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May 3, 2021 Service bulletin

This technical bulletin provides a procedure to program the ECM to correct the customers concern.

Chevrolet technical service bulletin 21NA096 for 2021 Chevrolet Silverado 1500 and 2021 GMC Sierra 1500.

Bulletin number
21NA096
Component
Engine and engine cooling
Summary
This technical bulletin provides a procedure to program the ECM to correct the customers concern.

Owners of these vehicles have filed 825 complaints in the engine category.

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