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October 7, 2020 Service bulletin

This technical bulletin provides a procedure to program the ECM if found the

Chevrolet technical service bulletin 20NA204 for 2021 Chevrolet Tahoe, 2021 Chevrolet Suburban and 2021 GMC Yukon and others.

Bulletin number
20NA204
Component
Engine and engine cooling: engine: engine control module (ecu/ECM)
Summary
This technical bulletin provides a procedure to program the ECM if found the cause of the customers concern.

Owners of these vehicles have filed 684 complaints in the engine category.

Vehicles covered

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