How to: Build a BENCH HARNESS & FREE ECM TUNING FOR 1999-2007 GM LS1 ECU
Build a bench harness for your 99-2007 GM ECU Download the APP LS Droid created by Pete Sontagg on your Android device (Reads and Writes the factory ECU) Download the info from your phone to your PC and tune away using the free program Tuner Pro. upload the file back onto your phone and Write it back onto the ECM.
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