July 7, 2026 Service bulletin

"The software is not yet available

Kenworth technical service bulletin 43-088 for 2020-2025 Kenworth T680, 2020-2025 Peterbilt 579 and 2020-2025 Peterbilt 389 and others.

Bulletin number: 43-088
Component: Engine
Summary: "The software is not yet available. The bulletin will be updated when more information is available."

Owners of these vehicles have filed 4 complaints in the engine category.

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