All Mack vehicles built with USA24, and forward emissions may experience damage to the diesel exhaust...
Mack technical service bulletin TSB M-258-017 202610 for 2025-2027 Mack Pioneer PR (4) and 2026-2027 Mack Anthem An (4).
- Bulletin number
- TSB M-258-017 202610
- Component
- Fuel/propulsion system
- Summary
- All Mack vehicles built with USA24, 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.
Vehicles covered
- Mack Pioneer PR (4) 2025-2027 202520262027
- Mack Anthem An (4) 2026-2027 20262027
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