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DrewJitsu · 03-12-2010, 11:52 PM

The place where i dyno'd mine said the same thing, HP tuner didnt have a new enough firmware update for my transmission. I have been waiting about a month also.

03-12-2010, 11:52 PM	#11
DrewJitsu Drives: ZL1, 2012 3500 Duramax Dually 4x4 Join Date: Jan 2010 Location: Lubbock, TX Posts: 51 View My Garage	The place where i dyno'd mine said the same thing, HP tuner didnt have a new enough firmware update for my transmission. I have been waiting about a month also.