Review on ๐ Fuel-Efficient and High-Performance Performance Chip/Power Programmer for GMC Sierra 2500 & 3500 6.6L Duramax Turbo Diesel - Enhance MPG, Save on Fuel Costs, Amplify Horsepower & Torque! by Jermaine Shuster
So far so good with this product
So far so good with this product. I've only worn it in my 6.6 Duramax for about two weeks and haven't checked the mileage, but it definitely looks better. A little more throttle response, power and smoother shifting! Very happy at the moment.
- Good product for the price
- weak
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