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Chevy Transmission Needs Reset

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Some owners of 2012-2013 Chevy Avalanche or 2012-2014 Silverado may experience a harsh 6-4 downshift

Some owners of 2012-2013 Chevy Avalanche or 2012-2014 Silverado may experience a harsh 6-4 downshift. The customer may note that during a heavy throttle application, a tie-up feeling followed after the throttle has been released, by a harsh 6-4 downshift.

Perform the Reset Transmission Adapts in the service manual. Road test to see if the condition has been corrected. If not, this bulletin does not apply. 

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