Recall 18V765 affects 755 2019 Mack Granite (Gu) trucks for a snow plow lighting defect. Repair is free at any franchised Mack dealer.
Mack is recalling 755 2019 Granite (Gu) trucks equipped with snow plow lamp preparation kits because the snow plow headlights can be turned on without the other exterior lights. The defect can leave marker and tail lamps off while the snow plow headlights are on, reducing visibility and increasing crash risk; Mack dealers will complete the free repair.
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What's wrong?
The snow plow lamp preparation kit on the 2019 Mack Granite (Gu) is wiring and control hardware that lets plow headlights work with the truck's exterior lighting system. When the headlights are on, the truck also needs the required exterior lights and a working high beam indicator, so the driver and nearby traffic know which lights are active.
On affected trucks, the lamp setup was designed so the snow plow headlights can turn on by themselves. The other exterior lights do not turn on with them, and the high beam indicator does not work when the snow plow high beams are on. That is why the trucks do not meet FMVSS 108 for lamps and related equipment.
The warning sign is inside the cab. If the instrument cluster lights are not on while the snow plow headlights are on, that tells the driver the lighting setup is not working as intended.
Who's affected?
| 2019 Mack Granite (Gu) | Exterior lighting |
|---|---|
| Units affected | 755 |
| Field incidents | NHTSA has logged 1 field incident to date. |
Not every 2019 Mack Granite (Gu) truck is on the list. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Snow plow headlights can be on while the marker and tail lamps are off, making the vehicle harder for other drivers to see and increasing crash risk. If the instrument cluster lights are off, treat that as a warning and schedule the software update soon. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2019 Mack Granite (Gu) is included in this recall.
- Contact a franchised Mack dealer to schedule the free snow-plow-light software update that keeps marker and tail lamps working with the plow headlights.
- Bring the recall notice if Mack mailed one. If not, reference recall number 18V765 when you call.
- Confirm the marker and tail lamps are on whenever the snow plow headlights are used until the repair is complete.
What happens at the repair
At the dealer, a Mack technician updates the software that controls the snow plow light preparation system. The update is meant to keep the snow plow headlights and high beam indicator working with the required exterior lighting behavior. Parts and labor are free under the recall. If you already paid out of pocket for a plow light software repair or a related lighting repair before the recall work, Mack's general reimbursement plan covers documented expenses. Bring repair paperwork to the service desk, or contact Mack customer service at 1-800-866-1177.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 30, 2018 | NHTSA published the recall |
|---|---|
| November 6, 2018 | Dealer notification began |
| November 6, 2018 | Dealer notification ended |
| December 19, 2018 | Owner notification mailed |
| December 21, 2018 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| December 21, 2018 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 18V765?
Recall 18V765 covers 755 2019 Mack Granite (Gu) vehicles with snow plow lamp preparation kits. The plow headlights can turn on while marker and tail lamps stay off, reducing visibility and increasing crash risk. Mack dealers will update the plow-light software for free.
What should I do if my 2019 Mack Granite (Gu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 18V765. If it is, contact a franchised Mack dealer to schedule the plow-light software update. Reference Mack recall number SC0414 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects and compliance failures at no cost. Mack's remedy says dealers will update the software related to the plow lights free of charge at a franchised Mack dealer.
What is the safety risk?
The safety risk is reduced visibility when the snow plow headlights are on but the marker and tail lamps are off. Other drivers have less light to see the truck, increasing crash risk. The plow high beam indicator also fails to work when those high beams are on.
When did Mack start recall 18V765 repairs?
Mack began the recall repair on December 19, 2018. Owners with included VINs can contact a franchised Mack dealer for the plow-light software update. Mack customer service is 1-800-866-1177, and Mack's internal recall number is SC0414.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/18V765000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 18V765 |
| NHTSA recall # (full) | 18V765000 |
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 →