2018 Chevrolet Tahoe electrical system problems
13 owner complaints filed with NHTSA name the electrical system on the 2018 Chevrolet Tahoe — 13% of all complaints for this model year.
What owners report
“Vehicle was driven the day before the incident occurred. The morning of the incident, the vehicle was parked, off and not running. A notification sent to my phone indicating a critical battery low 11.1V reading. Vehicle would not start. Vehicles battery and alternator charging system was tested and…”
filed Aug 18, 2026
“The Body Control Module does not work. A new BCM was installed in my car in April 2025. Since then I am having multiple issues, but the safety related issue is with the trailer braking system. It is available for inspection upon request. The dealership is unwilling to try another BCM without it…”
filed Jul 14, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Tahoe years
| Year | Reports | Share |
|---|---|---|
| 2025 Tahoe | 8 | 17% |
| 2024 Tahoe | 13 | 20% |
| 2023 Tahoe | 37 | 17% |
| 2022 Tahoe | 37 | 20% |
| 2021 Tahoe | 56 | 12% |
| 2020 Tahoe | 11 | 20% |
| 2019 Tahoe | 16 | 15% |
| 2017 Tahoe | 20 | 12% |
| 2016 Tahoe | 31 | 12% |
| 2015 Tahoe | 135 | 21% |
| 2014 Tahoe | 15 | 17% |
| 2013 Tahoe | 16 | 7% |
Other reported problem areas on the 2018 Chevrolet Tahoe
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.