Power TrainOct 1, 2026
MY 2022–2025 · Service Campaign · S5013 202610
Certain AN, GR, and Pl model trucks could experience an issue with the clutch position sensor causing PTO drop out or failure to engage scenario.
EngineOct 1, 2026
MY 2016–2024 · Service Bulletin/Repair Instructions · TSB M-258-015A 202610
All Mack vehicles built with USA17, and forward emissions may experience damage to the diesel exhaust fluid pump harness due to wicking of DEF into the pump connector and harness. To prevent this issue an anti-wicking harness has been developed.
Electrical SystemSep 27, 2026
MY 2026–2027 · Service Bulletin/Repair Instructions · TSB M-373-003 202609
Power Cable Alternator Replacement
Electrical SystemSep 17, 2026
MY 2026–2027 · Service Bulletin/Repair Instructions · CBR 2483-6 202609
Diagnostic instructions for CAN network communication issues.
Power TrainSep 2, 2026
MY 2022–2026 · Service Bulletin/Repair Instructions · TSB M-913-001 202609