The Recall Desk
HighNHTSA·25V801000·Announced 2025-11-20

Mack Recalls 2025-2026 Pioneer Trucks for Loose Load Lock Clamps

Mack is recalling 2025-2026 Pioneer vehicles because load lock clamps may loosen, causing cargo loss and increasing crash risk.

What this means for you

Real risk of harm even if no illness or injury has been reported yet. Stop using the product and follow the agency's guidance.

Our severity reasoning: The recall involves a structural defect that creates a road hazard and increases the risk of a crash, fitting the 'High' severity criteria for risk-of-harm products where injury has not yet been reported.

Plain-English summary

Mack Trucks, Inc. is recalling certain 2025-2026 Pioneer vehicles. The load lock clamps located on the back of the cab may loosen, which can cause 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'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 recalled product

Product
MACK PIONEER PR (4)
Brand
MACK
Manufacturer
Mack Trucks, Inc.
Category
Vehicle — Truck
Hazard
Affected units
46

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Model numbers (1)

  • PIONEER PR (4)

Distribution

Distributed nationwide across the United States.

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