Recall 21V476 affects 8 2020-2021 Mack Granite (Gu) trucks for short suspension pivot cap screws. Repair is free at any franchised Mack dealer.
Mack is recalling 8 2020-2021 Granite (Gu) trucks equipped with SL2065 steerable lift axles because lower rear pivot cap screws are too short to fully engage the locking nuts. If the hardware separates from the suspension system, it can become a road hazard and increase the risk of a crash or injury; Mack dealers will complete the repair free of charge.
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What's wrong?
The SL2065 steerable lift axle on the 2020-2021 Mack Granite (Gu) is an auxiliary axle that helps carry load and turns with the truck. Its lower rear pivot cap screws fasten part of the axle pivot assembly, keeping the lift axle aligned as the suspension raises, lowers, and moves under road load.
On affected trucks, some lower rear pivot cap screws were made at the low end of the length specification. During installation, the screws do not extend far enough through the pivot nuts to fully engage the nuts' locking feature. Without that full engagement, the joint loses the clamping strength it needs, and a cap screw can loosen, fracture, or be lost.
Warning signs include too few cap screw threads showing beyond the end of the pivot nut, a missing pivot nut, or a suspension that does not lift or lower correctly. Owners can also notice suspension noise or vibration before the pivot hardware fails.
Who's affected?
Covers the 2020 and 2021 model years with the same lift-axle suspension component.
| 2021 Mack Granite (Gu) | suspension component |
|---|---|
| 2020 Mack Granite (Gu) | suspension component |
| Units affected | 8 |
| 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?
Short lower rear pivot cap screws can let suspension hardware separate and fall onto the road, creating a road hazard and increasing the risk of a crash or injury. Warning signs include too few screw threads past the pivot nut, a missing pivot nut, suspension that will not lift or lower properly, noise, or vibration. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2020-2021 Mack Granite (Gu) is included in this recall.
- Contact a franchised Mack dealer to schedule the free suspension inspection and lower rear pivot cap-screw repair that keeps the lift-axle hardware secured.
- Bring the owner letter if you have it, and reference recall number 21V476 and Mack recall SC0426 when you call.
- Keep extra space around traffic until the repair is complete, because separated suspension hardware creates a road hazard.
What happens at the repair
At the dealer, a Mack technician inspects the suspension system on the affected Granite truck and replaces the lower rear pivot cap screws if the inspection shows they are needed. The recall repair is free, with parts and labor covered. If you already paid for a related repair before the owner notice, Volvo Group's reimbursement plan handles eligible claims. Bring repair paperwork and proof of payment to the service desk so Mack can review the claim under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| June 25, 2021 | NHTSA published the recall |
|---|---|
| July 16, 2021 | Dealer notification began |
| July 16, 2021 | Interim owner notification (was planned for this date) |
| July 30, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V476?
Recall 21V476 covers 8 2020-2021 Mack Granite (Gu) vehicles with certain SL2065 steerable lift axles. The lower rear pivot cap screws are too short to fully engage the locking nuts. If the hardware separates from the suspension, it can become a road hazard and increase crash or injury risk.
What should I do if my 2020-2021 Mack Granite (Gu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 21V476. If it is, contact a franchised Mack dealer to schedule the suspension inspection and lower rear pivot cap screw replacement. Reference recall number SC0426 when you call.
Is the recall repair free?
Yes, the recall repair is free. Federal recall law requires the manufacturer to repair the defect at no cost, and Mack will inspect the suspension system and replace the lower rear pivot cap screws, as necessary, free of charge.
What is the safety risk in recall 21V476?
The safety risk is road debris from separated suspension hardware. For affected Mack Granite (Gu) trucks, short lower rear pivot cap screws can let hardware separate from the suspension system, creating a road hazard and increasing the risk of a crash or injury.
When were owners notified about recall 21V476?
Mack mailed owner notification letters on July 30, 2021. The recall repair is available now, so an included 2020-2021 Mack Granite (Gu) owner can call Mack customer service at 1-800-866-1177 or a franchised Mack dealer and reference SC0426.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V476000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 21V476 |
| NHTSA recall # (full) | 21V476000 |
Source documents
-
Download Quarterly Report (PDF) - Download Misc. Document (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Report (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 →