Recall 18V778 affects 169 2019 Mack Anthem (An), Granite (Gr), and Pinnacle (Pi/Pn) trucks for loose pinch bolts. Free repair at any franchised Mack dealer.
Mack is recalling 169 2019 Anthem (An), Granite (Gr), and Pinnacle (Pi/Pn) trucks because a loose pinch bolt on the upper steering shaft can let the steering shaft separate. If that happens, the driver can lose steering control, which increases the risk of a crash, and Mack dealers will complete the repair free of charge.
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What's wrong?
The upper steering shaft in the 2019 Mack Anthem (An), Granite (Gr), and Pinnacle (Pi/Pn) connects the steering wheel to the steering gear below the cab. The pinch bolt is a small clamp bolt at that shaft connection; when it is tightened to specification, it locks the shaft in place so steering input reaches the front wheels.
On affected trucks, a manufacturing defect left the upper steering shaft pinch bolt not tightened to specification. If that bolt is loose, vibration and steering movement can let the shaft separate at the connection. Once the shaft separates, the steering wheel no longer controls the steering gear, causing a loss of steering.
There is no warning sign before failure. A driver should not rely on noise, looseness, or a dashboard light to catch this problem before the shaft separates; the repair is to inspect the pinch bolt and tighten it to specification.
Who's affected?
Covers three Mack truck lines from the 2019 model year, all tied to the steering system.
| 2019 Mack Anthem (An) | steering system |
|---|---|
| 2019 Mack Granite (Gr) | steering system |
| 2019 Mack Pinnacle (Pi/Pn) | steering system |
| Units affected | 169 |
| Field incidents | NHTSA has logged no field incidents to date. |
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?
Loss of steering leaves the driver without normal control and increases the risk of a crash. Until the inspection is complete, avoid unnecessary trips and schedule service soon. The dealer will inspect for loose pinch bolts and correct the vehicle as needed. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2019 Mack Anthem (An), Granite (Gr), or Pinnacle (Pi/Pn) is included in this recall.
- Contact a franchised Mack dealer to schedule the free inspection and pinch-bolt repair that secures the upper steering shaft.
- Bring the recall notice if Mack mailed one. If not, reference recall number 18V778 when you call.
- Ask Mack customer service at 1-800-866-1177 if you need help locating a dealer or confirming the repair path.
- Drive cautiously until the repair is complete, and stop driving if the steering feels loose or changes suddenly.
What happens at the repair
At the dealer, a Mack technician inspects the upper steering shaft pinch bolt area for loose pinch bolts and corrects the vehicle where needed. That repair can include tightening or securing the affected hardware so the steering shaft stays connected as designed. The recall inspection and repair are free. If you already paid for a related steering shaft or pinch bolt repair before the recall repair was available, Mack's general reimbursement plan covers documented repairs. Bring repair paperwork to the service desk or contact Mack customer service for the claim path.
| Reimbursement | Reimbursement available |
|---|
Timeline
| November 1, 2018 | NHTSA published the recall |
|---|---|
| November 5, 2018 | Dealer notification began |
| November 5, 2018 | Dealer notification ended |
| November 30, 2018 | Owner notification mailed |
| December 21, 2018 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 18V778?
Recall 18V778 covers 169 2019 Mack Anthem (An), Granite (Gr), and Pinnacle (Pi/Pn) vehicles with an upper steering shaft pinch bolt that was not tightened. If the shaft separates, the driver can lose steering, increasing crash risk. Mack dealers will inspect and correct the pinch bolt for free.
What should I do if my 2019 Mack Anthem (An), Granite (Gr), or Pinnacle (Pi/Pn) is on this recall?
Check your VIN to confirm your specific truck is included in recall 18V778. If it is, contact a franchised Mack dealer to schedule the steering shaft pinch bolt inspection and correction. Reference Mack recall number SC0413 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Mack dealers will inspect the affected steering shaft pinch bolt and correct the vehicle as needed, free of charge.
What is the safety risk?
The safety risk is loss of steering. A loose upper steering shaft pinch bolt can let the steering shaft separate, which can leave the driver without steering control and increase crash risk. Confirm your VIN, then arrange the free dealer inspection and correction.
What if I bought my Mack truck used?
The free recall repair still applies. Recall coverage follows the vehicle, not the first owner. Check your VIN to confirm whether your truck is included in recall 18V778, then call a franchised Mack dealer and reference recall number SC0413.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/18V778000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 18V778 |
| NHTSA recall # (full) | 18V778000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (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 May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →