2005-2010 Hummer H3 3.5 Mail Order Tune

Our performance upgrade for the 2005-2010 Hummer H3 usually gives you an increase of 10-14 horsepower and improves your fuel efficiency by 1-3 miles per gallon (more if you've made other modifications to your vehicle). It also enhances your ability for smooth acceleration, towing, overall drivability, and makes your vehicle feel more energetic from a standstill. Our tuning works with all versions of H3, including SUVs with both five and eight cylinders, as well as Alpha Trucks. Please note that if you have an automatic transmission from 2008 or later, there is an additional transmission control module. If you're sending in your PCM, please include this module as well.

You will send us your computer, or we can provide you with one for extra.

• Change transmission type (4L60e,4L80e, Manual or non-electric auto)

• Delete VATS

• Change Axle Ratio

• Change Tire Size

• Remove speed limiter

• Remove torque management - Torque abuse modes are modified to eliminate bog at launch

• Remove unused engine codes (Leave in notes what you need turned off)

• Emissions Removal For "NOT FOR STREET" rear O2, Cat, EVAP, EGR.

• Fueling modified for WOT (Wide Open Throttle) performance

• Timing modified for WOT performance

• Raised rev limiter

• Raised shift points

• Removes lag by changing downshift tables

• Transmission line pressure increased

• MAF calibration is year specific

• PE engagement adjusted to reduce KR

• Torque converter lockup tables modified to improve transmission life and eliminate converter lockup hunting

• Correct VIN number

• Enable E85 Flex Fuel

• V8 Swap