2021 Chevrolet Silverado 3500 electrical system problems
12 owner complaints filed with NHTSA name the electrical system on the 2021 Chevrolet Silverado 3500 — 30% of all complaints for this model year.
What owners report
“On XXX the 2021 Chevrolet Silverado was taken to Mayse Automotive Group at [XXX] dealership for the complaint of the key getting stuck in the ignition and unable to remove causing a safety and security risk. Service department found that the transmission control in column needed to be replaced. The…”
filed Aug 19, 2026
“Water entered tailgate through drainage hole in tailgate cap. The water then dripped on the tailgate switch causing it to short out. This short circuit caused my tailgate to open and close randomly without pressing any switches or buttons or key fobs. May tailgate has a small ding it it now from…”
filed Apr 29, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Silverado 3500 years
| Year | Reports | Share |
|---|---|---|
| 2024 Silverado 3500 | 19 | 39% |
| 2022 Silverado 3500 | 5 | 19% |
| 2020 Silverado 3500 | 5 | 12% |
| 2019 Silverado 3500 | 5 | 23% |
| 2018 Silverado 3500 | 3 | 16% |
| 2016 Silverado 3500 | 6 | 12% |
| 2015 Silverado 3500 | 16 | 31% |
| 2013 Silverado 3500 | 4 | 15% |
| 2012 Silverado 3500 | 2 | 9% |
| 2011 Silverado 3500 | 2 | 7% |
| 2008 Silverado 3500 | 6 | 19% |
| 2007 Silverado 3500 | 2 | 5% |
Other reported problem areas on the 2021 Chevrolet Silverado 3500
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.