General Motors, LLC: Service Brakes, Hydraulic › Power Assist
General Motors, LLC reported this defect to federal regulators on Nov 6, 2025 and put the number of vehicles at risk at 891. The repair is free for as long as the recall stands.
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.
6 model years covered
Newest first| Vehicle | Complaints | Recalls | Fires | Crashes |
|---|---|---|---|---|
| 2020 Chevrolet Silverado 4500 | 1 | 2 | 0 | 0 |
| 2020 Chevrolet Silverado 5500 | 0 | 2 | 0 | 0 |
| 2020 Chevrolet Silverado 6500 | 0 | 1 | 0 | 0 |
| 2019 Chevrolet Silverado 4500 | 0 | 3 | 0 | 0 |
| 2019 Chevrolet Silverado 5500 | 3 | 3 | 0 | 0 |
| 2019 Chevrolet Silverado 6500 | 0 | 4 | 0 | 0 |
What this page is, and what to do next
A recall is not an opinion. It is a Part 573 report a manufacturer is required by federal law to file once it decides a defect poses an unreasonable risk to safety, and it commits them to repairing the vehicle at no cost to the owner. The three passages above are the manufacturer’s own wording as published by NHTSA.
This page describes the campaign. It cannot tell you whether one particular car has already been through the shop — that is tracked by VIN, and only the manufacturer knows it. Check yours at nhtsa.gov/recalls or with a franchised dealer, quoting campaign number 25V768000.
Full record for the 2020 Chevrolet Silverado 4500 → · Recalls carrying a do-not-drive advisory → · Where this data comes from →