Reviewed By Tim B (CORINNE, UT) Reviewed for a 2003 GMC Sierra —2/24/2016 5:28 AM
i would have thought that you could adjust between performance , towing ect. without redoing the whole set up. other than that i am completely satisfied.
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Reviewed By Kenneth P (East Carbon, UT) Reviewed for a 2003 GMC Sierra —6/19/2011 6:48 PM
The DiabloSport tuner did exactly what they said it would do with the performance tunes. It really made a difference in the performance of my 6.6 Duramax. However I have experienced a problem where certain tunes have caused a buzzing noise coming from the dash after a tune is put into the computer, still waiting on a solution.