Service bulletins for the 2026 Mack Granite
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
33 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with type: Service campaign are shown. Show all
| S4990 202606 | 2026-06-29. Service campaign. STRUCTURE:BODY. The crossmember may come in contact with certain driveshaft U-joint configurations. |
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| S4650 102025 | 2025-11-03. Service campaign. SUSPENSION. SC - The vehicle’s torque rod bracket hardware may have incorrect coating that requires different torque specifications. |
| S4584 092025 | 2025-10-01. Service campaign. STEERING; UNKNOWN OR OTHER. The vehicle’s steering shaft support bracket may have been assembled with incorrect hardware. |
| S4579 092025 | 2025-10-01. Service campaign. UNKNOWN OR OTHER; POWER TRAIN. Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware. |
| S4574 072025 | 2025-08-04. Service campaign. POWER TRAIN. SC - Mack Trucks has identified that certain truck models may have been assembled with incorrectly torqued interaxle prop shaft U-joint hardware. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.