1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

2012 Duramax 6.6 Mileage Improvement Options

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February 23rd, 2017, 2:08 PM

RalphH

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2012 Duramax 6.6 Mileage Improvement Options

What tuners offer the best mileage improvement and light towing options for this model?

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