Mack Pioneer Recall: Loose Load Lock Bars Crash Risk
Mack recalls 2025-2026 Pioneer trucks due to loose load lock clamps that may cause cargo loss and crash risk. Free dealer repair available.
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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 happened, in plain English
Mack Trucks is recalling certain 2025 and 2026 Pioneer vehicles because the load lock clamps on the back of the cab may loosen. This can leave the load lock bars unsecured, potentially causing cargo to fall off and creating a road hazard or increasing the risk of a crash. Dealers will replace the faulty clamps free of charge. Read more at govinfonow.com/recall/1364725-mack-pioneer-recall-loose-load-lock-bars-crash-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/1364725-mack-pioneer-recall-loose-load-lock-bars-crash-risk · Updated October 9, 2026 · Official notice: NHTSA #25V801000
Cite this page
“Mack Pioneer Recall: Loose Load Lock Bars Crash Risk.” GovInfoNow, updated October 9, 2026. https://govinfonow.com/recall/1364725-mack-pioneer-recall-loose-load-lock-bars-crash-risk. Based on NHTSA recall #25V801000 (https://www.nhtsa.gov/recalls?nhtsaId=25V801000).
Why it’s dangerous
The load lock clamps located on the back of the cab can loosen, causing the load lock bars to become unsecured. If this happens, a loose or unsecured load can result in a loss of cargo, which creates a hazard for other drivers and increases the risk of a crash.
Who’s affected
Owners of specific 2025-2026 Mack Pioneer trucks are affected. Drivers and other road users are at risk if cargo falls from the vehicle due to unsecured load lock bars.
How to tell if you have this one
Check if you own a 2025-2026 Mack Pioneer truck. You can verify if your specific vehicle is involved by searching its Vehicle Identification Number (VIN) on NHTSA.gov beginning November 27, 2025. Owner notification letters were mailed on December 18, 2026.
- Brand
Mack- Category
Vehicle
What to do — step by step
Check Your VIN
Search your Vehicle Identification Number on NHTSA.gov starting November 27, 2025, to confirm if your truck is included in recall SC0489.
Contact Mack Service
Call Mack's customer service at 1-800-866-1177 for more information about the recall.
Schedule Dealer Repair
Take your vehicle to a dealer who will replace the load lock clamps free of charge.
What NHTSA says 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.
How this recall unfolded
Recall timeline
2 dated steps over 11 months.
- NHTSA received the defect report
- Added to GovInfoNow
Dates from the agency record only; steps without a date are left out.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #25V801000 (November 20, 2025)
- Plain-language summary written by qwen3.6:35b-a3b on October 9, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.