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May 25, 2021 Service bulletin

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

Chevrolet technical service bulletin 21NA124 for 2000-2021 Chevrolet Malibu, 2006-2014, 2017-2021 Chevrolet Silverado 1500 and 2000-2020 Chevrolet Impala and others.

Bulletin number
21NA124
Component
Electrical system
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 32,949 complaints in the electrical category.

Vehicles covered

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