The DSP5 Switch for your 2001-2004 GM 6.6L Duramax works in conjunction with any DSP5 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.
- For Use With DSP5 Tuning
- Includes Needed Components For Installation
Switch may not match picture but will be the correct one for your truck.