Recall 15V804 affects 679 2010-2016 Mack Granite (Gu) trucks for brake imbalance between steer and drive axles. Repair is free at any franchised Mack dealer.
Mack is recalling 679 2010-2016 Granite (Gu) trucks under recall 15V804 because a brake imbalance between the steer and drive axle brakes can overheat the rear brakes. Overheated rear brakes increase the risk of a tire blowout or wheel-end fire, and Mack dealers will complete the repair free of charge.
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What's wrong?
The 2010-2016 Mack Granite (Gu) uses air disc brakes with brake chambers at the axles. A brake chamber is the round air-powered actuator that converts compressed air into mechanical force, so the brake caliper applies the disc brake. The steer and drive axle brakes need to share braking work in the intended balance.
On these trucks, the brake chambers are the wrong size for that balance. The mismatch puts too much braking work on the rear brakes compared with the steer axle brakes. During normal service, that brake imbalance can make the rear brakes overheat. Mack's repair uses different size brake chambers to correct the imbalance.
There is no warning sign before failure. If the rear brakes overheat, the driver is not given a specific early symptom in the recall filing, so the VIN check and dealer inspection decide whether this recall applies.
Who's affected?
Spans Granite (Gu) trucks from 2010-2016, all tied to the same brake system component.
| 2013 Mack Granite (Gu) | brake system |
|---|---|
| 2011 Mack Granite (Gu) | brake system |
| 2012 Mack Granite (Gu) | brake system |
| 2010 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 | 679 |
| 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?
In NHTSA campaign 15V804, overheated rear brakes increase the risk of a tire blowout or a wheel-end fire. Schedule the recall repair soon and avoid putting the truck back in service if brake overheating is suspected. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2010-2016 Mack Granite (Gu) is included in this recall.
- Contact a franchised Mack dealer to schedule the free brake-chamber replacement that corrects the steer and drive axle brake imbalance.
- Tell the dealer this is recall number 15V804, Mack recall SC0398, and bring the recall notice if you have it.
- Limit driving until the repair is complete. Watch for brake overheating, tire problems, smoke, or fire, and stop safely if those signs appear.
What happens at the repair
At the dealer, a Mack technician replaces the brake chambers on either the steer axles or the drive axles to correct the brake imbalance. The replacement parts and labor are free under the recall. If you already paid out of pocket for a related brake chamber or brake imbalance repair before the recall notice, Mack's standard reimbursement plan is the path for a reimbursement request. Bring repair paperwork and proof of payment to the service desk so the claim can be reviewed.
| Reimbursement | Reimbursement available |
|---|
Timeline
| November 30, 2015 | NHTSA published the recall |
|---|---|
| December 2, 2015 | Dealer notification began |
| December 2, 2015 | Dealer notification ended |
| January 25, 2016 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| January 25, 2016 | Interim owner notification (was planned for this date) |
| January 27, 2016 | Owner notification mailed |
Frequently asked questions
What is recall 15V804?
Recall 15V804 covers 679 2010-2016 Mack Granite (Gu) trucks with a brake imbalance between the steer and drive axle brakes. The imbalance can overheat the rear brakes, which increases the risk of a tire blowout or wheel-end fire. Mack dealers replace the affected brake chambers for free.
What should I do if my 2010-2016 Mack Granite (Gu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 15V804. If it is, contact a franchised Mack dealer to schedule the brake chamber replacement on the steer axle or drive axle. Reference recall 15V804 or Mack recall number SC0398 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mack dealers will replace the affected brake chambers free of charge. Parts and labor are covered at any franchised Mack dealer for trucks included in recall 15V804.
What is the safety risk?
The safety risk is rear brake overheating. If the rear brakes overheat, the truck has an increased risk of a tire blowout or a wheel-end fire. The free dealer repair corrects the brake imbalance between the steer and drive axle brakes.
What if I bought my Mack Granite (Gu) used?
The free recall repair still applies. Recall coverage follows the truck, not the first owner. Check your VIN to confirm whether your specific 2010-2016 Mack Granite (Gu) is included, then call a franchised Mack dealer with recall 15V804 or Mack recall number SC0398.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V804000 |
|---|---|
| Mack customer service | 1-800-528-6586 |
| NHTSA recall # | 15V804 |
| NHTSA recall # (full) | 15V804000 |
Source documents
-
Download Misc. Document (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 →