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Latest Customer Reviews
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2007 Trailblazer SS
Reviewed By David P (Aurora, IL) Reviewed for a
2007Chevy Trailblazer—12/14/2011 11:58 AM
I used the express performance tune. It installs quickly and I do notice a harded shift into 2nd gear and more power. It hasn't helped me with fuel economy. I will try the 87 octane tune when I go on a long trip