2020 Chevrolet Silverado 3500 Electrical system Problems
- Complaints
- 5about this part
- Share
- 12%of 42 total for the year
- Median mileage
- 39,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the electrical system of the 2020 Chevrolet Silverado 3500, 12% of the 42 complaints for this model year. Where a mileage was given, the median is 39,000 miles. 1 a fire, according to the filers.
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.
“I purchased a certified pre-owned 2020 Chevy Silverado 3500HD (6.6 Gas) November 2021. Within the next few weeks, I noticed brake squeaking that kept getting worse and the truck braking system would not stop like the 2500 I had traded in when I purchased the 3500HD. I had to adjust the trailer brake gain control up to as high as 9 or 9.5, should not have to adjust that high. I had trouble stopping at intersections and quick /emergency braking situations while pulling our trailer. This tells me the truck braking system is not working properly. …”
NHTSA complaint #11521535, filed 2023-05“The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while hauling a 2020 Heartland Cyclone, the trailer brakes unexpectedly deactivated. The contact stated that the trailer brake was disconnected, and the warning light to check the trailer winch was illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of failure. The vehicle was not repaired, and the failure persisted. The vehicle was returned to the dealer and the contact was informed that the trailer brake module had failed and needed to be replaced. …”
NHTSA complaint #11668128, filed 2025-06, 52,000 milesRelated service bulletins
- 11024486May 16, 2025This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
- 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.
- 11014579Feb 19, 2025This technical bulletin provides repair information to correct a customer concern of Diagnostic Tips For Park Assist Off Message / Unwanted Or False Park Assist Alerts / No DTCs.
- 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…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 4 | 33% |
| 2024 | 19 | 37% |
| 2023 | 1 | 6% |
| 2022 | 5 | 18% |
| 2021 | 13 | 32% |
| 2020 | 5 | 12% |
| 2019 | 5 | 23% |
| 2018 | 3 | 16% |
| 2017 | 1 | 8% |
| 2016 | 6 | 12% |
| 2015 | 16 | 31% |
| 2014 | 1 | 10% |
| 2013 | 4 | 15% |
| 2012 | 2 | 9% |
| 2011 | 2 | 7% |
| 2009 | 1 | 10% |
| 2008 | 6 | 19% |
| 2007 | 2 | 5% |
| 2006 | 3 | 6% |
| 2005 | 9 | 20% |
| 2004 | 4 | 10% |
| 2003 | 6 | 14% |
| 2002 | 1 | 2% |
| 2001 | 4 | 6% |
| 2000 | 5 | 6% |
| 1999 | 2 | 4% |
| 1998 | 3 | 4% |
| 1997 | 3 | 5% |
Other parts of the 2020 Chevrolet Silverado 3500
16 complaintsBrakes
7 complaintsEngine
6 complaintsFuel system
5 complaintsTires
5 complaintsEngine cooling
2 complaintsOther or unknown
2 complaintsForward collision avoidance
1 complaintsLatches, locks and linkages
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2020 Chevrolet Silverado 3500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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