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Hummer H3 Fuel Economy Tuners & Programmers

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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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Jet Performance Programmer Reviews

jet performance programmer

Reviewed By Randy R (TUCSON, AZ) Reviewed for a 2009 Hummer H3 —9/7/2013 9:24 AM

Not bad. But not great by any stretch. It did correct my speedometer for my 35' tires. Small gain in mid range horsepower but theres a trade off because to really notice I have to mash the pedal in which case I lose a lot of mpg's. I get it, that, that is supposed to happen anyway but it seems much more significant to me now. Anyhow, its an OK product but I know now I probably should have went with something more high end. -2009 Hummer H3T Alpha 5.3L V8

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