H&S XRT Pro - 6.6 L LML Duramax High Sulfur

38 XRT Pro Installation Manual • www.hsperformance.com
20112013 6.6L LML DURAMAX HIGH SULFUR 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 Change Power Level 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 dierent rat-
ings and can be found at www.hsperformance.com/update-instructions.
Emissions Selection
Most 2011-2013 6.6L LML Duramax’s are equipped with an emissions system designed to
run Ultra Low Sulfur Diesel (ULSD) Fuel. If you have removed or modied this emissions
system (or plan to immediately after installing this device), proper tuning must be installed
or the vehicle will not operate correctly. Select REMOVED at this option for a modied
emissions system and high sulfur fuel use. Select PRESENT if your emissions system requires
ULSD fuel.
Exhaust Emissions Equipment
When running ULSD tuning, it is required that all sensors located in the exhaust system stay
in place and plugged in, otherwise you may experience a Check Engine Light (CEL) and even
a loss of power (limp mode).
When running High Sulfur tuning, it is required that all sensors located in the factory
exhaust system be unplugged from the electrical harnesses EXCEPT FOR THE PRESSURE
SENSOR WHICH MUST REMAIN PLUGGED IN. All sensors other than the Pressure Sensor
can be removed completely with the factory exhaust if desired. On the 6.6L LML Duramax,
there are usually 3 EGT Sensors, 1 NOx Sensor, 1 UREA Injector, and 1 Pressure Sensor.
The DPF Pressure Sensor is located under the bed in
front of the axle on the inside of the passenger side
frame rail. You may pull the two rubber lines o of the
sensor but DO NOT UNPLUG THIS SENSOR! Un-
plugging of the Pressure Sensor may result in erratic
engine operation and loss of power.
POWER LEVELS
Stock .................... 0 HP
Tow
.................... 50 HP
Street
............... 100 HP
Performance
.... 150 HP