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August 1, 2008 Service bulletin

Gmc: flare and or harsh 2-3 shifts

Chevrolet technical service bulletin PIP-4395 for 2007-2009 Chevrolet Silverado 1500, 2009 Chevrolet Tahoe and 2007-2009 GMC Sierra 1500 and others.

Bulletin number
PIP-4395
Component
Power train: automatic transmission
Summary
Gmc: flare and or harsh 2-3 shifts. This condition may be caused by leaking 1-2-3-4 and 3-5-r clutch fluid seal rings (230). Models cadillacs, chevrolets, gmc, hummers, pontiacs. Equipped with 6l80 (rpo myc) or 6l90 (rpo myd) automatic transmission.

Owners of these vehicles have filed 410 complaints in the transmission category.

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