Hey guys i was just wanting to maybe have some insight...i tried multiple times recently to read on a 98 vortec and with 7.5 i had no luck at all, i tried multiple times. But then i tried with v8 and it read flawlessly. However, i had no touble whatsoever flashing the controller with 7.5? Maybe it was just "one of those things". Just throwing that out there. Thanks and continue the excellent work!