Not sure which 2007 Hummer H3 In-Line Modules are right for you? We have over 1502 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"This is working well. The engine is more relaxed due to more HP. On hills and off the line etc. The installation was painful, the chip din't clip on right. I got it on the 2nd try, the tech told me to put on all my weight on it flat on the ground. I heard a snap and it worked, the instructions does not say that there is a lock clip on the chip. This would have made a big difference connecting it to the PCM. There was little room for the hands to disconnect the wire harness. It was worth it still." —Pablo S from Copperas Cove, TX bought a Jet Performance Module for a 2007 Hummer H3, 3.7L 5-cyl. engine.
"This performance module (being the only one available for this vehicle) is somewhat noticable in acceleration and fuel mileage. However, it is not a huge stand out or an increase in power, but a good solid product." —Jason S from Montgomery, TX bought a Jet Performance Module for a 2007 Hummer H3, 3.7L 5-cyl. engine.
"For GM trucks it's difficult to install due to the small space (30 min. install). After 2 days I noticed performance increase- smoother shifting at different rpm points, more horsepower. DON'T BUY THIS TO SAVE FUEL- it might save you 1 mpg if you're lucky and drive normal, but you'll be wanting to "test" it out so much you'll start loosing fuel mileage. I have this with a JET MAF sensor and a K&N cold air intake all recently installed- total extra mpg w/ everything 3mpg but a big notice in HP." —Cameron S from Pensacola , FL bought a Jet Performance Module for a 2007 Hummer H3.
"HP obviously has increased as well as smoother shifting. Not sure about MPG yet, but will assume with the small advance in HP, MPG should be slightly better. I'm disappointed the unit went on sale and had a $20 mail in rebate after my purchase, but I'm still happy with the price. This is the first (real)PCM I've seen for the Hummer H3. Great service and prompt shipping." —Robert N from Evansville, IN bought a Jet Performance Module for a 2007 Hummer H3, 3.5L 5 cyl. engine.
"I use my h3 for towing, jet performance chip made a world of a difference. I'm impressed!!" —Dirk S from Miller Place, NY bought a Jet Performance Module for a 2007 Hummer H3.
"the cost of performance can be broken into 3 parts,
1 - the price of the item,
2 - the ease of the installation,
3 - The return on the investment for 1 and 2.
the PCM rates out of ten (higher best),
1 - 8
2 - 7
3 - 8
thank you" —John G from London, OH bought a Jet Performance Module for a 2007 Hummer H3, 3.5L 5 cyl. engine.
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