Recall 14V738 affects 40 2015 Mack Pinnacle (Cxu) and Granite (Gu) trucks for incorrect automatic shutdown wiring. Repair is free at any franchised Mack dealer.
Mack is recalling 40 2015 Pinnacle (Cxu) and Granite (Gu) trucks because the Automatic Shut-down Protection System was wired incorrectly and can fail to work as expected. If it fails, the operator can lose control of rising engine rpm, increasing the risk of engine failure and vehicle fire; Mack dealers will complete the repair free of charge.
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 Automatic Shut-down Protection System on 2015 Mack Pinnacle (Cxu) and Granite (Gu) trucks is part of the engine protection setup. Its job is to watch engine conditions and trigger a shutdown when the system sees a condition that needs the engine protected from damage. The wiring has to match the designed circuit so the protection system receives the right signal and responds at the right time.
On affected trucks, the system was wired incorrectly during manufacturing. Because the circuit is wrong, the shutdown protection does not operate as designed when the engine protection logic needs it. Mack identified the corrected condition as proper wiring, which means the repair path centers on correcting the circuit so the protection system can work as intended.
There is no warning sign before failure. The recall record does not identify a light, sound, message, or drivability symptom that tells the driver the shutdown protection wiring is wrong.
Who's affected?
Covers two Mack truck lines from the 2015 model year, both tied to the engine component.
| 2015 Mack Pinnacle (Cxu) | Engine |
|---|---|
| 2015 Mack Granite (Gu) | Engine |
| Units affected | 40 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
If the Automatic Shut-down Protection System does not operate as expected, rising engine rpm can get beyond the operator's control, increasing the risk of engine failure and vehicle fire. If engine speed rises unexpectedly, stop as safely as traffic allows and call a Mack dealer. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2015 Mack Pinnacle (Cxu) or Granite (Gu) is included in this recall.
- Contact a franchised Mack dealer to schedule the free Automatic Shut-down Protection System inspection and repair for the incorrect wiring tied to uncontrolled engine rpm.
- Bring the recall notice if Mack mailed one. If not, reference recall number 14V738 and Mack recall SC0386 when you call.
- Call Mack customer service at 1-610-709-2131 if the dealer cannot confirm the repair path.
- Watch for unexpected engine rpm increase, stop in a safe place, and call the dealer before driving farther.
What happens at the repair
At the dealer, a Mack technician inspects the Automatic Shut-down Protection System to confirm it operates correctly. If the inspection finds a problem, the technician corrects the wiring or related system fault covered by the recall. Parts and labor are free under the recall. Mack's reimbursement plan reviews owner-paid repairs from before the recall notice case by case. Bring invoices and proof of payment to the service desk, or contact Mack customer service so the claim can be reviewed under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| November 20, 2014 | NHTSA published the recall |
|---|---|
| November 24, 2014 | Dealer notification began |
| November 24, 2014 | Dealer notification ended |
| November 24, 2014 | Interim owner notification (was planned for this date) |
| January 16, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 14V738?
Recall 14V738 covers 40 2015 Mack Pinnacle (Cxu) and Granite (Gu) trucks with an incorrectly wired Automatic Shut-down Protection System. Mack dealers will inspect the system for correct operation and repair it if needed for free.
What should I do if my 2015 Mack Pinnacle (Cxu) or Granite (Gu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 14V738. If it is, contact a franchised Mack dealer to schedule the Automatic Shut-down Protection System inspection and any needed repair. Reference Mack recall number SC0386 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Mack's remedy says dealers will inspect the Automatic Shut-down Protection System and repair it if necessary free of charge.
What is the safety risk?
The risk is loss of control over rising engine rpm. If the Automatic Shut-down Protection System does not operate as expected, engine speed can increase beyond the operator's control, increasing the risk of engine failure and vehicle fire.
What if I bought this Mack truck used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your specific 2015 Mack Pinnacle (Cxu) or Granite (Gu) is included, then call a Mack dealer with recall number 14V738 or SC0386.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/14V738000 |
|---|---|
| Mack customer service | 1-610-709-2131 |
| NHTSA recall # | 14V738 |
| NHTSA recall # (full) | 14V738000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (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 →