2020 Chevrolet Suburban Electrical system Problems
- Complaints
- 8about this part
- Share
- 18%of 44 total for the year
- Median mileage
- 87,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the electrical system of the 2020 Chevrolet Suburban, 18% of the 44 complaints for this model year. Where a mileage was given, the median is 87,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Odometer Fraud. The contact purchased a 2020 Chevrolet Suburban. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 88,000 and at the time of registration, it was discovered that the mileage was 252,000.”
NHTSA complaint #11681266, filed 2025-08, 252,000 miles“2020 Chevrolet Suburban. Upon vehicle start: steering assist, trailer brake system, stability track all inop. Tachometer and speedometer inop. No reverse gear. When in drive, only first gear obtainable and manual shift mode inop. Seat heat inop. Turned off and restarted approx five times and issues remained. Upon sixth restart issues no longer present. Drove 15 miles home. Vehicle sat 2 hours, then restarted and operated normally for 1/2 hour operation, then turned off. Vehicle operated normally twice within two hour period. Parked overnight, and in a.m. …”
NHTSA complaint #11307573, filed 2020-02, 775 miles“My car shut off two times while driving. When you google the issue, it auto populates meaning that this is a very common issue with GM. It starts back to 2015 searches as well. GM needs to recall their suburbans for their cars turning off while driving which caused me to lose power steering, power brakes and anything that requires electrical.”
NHTSA complaint #11522047, filed 2023-05“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 2025-06“The contact owns a 2020 Chevrolet Suburban. The contact stated that the vehicle experienced electrical failures that caused several safety and powered components to turn off and on. The contact stated that the vehicle occasionally lost power steering or windshield wiper functionality and would start functioning without having been engaged manually. The contact stated that the instrument cluster occasionally went black. …”
NHTSA complaint #11709472, filed 2026-01, 85,000 milesRelated service bulletins
- 11019017Apr 10, 2025This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
- 11017595Apr 3, 2025This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
- 11017244Mar 31, 2025The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other…
- 11017255Mar 25, 2025This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering…
- 11017207Mar 21, 2025This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414…
- 11017031Mar 12, 2025This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
- 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.
- 11014239Jan 29, 2025This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during…
- 11014222Jan 28, 2025This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
- 11013269Jan 16, 2025This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 5 | 11% |
| 2023 | 14 | 11% |
| 2022 | 22 | 18% |
| 2021 | 20 | 10% |
| 2020 | 8 | 18% |
| 2019 | 7 | 9% |
| 2018 | 17 | 20% |
| 2017 | 21 | 15% |
| 2016 | 26 | 12% |
| 2015 | 58 | 13% |
| 2014 | 7 | 12% |
| 2013 | 14 | 12% |
| 2012 | 10 | 10% |
| 2011 | 10 | 7% |
| 2010 | 9 | 8% |
| 2009 | 16 | 15% |
| 2008 | 22 | 10% |
| 2007 | 25 | 9% |
| 2006 | 3 | 13% |
| 2005 | 36 | 28% |
| 2004 | 72 | 35% |
| 2003 | 81 | 27% |
| 2002 | 10 | 4% |
| 2001 | 30 | 7% |
| 2000 | 13 | 5% |
| 1999 | 58 | 9% |
| 1998 | 14 | 7% |
| 1997 | 42 | 10% |
| 1996 | 47 | 13% |
| 1995 | 32 | 7% |
| 1994 | 21 | 2% |
| 1993 | 7 | 1% |
| 1992 | 9 | 5% |
| 1991 | 2 | 4% |
| 1990 | 3 | 6% |
| 1989 | 1 | 2% |
| 1987 | 2 | 11% |
| 1986 | 1 | 14% |
Other parts of the 2020 Chevrolet Suburban
17 complaintsTransmission and drivetrain
10 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 30, 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