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2003 Hummer H2 Power Programmers & Performance Tuners

Not sure which 2003 Hummer H2 Power Programmers & Performance Tuners are right for you? We have over 5642 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 product was easy to use and has improved the shift points and horse power of my 2003 H2 HUMMER without any loss in MPG. I actually think it is saving me a few MPG on the 87 octane tune setting versus the factory setting. Non the less, it takes off faster and is less of a brick now without any adverse effects. That is a huge plus for a daily driven rig. I have more options to try for sure, but am so happy with the noticeable difference at the moment. Like butter on ice for now vs. before!" —Jeffrey P from Mission Viejo, CA bought a Superchips VIVID Performance Tuner for a 2003 Hummer H2, 6.0L V8.

"Awesome piece of equipment but not for the novice. This tuner has the ability to fine tune almost every aspect of your vehicle. Without knowledge of the items it can tune for you I suggest: either use the installed program or download a proven program, or change it 1 increment at a time and thoroughly test the tune before adjusting again, just to avoid costly damage no covered by any warranty. Monitor the settings with the unit and create a log file and keep it for reference. With oversize tires, cold air induction, and cat back exhaust and predator i am able to improve my gas mileage by over 4.4 mpg with in town driving. And performance thru the roof :-)) AUTOANYTHING was GREAT TOO!" —Randy L from Orlando, FL bought a DiabloSport PC Interface - USB Cable Kit for a 2003 Hummer H2.

In addition to Hummer H2 Power Programmers & Performance Tuners, you may also enjoy one of these popular products: Covercraft Evolution 4 Car Cover, Eibach Pro-Kit Lowering Springs, Coverking Neosupreme Seat Covers.
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Customer Reviews

Hypertech Max Energy Programmer

This did exactly what I was hoping for.

My H2 drove nicely. I wanted to do the mild 87 octane tune and enter my larger tire size into the mix. I also added 25% to shift firmness. It starts up with way more enthusiasm and has a much more enjoyable feel when driving. Less throttle and more power. I have not been able to determine any mpg increase but imagine there must be a bit based on not having to be in the pedal as much as well as the increased responsiveness. View more reviews...
Posted By Jeffery C (Sedona, AZ) / May 11, 2020
2006 Hummer H2
Superchips Flashpaq F5 Tuner

F5 Tuner

I like how much faster the F5 is compared to the F4 . It has better graphics than the F4 and is just a good product overall and it made my truck a lot better to drive with more power and better shifts. I have a cold air intake , cat back exhaust which makes this tuner work even better. View more reviews...
Posted By anthony l (MARTINEZ, CA) / February 2, 2017
2007 Hummer H2
DiabloSport Predator P2 Tuner

Awsome tune for everyone

This only took 5 minutes to do and I was able tune for 87 octane gas. I picked up 2 mile per gallon around town. The hummer is about as aerodynamic as a brick so I really did not see any increase on the highway. A nicer feeling off the line. It make you fell equal to the other vehicles that weigh 3 times less than you do. If you own any hummer or chevy with a LQ9 engine this tune is a must!! View more reviews...
Posted By Walter M (Queensbury , NY ) / January 24, 2009
2006 Hummer H2

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Top 10 Ford F-150 Mods & Upgrades for 2022

Come one, come all to the Ford F-150 Modification Station! Did you just get a new truck, or are looking to beef up an older one? Either way, you’re in the right place. The F-150 is one of our favorite platforms out there because there are just so many parts and directions you can do […] The post Top 10 Ford F-150 Mods & Upgrades for 2022 appeared first on AutoAnything Resource Center.
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