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December 14, 2022 Service bulletin

This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to...

Chevrolet technical service bulletin 21-NA-124 for 2000-2023 Chevrolet Malibu, 2000-2023 Chevrolet Silverado 1500 and 2000-2020 Chevrolet Impala and others.

Bulletin number
21-NA-124
Component
Engine and engine cooling
Summary
This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.

Owners of these vehicles have filed 31,691 complaints in the engine category.

Vehicles covered

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