2020 Chevrolet Suburban Engine Problems
- Complaints
- 17about this part
- Share
- 39%of 44 total for the year
- Median mileage
- 92,500miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 17 complaints about the engine of the 2020 Chevrolet Suburban, 39% of the 44 complaints for this model year. Where a mileage was given, the median is 92,500 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Out of the blue, while driving, my car started lurching and making a weird rattling noise. I was able to make it to a mechanic, where I learned the cylinder lifters collapsed and crankshaft were broken. The mechanic told me this is a common defect for GM motors. My vehicle is only five years old, so to learn we have a $10-20,000 repair on our hands was paralyzing and devastating.”
NHTSA complaint #11657746, filed 2025-04“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 to additional years where these engines are experiencing the same failure as is covered by the current recall.”
NHTSA complaint #11754702, filed 2026-08“Fuel injector failed and pumped too much gas into cylinder causing gas to get into engine oil and ruin engine. GM claims they are building the replacement engine, but won't give any estimate of when it will be fixed. Other dealers that are receiving these engines will not sell the engine to my dealer. I believe there is a bigger problem that GM will not admit to and they should be held accountable. Four months is too long for this situation to exist!”
NHTSA complaint #11590849, filed 2024-05“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 getting fixed, again, but how can this be ok with GM to see their product be such a failure for consumers? Recall or not, this has left a horrible taste in our mouth for GM/Chevy vehicles. …”
NHTSA complaint #11698085, filed 2025-11“The vehicle has 70,000 miles. The engine has failed and been replaced two times. We are on the third engine. The first time was in 2021 the second time was in 2024. I heard that others are having a similar issue. This is a 2020 .6.2L RST. The engine failed the first time while driving at high speed the car just stopped working. The second time we heard it failing and were able to drive it to the dealer where the engine fell apart in the parking lot The vehicle has had other issues too. Currently the wire harness has failed. …”
NHTSA complaint #11668498, filed 2025-06Related service bulletins
- 11024330Sep 6, 2025This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder.
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11016942Mar 4, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11014233Jan 30, 2025This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 11013269Jan 16, 2025This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 24 | 53% |
| 2023 | 69 | 53% |
| 2022 | 62 | 50% |
| 2021 | 89 | 44% |
| 2020 | 17 | 39% |
| 2019 | 26 | 33% |
| 2018 | 19 | 23% |
| 2017 | 26 | 18% |
| 2016 | 27 | 12% |
| 2015 | 39 | 9% |
| 2014 | 1 | 2% |
| 2013 | 16 | 14% |
| 2012 | 12 | 12% |
| 2011 | 10 | 7% |
| 2010 | 6 | 5% |
| 2009 | 10 | 9% |
| 2008 | 25 | 12% |
| 2007 | 27 | 9% |
| 2005 | 6 | 5% |
| 2004 | 6 | 3% |
| 2003 | 4 | 1% |
| 2002 | 2 | 1% |
| 2001 | 7 | 2% |
| 2000 | 1 | 0% |
| 1999 | 2 | 0% |
| 1997 | 1 | 0% |
| 1994 | 1 | 0% |
Other parts of the 2020 Chevrolet Suburban
10 complaintsElectrical system
8 complaintsOther or unknown
4 complaintsSteering
4 complaintsBrakes
3 complaintsFuel system
3 complaintsVehicle speed control
3 complaintsAir bags
2 complaintsElectronic stability control
2 complaintsSuspension
2 complaintsEngine cooling
1 complaintsForward collision avoidance
1 complaints
← All problems reported for the 2020 Chevrolet Suburban
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology