Recall 15V528 affects 84 2011-2016 Mack Granite (Gu) trucks for insufficient air brake reservoir volume. Repair is free at any franchised Mack dealer.
Mack is recalling 84 2011-2016 Granite (Gu) trucks because the air brake system reservoir lacks enough volume and fails the FMVSS 121 air brake standard. For included trucks, an undersized reservoir affects braking performance and increases the risk of a crash; the Mack dealer repair will be free once available.
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What's wrong?
The air brake reservoir on 2011-2016 Mack Granite (Gu) trucks is the tank that stores compressed air for the service brake system. The compressor fills this tank, and the stored air is used when the driver presses the brake pedal. Air brakes depend on enough reserve volume so the system has air available through repeated brake applications.
On the affected trucks, Mack found incorrect information in an air tank calculation table for certain configurations. That error allowed some trucks to be built with an air brake reservoir that does not have enough volume. Because the reservoir is undersized for those configurations, the trucks do not meet Federal Motor Vehicle Safety Standard 121 for air brake systems.
An owner is not given a normal dashboard symptom or pedal change from this sizing problem before it matters. There is no warning sign before failure.
Who's affected?
The scope stays within a single Granite (Gu) model line and a single brake system component across 2011-2016.
| 2013 Mack Granite (Gu) | brake system |
|---|---|
| 2012 Mack Granite (Gu) | brake system |
| 2011 Mack Granite (Gu) | brake system |
| 2016 Mack Granite (Gu) | brake system |
| 2015 Mack Granite (Gu) | brake system |
| 2014 Mack Granite (Gu) | brake system |
| Units affected | 84 |
| 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?
Insufficient air brake reservoir volume can affect braking performance and increase the risk of a crash. Schedule the recall repair soon, and treat any change in braking feel or stopping response as a reason to call the dealer before driving farther. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2011-2016 Mack Granite (Gu) is included in this recall.
- Contact a franchised Mack dealer and ask whether the free air-brake-reservoir volume repair is open for your VIN.
- Reference recall number 15V528 when you call, and have the owner notice ready if Mack mailed one.
- Schedule the air-brake-reservoir volume repair that adds brake air capacity for affected braking performance.
- Drive cautiously until the repair is complete. Leave extra following distance and avoid heavy braking when traffic allows.
What happens at the repair
The repair described for this recall is additional air brake reservoir volume. Once the dealer repair is available, a Mack technician adds the reservoir capacity needed for the air brake system, free under the recall. No repair time is listed, so ask the service desk how long the truck will be down before arranging drop-off. Parts and labor are covered once the repair is open.
Timeline
| August 18, 2015 | NHTSA published the recall |
|---|---|
| August 19, 2015 | Dealer notification began |
| August 19, 2015 | Dealer notification ended |
| October 13, 2015 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| October 13, 2015 | Interim owner notification (was planned for this date) |
| October 15, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V528?
Recall 15V528 covers 84 2011-2016 Mack Granite (Gu) trucks with an air brake reservoir that lacks enough volume. That defect can affect braking performance and increase crash risk. Mack dealers will add additional air brake reservoir volume for free.
What should I do if my 2011-2016 Mack Granite (Gu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 15V528. If it is, contact a franchised Mack dealer to schedule the air brake reservoir repair. Reference recall 15V528 or Mack recall number SC0394 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 states that dealers will add additional air brake reservoir volume free of charge at a franchised Mack dealer.
What is the safety risk?
The safety risk is reduced braking performance from an air brake reservoir with insufficient volume. That condition can increase crash risk, especially when the truck depends on full air brake system capacity. If your VIN is included, arrange the free dealer repair.
What if I bought my Mack Granite (Gu) used?
The free repair still applies. Recalls follow the truck, not the original owner. Check your VIN to confirm whether your specific Granite (Gu) is included, then call a franchised Mack dealer with recall 15V528 or Mack recall number SC0394.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V528000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 15V528 |
| NHTSA recall # (full) | 15V528000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Document (PDF) (PDF)
- 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 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →