Recall 23V600 affects 27,418 2015-2023 Mack Granite (Gu) and Granite (Gr) trucks for low turn signal visibility. Repair is free at any franchised Mack dealer.
Mack is recalling 27,418 2015-2023 Granite (Gu) and Granite (Gr) trucks because the turn signals are positioned incorrectly and are harder for other drivers to see. Lower signal visibility gives nearby traffic less notice of a turn and increases crash risk; Mack dealers will correct the lights free of charge.
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What's wrong?
The front turn signal is part of the headlamp assembly on 2015-2023 Mack Granite (Gu) and Granite (Gr) trucks. Its normal job is to show other drivers which way the truck is turning or changing lanes. On a large truck, that signal has to remain visible from specific side and downward angles, as well as from straight ahead.
On affected trucks, some chassis extensions and hood variations did not incorporate the updated lighting visibility requirement. That leaves the turn signals positioned where their view is reduced from certain angles. The lamp still works, but its placement means another road user has less signal visibility than the standard requires.
There is no warning sign before failure. The driver is not expected to see a warning light or notice a change in how the turn signal flashes. The issue is the signal's viewing angle on the truck, not an electrical failure inside the headlamp.
Who's affected?
Spans the Granite (Gu) and Granite (Gr) across 9 model years, tied to the same headlamp turn signal.
| 2022 Mack Granite (Gu) | Turn signal |
|---|---|
| 2016 Mack Granite (Gr) | Turn signal |
| 2017 Mack Granite (Gr) | Turn signal |
| 2019 Mack Granite (Gr) | Turn signal |
| 2020 Mack Granite (Gr) | Turn signal |
| 2015 Mack Granite (Gu) | Turn signal |
| 2018 Mack Granite (Gu) | Turn signal |
| 2022 Mack Granite (Gr) | Turn signal |
| 2016 Mack Granite (Gu) | Turn signal |
| 2017 Mack Granite (Gu) | Turn signal |
| 2019 Mack Granite (Gu) | Turn signal |
| 2020 Mack Granite (Gu) | Turn signal |
| 2021 Mack Granite (Gu) | Turn signal |
| 2023 Mack Granite (Gr) | Turn signal |
| 2021 Mack Granite (Gr) | Turn signal |
| 2018 Mack Granite (Gr) | Turn signal |
| 2015 Mack Granite (Gr) | Turn signal |
| 2023 Mack Granite (Gu) | Turn signal |
| Units affected | 27,418 |
| 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?
Low turn signal visibility makes turns harder for other drivers to see, increasing crash risk. There is no warning sign tied to this lighting issue. Use extra care when signaling and schedule the repair soon. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2015-2023 Mack Granite (Gu) or Granite (Gr) is included in this recall.
- Contact a franchised Mack dealer to schedule the free added turn-signal lighting that makes the signals easier for other drivers to see.
- Bring the recall notice if you have it. If not, reference recall number 23V600 and Mack recall SC0448 when you call.
- Use extra care before turns until the repair is complete, since low turn signal visibility gives other drivers less notice.
What happens at the repair
At the dealer, a Mack technician adds additional turn signal lighting so the signals are positioned for better visibility. The recall repair is free, with parts and labor covered. Mack uses its standard reimbursement plan for owners who already paid for the same turn signal repair before the recall notice. Keep related invoices and ask Mack customer service or the dealer service desk how to submit documentation under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| August 25, 2023 | NHTSA published the recall |
|---|---|
| September 1, 2023 | Dealer notification began |
| September 1, 2023 | Dealer notification ended |
| October 12, 2023 | Interim owner notification (was planned for this date) |
| October 17, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
Frequently asked questions
What is recall 23V600?
Recall 23V600 covers 27,418 2015-2023 Mack Granite (Gu) and Granite (Gr) vehicles with turn signals positioned in a way that reduces visibility. Low turn signal visibility can fail to alert other drivers before a turn, increasing crash risk. Mack dealers will add turn signal lighting for free.
What should I do if my 2015-2023 Mack Granite (Gu) or Granite (Gr) is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 23V600. If it is, contact a franchised Mack dealer to schedule the added turn signal lighting. Reference recall number 23V600 and Mack recall number SC0448 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mack's remedy states that dealers will add the additional turn signal lighting free of charge. Parts and labor are covered at a franchised Mack dealer.
What is the safety risk?
The risk is reduced turn signal visibility. If other drivers do not see the truck's turn signal, they get less warning before the vehicle turns, increasing crash risk. The fix is additional turn signal lighting installed by a Mack dealer for free.
When were owners notified about recall 23V600?
Mack mailed owner letters on September 25, 2024. If you bought the truck used or never received a letter, check your VIN to confirm whether your specific Granite (Gu) or Granite (Gr) is included, then call a Mack dealer with recall number 23V600.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V600000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 23V600 |
| NHTSA recall # (full) | 23V600000 |
Source documents
-
Download Quarterly Report (PDF) - Download Recall Investigation Document (PDF) (PDF)
- Download Recall Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Document (PDF) (PDF)
- Download Owner Notice (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →