1-888-628-1730 • Mini Maxx Installation Manual 45
20112013 6.6L LML DURAMAX USA / ULSD CALIBRATION
Power Levels
Power levels are not currently shift-on-the-y for the 2011
- 2013 6.6L LML Duramax. To adjust the Power Level, select
Install Download from the Main Menu and follow the on-
screen instructions (this may change so be sure to visit
www.hsperformance.com for product updates).
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 dierent ratings and can be found at www.hsperformance.com/update-instructions.
Speed Limiter
This option allows for the removal of the factory speed limiter. Most 6.6L LML Duramax
trucks have a 98 MPH speed limiter from the factory. The limiter may be removed complete-
ly but WILL result in a loss of cruise control and exhaust brake function. (this may change so be
sure to visit www.hsperformance.com for product updates). This option can only be changed during the
Install Download process.
Tire Size Calibration
(Not currently available for the 2011 - 2013 6.6L LML Duramax. This may change so be sure to visit
www.hsperformance.com for product updates). 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 addition, 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 speed-
ometer to read lower. 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 2011 - 2013 6.6L LML Duramax has what is called
Adaptive Memory and is constantly learning and adapting to dierent 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
POWER LEVELS
Tow .................... 40 HP
Street
................. 80 HP
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