2011-2012 6.6L GM Duramax LML / LGH
Click each option for details:
Power Levels
Power Levels
DPF Removed
- Stock HP
- Mild: 50 HP
- Wild: 100 HP
- Hot: 150 HP
*An additional unlock fee may apply for DPF Removed tuning.
Power Levels
DPF Present
- Mild: 40 HP
- Wild: 80 HP
Default Power Levels
Power levels are not currently shift-on-the-fly for the 2011 – 2012 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 in the future).
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.
Emissions
DPF Selection
The DPF or Diesel Particulate Filter is part of the factory exhaust system on the 6.6L LML Duramax. H&S offers tuning that allows the DPF to be left in place, or removed completely.If you are planning on leaving the exhaust system stock with the DPF in place, you will select PRESENT.If you have already removed the DPF or if you plan on removing the DPF immediately after installing your H&S tuning device, you will select REMOVED. If you select REMOVED, you must Accept our DPF Disclaimer in order to continue with the Install Download process.
Note: Installation of DPF removed tuning will require the purchase of H&S Part # 111006
DPF / Exhaust Sensors
When running DPF PRESENT 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 DPF REMOVED 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. Installation of DPF removed tuning will require the purchase of H&S Part # 111006.
UREA / SCR System
On the 2011 – 2012 6.6L LML Duramax, there is a UREA system that needs to be unplugged when running DPF REMOVED tuning. The UREA system must at least be unplugged but can be completely removed from the vehicle if desired. Failure to unplug the UREA system may result in a check engine light and/or dash messages, erratic engine operation, and loss of power.
Note: UREA system removal instructions found HERE
EGR Unplug / Delete
If you are installing H&S DPF REMOVED tuning, you must unplug the EGR system on your 6.6L LML Duramax if not installing a complete EGR delete. Failing to do so may result in erratic engine operation and loss of power.
Note: Emissions removal instructions found HERE
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 can be removed completely but may result in a loss of cruise control, exhaust brake, and other functions (this may change so be sure to watch for product updates). This option can only be changed during the Install Download process.
*Note: may result in a loss of cruise control, exhaust brake, and other functions
Transmission Tuning
Transmission Reset / Relearn
The automatic transmission on the 2011 – 2012 6.6L LML 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!
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.
Available Gauges to Monitor (PID’s)
- Current Power Level
- Transmission Gear Position
- Torque Converter Status
- Pyro 1
- Pyro 2
- Speed
- Boost Pressure
- Engine RPM
- Coolant Temperature
- Throttle Percentage
- Intake Air Temperature
- Barometric Pressure
- Battery Voltage
- Fuel Rail Pressure (ICP)
- Transmission Temperature (Auto)
- Load Percentage
- Injection Timing
Accessories / Recommended Products
