Defect Description
Mack Trucks, Inc. (Mack) is recalling certain 2025-2026 Pioneer vehicles. When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control module.
Safety Consequence
Trailer tail lights and turn signals that do not illuminate as intended can reduce visibility to other drivers, increasing the risk of a crash.
Remedy
Dealers will replace the trailer body input/output module, free of charge. Owner letters were mailed November 19, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0484.Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning September 25, 2025.
Affected Vehicles
| Year | Make | Model |
|---|---|---|
| 2025 | MACK | PIONEER PR (4) |
| 2026 | MACK | PIONEER PR (4) |
Check your vehicle: Visit NHTSA.gov and enter your VIN to see if your specific vehicle is affected.