Recall 15V139 affects 262 2012-2015 Mack Pinnacle (Cxu) trucks for an air-release fifth wheel latch switch defect. Free repair at a franchised Mack dealer.
Mack is recalling 262 2012-2015 Pinnacle (Cxu) trucks because the air release fifth wheel latch switch can be pushed by mistake after the parking brake is released, letting the trailer disconnect from the tractor. That trailer separation increases crash risk, and the Mack dealer repair will be free once available.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The fifth wheel assembly on a 2012-2015 Mack Pinnacle (Cxu) is the coupling system that locks the trailer kingpin to the tractor. On these trucks, the fifth wheel latch is released by an air-operated switch, rather than only by a manual handle. That switch controls the mechanism that keeps the trailer attached after hookup.
The defect is the placement or behavior of the air release switch. After the parking brake has been released, the switch can be pushed by mistake and release the latch. If that happens while the tractor and trailer are in use, the trailer can unintentionally disconnect from the tractor.
There is no warning sign before failure. The driver does not get a separate alert that the switch has been pushed or that the latch is about to release, so the problem centers on preventing an accidental release in the first place.
Who's affected?
Spans the 2012-2015 model years, all tied to the fifth wheel assembly.
| 2012 Mack Pinnacle (Cxu) | Fifth wheel assembly |
|---|---|
| 2014 Mack Pinnacle (Cxu) | Fifth wheel assembly |
| 2013 Mack Pinnacle (Cxu) | Fifth wheel assembly |
| 2015 Mack Pinnacle (Cxu) | Fifth wheel assembly |
| Units affected | 262 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
An unintended fifth wheel release can let the trailer separate from the tractor and increase the risk of a crash. Until the recall work is completed, confirm the coupling before trips and schedule the repair as soon as the dealer can perform it. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2012-2015 Mack Pinnacle (Cxu) is included in this recall.
- Contact a franchised Mack dealer to schedule the free secondary fifth-wheel release action that prevents an accidental latch release.
- Ask the dealer to inspect the fifth-wheel release switch before the truck returns to service.
- Bring the recall notice if Mack mailed one. If not, reference recall number 15V139 and Mack recall SC0390 when you call.
- Drive with extra care until the repair is complete, and confirm the trailer is locked before moving the tractor.
What happens at the repair
At the dealer, a Mack technician installs a secondary action in the fifth wheel air release system. After the repair, the operator has to activate that extra step before the fifth wheel releases. That added step is meant to prevent the latch switch from being pressed by mistake after the parking brake is released. Mack's filing says the recall began on May 6, 2015, and the dealer repair will be free once available. The filing does not list a repair time.
Timeline
| March 11, 2015 | NHTSA published the recall |
|---|---|
| May 6, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V139?
Recall 15V139 covers 262 2012-2015 Mack Pinnacle (Cxu) trucks equipped with an air release fifth wheel latch. The release switch can be pushed by accident after the parking brake is released, allowing the trailer to disconnect from the tractor. Mack dealers add a secondary action for free.
What should I do if my 2012-2015 Mack Pinnacle (Cxu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 15V139. If it is, contact a franchised Mack dealer and reference recall number 15V139 or Mack recall SC0390. The dealer will install the added fifth wheel release action for free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to complete the recall repair at no cost. For recall 15V139, Mack dealers install a secondary action that the operator must activate before the fifth wheel releases, and parts and labor are covered.
What is the safety risk?
The safety risk is trailer separation after the parking brake has been released. If the fifth wheel latch release switch is pushed by accident, the trailer can unintentionally disconnect from the tractor. NHTSA lists the consequence as increased crash risk.
What if I bought this Mack Pinnacle (Cxu) used?
The free recall repair still applies. Recall coverage follows the truck, not the first owner. Check your VIN to confirm whether your 2012-2015 Mack Pinnacle (Cxu) is included, then call a franchised Mack dealer or Mack customer service at 1-800-528-6586.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V139000 |
|---|---|
| Mack customer service | 1-800-528-6586 |
| NHTSA recall # | 15V139 |
| NHTSA recall # (full) | 15V139000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 1, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →