Ford 6.4
On the 6.4L It is not required to unplug or block-off the EGR system. The EGR system is already disabled in the tuning and will not function under any conditions. If desired, the entire EGR system can be unplugged, blocked-off or completely removed when running this tuner. Remove ALL sensors located in the factory exhaust system. There are usually 3 EGT sensors and 1 pressure sensor
 
Ford 6.7
On the Ford 6.7L you MUST unplug the EGR system if not installing an EGR delete. Failing to do so may result in damage to your EGR system. The UREA system can be unplugged or removed completely. Remove ALL sensors located in the factory exhaust system. There are usually 3 EGT sensors, 1 NOX sensor, 1 UREA Injector and 1 pressure sensor.
 
Dodge 6.7
On the 07-09 you must unplug the EGR system if not installing an EGR delete. It is not required to unplug or block-off the EGR system on the 10-12. The EGR system is already disabled in the tuning and will not function under any conditions. If desired, the entire EGR system can be unplugged, blocked-off or completely removed when running this tuner. On the 11-12 Cab & Chassis there is a UREA system that must be unplugged or removed completely. Failure to unplug the UREA system may result in a check engine light and/or dash messages. When running this tuner it is recommended that all sensors located in the factory exhaust system be unplugged from the electrical harnesses. These sensors can also be removed completely with the factory exhaust if desired. There are usually 3 EGT sensors, 2 O2 sensors and 1 pressure sensor on the 07-09 and 3 EGT sensors, 2 O2 sensors and 1 Pressure sensors on the 10-12.
 
Duramax LMM
It is not required to unplug or block-off the EGR system. It’s recommended that all sensors in the factory exhaust be unplugged from the electrical harnesses. 
 
Duramax LML
You must unplug the EGR system if not installing a complete EGR delete. The UREA system must also be unplugged or completely removed. All sensors in the exhaust must be unplugged from the electrical harnesses.  EXCEPT FOR THE PRESSURE SENSOR WHICH MUST REMAIN PLUGGED IN. 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 off of the sensor but DO NOT UNPLUG THIS SENSOR! Unplugging of the Pressure Sensor may result in erratic engine operation and loss of power.

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