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Hummer H3 Power Programmers & Performance Tuners

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Latest Customer Reviews

Hypertech Max Energy Programmer Reviews

Hypertech Max Energy Programmer for 2008 H3 Hummer 3.7L

Reviewed By Shawn J (CLOVIS, CA) Reviewed for a 2008 Hummer H3 —8/13/2014 11:57 PM

I wanted something that I could program myself instead of sending of my PMC to someone eles to program. I was able to change my tire size to compensate for the 33in tire I installed, also was able to change my shift point and shift firmness as well. It also came with two performance setting, an 87 and a 91 octane. I used the 87 octane in my 3.7 liter and I got a boost in performance and mileage as well. Which made me very happy.

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DiabloSport inTune i3 Tuner Reviews

Must Have

Reviewed By Taylor Y (Springfield, MA) Reviewed for a 2014 Chevy Silverado —3/14/2018 4:50 AM

This is a must have product that works great improves power and fuel economy.

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DiabloSport Predator P2 Tuner Reviews

09 "Mahoe" with 33's

Reviewed By Todd L (Napoleon, OH) Reviewed for a 2009 Chevy Tahoe —3/13/2018 5:18 PM

Didn't want to look like every other mom. Put 2.5 level kit with 33x12.50x20 mt's. Shifted like crap b4 the Predator. Shifts great,and noticeable performance.

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