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August 4, 2003 Service bulletin

This vme message applies to the valve body for the allison series 1000 transmission revised for the 2004...

Chevrolet technical service bulletin 080403 for 2001-2004 Chevrolet Silverado and 2001-2004 GMC Sierra.

Bulletin number
080403
Component
Power train
Summary
This vme message applies to the valve body for the allison series 1000 transmission revised for the 2004 model year to add modulated main pressure control. This revision will provide additional transmission oil cooler flow and reduce pump load during certain low speed operating conditions. Tt

Owners of these vehicles have filed 343 complaints in the transmission category.

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