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September 11, 2026 Service bulletin

"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes

Kenworth technical service bulletin P001 for 2011-2027 Kenworth T680, 2002-2016, 2021 Peterbilt 379 and 2006-2027 Peterbilt 579 and others.

Bulletin number
P001
Component
Engine
Summary
"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."

Owners of these vehicles have filed 63 complaints in the engine category.

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