Certain chassis with Cummins X15N engines require updated engine harness relays due to the risk of water...
Kenworth technical service bulletin 45-071 for 2025-2026 Kenworth T680, 2025-2026 Peterbilt 579 and 2025-2026 Kenworth T880 and others.
- Bulletin number
- 45-071
- Component
- Engine
- Summary
- Certain chassis with Cummins X15N engines require updated engine harness relays due to the risk of water intrusion.
Vehicles covered
- Kenworth T680 2025-2026 20252026
- Peterbilt 579 2025-2026 20252026
- Kenworth T880 2025-2026 20252026
- Peterbilt 567 2025-2026 20252026
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