Ok guys....I've tuned two D-maxs LBZ 2006/2007 (my Father and Brother)....I've put dozens of tunes into both of them without fail. However, they both wanted a tune to try something in there trucks...different transmission settings is all that changed (Engine was tuned to MPG and 80hp). Both of the ECMs have CRASHED!!! This is a problem guys. I need to check to make sure my box is not causing this or whether its GM poor engineering.
Done everything I know to do to prevent this:
Shut off all lights, Turn off compass mirror, Running lights, etc.
However, I can tune my 2002 5.3L, 2001 3.1L, and 2007 TBSS all day long without problems.
Any help would be appreciated!