EFILive tuning for the 2001-2010 Duramax is now available to meet your desired horsepower gains. Each AutoCal will come with 5 tunes. When you purchase a GDP Tuning AutoCal you will be ready to unleash the beast that’s locked inside of your truck. 2001-2006 DSP5 TUNING ONLY
2006-2010 6.6L Duramax tunes are configured in DSP-5 format. This configuration requires a DSP-5 switch for power level adjustment.
Power Levels:
Switch Position |
Power Level Name |
HP Rating |
Position #1 |
NO POWER |
+20HP |
Position #2 |
TOW |
+50HP |
Position #3 |
STREET |
+120HP |
Position #4 |
PERFORMANCE |
+175HP |
Position #5 |
RAMPAGE |
+260HP |