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March 22, 2023 Service bulletin

This technical bulletin provides a procedure to replace the rear differential fluid to correct the rear...

Chevrolet technical service bulletin 21-NA-028 for 2021-2023 Chevrolet Tahoe, 2021-2023 Chevrolet Suburban and 2021-2023 GMC Yukon and others.

Bulletin number
21-NA-028
Component
Power train
Summary
This technical bulletin provides a procedure to replace the rear differential fluid to correct the rear clutches from chattering, which create a moan type noise.

Owners of these vehicles have filed 449 complaints in the transmission category.

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