Chevrolet Silverado 4500, Silverado 6500 +1 more: Service brakes — power assist

Affects Chevrolet Silverado 4500, Silverado 6500, Silverado 5500 · 2019–2020 — about 891 vehicles.

The hazard

Damaged brake jumper wires can result in power brake assist failure, increasing the risk of a crash.

What to do

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.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational