United StatesCertain 2025–2026 Pioneer vehicles are affected; the load lock clamps on the back of the cab may loosen and allow the load lock bars to become unsecured. A loose or unsecured load lock bar can result in a loss of cargo, creating a road hazard and increasing the risk of a crash. Dealers will replace the load lock clamps free of charge; owner notification letters were mailed December 18, 2026, owners may contact Mack customer service at 1‑800‑866‑1177, and VINs will be searchable on NHTSA.gov beginning November 27, 2025.
What's being recalled
Mack Trucks, Inc. (Mack) is recalling certain 2025-2026 Pioneer vehicles. The load lock clamps, located on the back of the cab, may loosen and cause the load lock bars to become unsecured.
How to identify it
NHTSA campaign 25V801000; Manufacturer campaign SC0489
The hazard
A loose or unsecured load lock bar can result in a loss of cargo, creating a road hazard and increasing the risk of a crash.
What to do
Dealers will replace the load lock clamps, free of charge. Owner notification letters were mailed December 18, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0489. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning November 27, 2025.
The official notice
This page is a summary of the notice published by U.S. National Highway Traffic Safety Administration, collected from U.S. National Highway Traffic Safety Administration. Check the original before you act on it.
Read the official notice (opens in a new tab)
