power & Shaking: The misfire itself causes a drastic drop in acceleration. If you are merging onto a highway or trying to pass another vehicle, the sudden loss of power can leave you stranded in the path of oncoming traffic. No Stability Assistance: Because StabiliTrak and Traction…”
filed Sep 15, 2026
“I am filing this complaint regarding a serious engine and safety issue with my 2021 Chevrolet Suburban equipped with the GM 6.2L engine, with approximately 45,000 miles. The vehicle has developed a noticeable and abnormal shaking/vibration coming from the engine. At the same time, the vehicle…”
filed Sep 14, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Connecting rod and/or crankshaft engine components may have manufacturing defects that…Campaign 25V274000 · Apr 24, 2025
Related service bulletins
Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator Light (Check Engine Light) will illuminate and a diagnostic trouble code will…
N262552620 · Service Campaign · issued May 11, 2026
Engine problems in other Suburban years
| Year | Reports | Share |
|---|---|---|
| 2024 Suburban | 22 | 52% |
| 2023 Suburban | 66 | 53% |
| 2022 Suburban | 60 | 50% |
| 2020 Suburban | 17 | 39% |
| 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 2021 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.