H&S Mini Maxx Street Tuner Diesel Downloader (# 109007)
The Mini Maxx Street tuner is the next generation of diesel downloaders from H&S that combines high performance tuning with a complete set of digital gauges. With the flexibility of shift-on-the-fly tuning, plus the safety of automatic de-fueling, the Mini Maxx Street tuner has you covered. All Mini Maxx Street tuners come pre-loaded with 4 power levels that can be changed at any time, on the fly. Whether you simply want some extra power to pass when towing, or want an all-out high performance tune, the Mini Maxx Street tuner has what you need!
The H&S Mini Maxx Street Tuner will work on any of the following vehicles:
2008-2010 Chevy GMC 6.6L Duramax*
Reads/Clears Diagnostic Trouble Codes
Internet Update-able with included SD Memory Card & USB adapter
Custom Tunes are FREE to download. Check the Mini Maxx Updates section to see what is available for your product.
Mini Maxx can only be installed on one vehicle at a time.
Default Power Levels
Power Levels can be adjusted on-the-fly at the touch of a button after Installing the Download to the vehicle. To adjust the Power Level, select Change Power Level from the Main Menu.
Note: The Power Level ratings listed may not be exact for your particular vehicle. The listed ratings apply to the out-of-the-box tuning that H&S tuning devices are shipped with. Any custom downloads may result in different ratings.
Power Levels - DPF Present
• Stock HP Tow: 40 HP
• Street: 80 HP
• Performance: 120 HP
This option allows for the adjustment of the factory speed limiter. Most 6.6L LMM Duramax trucks have a 98 MPH speed limiter from the factory. The limiter can be adjusted from 50 MPH to 95 MPH or removed completely. This option can only be adjusted during the Install Download process.
Tire Size Calibration
This option allows for the re-calibration of the factory speedometer to adjust for non-stock sized tires. For the most accurate speedometer reading when using non-stock sized tires, it is best to measure the diameter of the tire using a tape measure rather than going by the printed tire size. In additon, using a GPS is a great way to dial in your factory speedometer. Entering a larger tire size will cause the factory speedometer to read higher while entering a smaller tire size will cause the factory speedometer to read lower. The tire size can be adjusted from 25” to 60”. This option can only be adjusted during the Install Download process.
Note: On some vehicles, entering a tire size larger than 35” may cause the ABS light to illuminate.
Transmission Reset / Relearn:
The automatic transmission on the 2007 – 2010 6.6L LMM Duramax has what is called Adaptive Memory and is constantly learning and adapting to different horsepower levels, temperatures, driving habits, etc. We highly recommend performing a Transmission Reset / Relearn procedure after installing H&S tuning to help the transmission perform correctly with the added horsepower. The transmission will eventually learn over time on its own, but the relearn procedure gives a good baseline for the adaptive learning and helps to speed up the learning process. To perform the relearn procedure, please follow these instructions: When re-training the transmission, ALWAYS follow posted speed limits. Do NOT attempt runs in adverse weather conditions such as snow, ice, rain, wind, or any other conditions that may affect your vehicles traction or impair your visibility!
- After you have installed the H&S tuning, turn the key to the ON position. From the Main Menu, scroll down until you see the Reset Transmission option. Select Reset Transmission and follow the on-screen instructions to reset the transmission adaptive memory.
- After the transmission reset is complete, it is recommended to perform each of the following 0-80 MPH runs while in the HOT power level:
• 0-80 MPH @ 25% throttle position, then slow down and come
to a complete stop.
• 0-80 MPH @ 50% throttle position, then slow down and come to a complete stop.
• 0-80 MPH @ 100% throttle position, then slow down and come to a complete stop.
The Transmission Relearn procedure is complete.
Note: On any vehicle using 3” or larger lift blocks under the rear leaf pack, it is HIGHLY RECOMMENDED to install traction bars when adding additional horsepower
If you are interested in obtaining a High Sulfur Calibration unlock, then please call us at (800) 823-4444.