The defect
General Motors, LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado Medium Duty 4500HD, 5500HD, and 6500HD vehicles. These vehicles were remedied under NHTSA Recall 25V390 with a brake jumper wire harness that was assembled without protective tape. A wiring harness that is missing protective tape can allow the wires to become damaged.
The risk
Damaged brake jumper wires can result in power brake assist failure, increasing the risk of a crash.
The remedy
Dealers will remove the installed wire harness, apply protective tape, and reinstall the wire harness, free of charge. Owner notification letters are planned to be mailed December 22, 2025. Owners may contact GM customer assistance number at 1-866-467-9700. GM's number for this recall is N252531990. Vehicles in this recall were previously repaired under 25V390 and will need to have the new remedy completed. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov beginning November 6, 2025.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Chevrolet Silverado 4500 | 2019, 2020 |
| Chevrolet Silverado 5500 | 2019, 2020 |
| Chevrolet Silverado 6500 | 2019, 2020 |
Components: SERVICE BRAKES, HYDRAULIC:POWER ASSIST
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Chevrolet Silverado 4500 | 2019 | 0 | 3 |
| Chevrolet Silverado 4500 | 2020 | 1 | 2 |
| Chevrolet Silverado 5500 | 2019 | 3 | 3 |
| Chevrolet Silverado 5500 | 2020 | 0 | 2 |
| Chevrolet Silverado 6500 | 2019 | 0 | 4 |
| Chevrolet Silverado 6500 | 2020 | 0 | 1 |
Other service brakes, hydraulic recalls in 2025
37 of the 891 recall campaigns reported to NHTSA in 2025 concerned the service brakes, hydraulic; General Motors, LLC filed 186 campaigns in all.
| 25V873000 17 Dec 2025 | Suzuki Motor USA, LLC |
| 25V859000 11 Dec 2025 | Honda (American Honda Motor Co.) |
| 25V846000 9 Dec 2025 | Chrysler (FCA US, LLC) |
| 25V823000 1 Dec 2025 | Ford Motor Company |
| 25V693000 10 Oct 2025 | Ford Motor Company |
| 25V564000 29 Aug 2025 | Tuff Trailer USA Inc. |
| 25V550000 26 Aug 2025 | Forest River, Inc. |
| 25V544000 22 Aug 2025 | Ford Motor Company |
NHTSA recalls (public domain) · all recalls of 2025