Tcm tuning 01-10 duramax tune only
Transmission tuning for 2001-2010 duramax. Recomended for built transmison trucks! Get better torque converter lockup during wide open throttle to put the power to the ground! Also a better more crisp shift! Must have a 608 tuning auto cal, your own Efi live v2, or have me flash it in in person!