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August 20, 2020 Service bulletin

Engine

Chevrolet technical service bulletin PIP5647B for 2016-2020 Chevrolet Malibu, 2019-2020 Chevrolet Silverado 1500 and 2021 Chevrolet Tahoe and others.

Bulletin number
PIP5647B
Component
Engine
Summary
This Preliminary information communicates A vehicle may have a concern of running poor and stalling. No trouble codes may be set referencing this condition. Fuel trims around -20% may be observed on both banks. Engine oil level will be found over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. Small gas engines (SGE) May only have the engine oil level over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. This concern is caused by marshalling the vehicle around the lot before it is sold and/or short driver cycles.

Owners of these vehicles have filed 3,651 complaints in the engine category.

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