Duramax 2001 - 2005 Six Speed Conversion

Duramaxtuner introduces Six Speed Conversion for the 2001 - 2005 Duramax. For years, early Duramax owners endured barbs from owners of newer model trucks because they lacked that sixth gear.
The five-speed Allison offers everything required for extra gear except the tuning and valve body upgrades.
Duramaxtuner's Six Speed Conversion reduces engine RPM because it allows for a lock-up in sixth gear and that results in fuel savings. You'll also experience a quieter ride. The higher gear is also displayed in the EDGE CTS 2 monitor.
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