The GDP Tuning DSP5 Switch for your 2001-2010 GM 6.6L Duramax works in conjunction with the GDP EFILive Tuning. With the DSP5 switch, you can change your tuning "on-the-fly". Tuning not included, you must have DSP5 Tuning for use with this switch. 
 
FEATURES: 
	
For Use With DSP5 Tuning
	
Includes Needed Components For Installation
 
Note: Image shows DSP5 switch for 2004.5-2005 LLY.  Other applications may vary.