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December 20, 2021 Service bulletin

(Back Office Only) Vehicles Equipped With A Turbo Compound Engine

Mack technical service bulletin KC-275 for 2018-2022 Mack Anthem (An), 2018-2022 Mack Granite (GR) and 2018 Mack Gu and others.

Bulletin number
KC-275
Component
Engine and engine cooling
Summary
(Back Office Only) Vehicles Equipped With A Turbo Compound Engine - Report Of Frequent Air Compressor Cycling. Secondary Air System Air Pressure Decreases Slowly When Engine Is At Low Idle - US17+OBD16 And Newer Emissions, Model Year 2018 And Newer

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