99 Chevy Tahoe 5.7 vortec LT4 hotcam kit ,, 411 ecm,. Pcm swap ,,, built 4L60e with ( non lockup 2500 stall converter) question is , is there a need to delete tcc codes when flashing are prior to flashing the pcm I don't think it will matter if they are done way with . Kinda curious is all...