LS3 manual only (SS), not the LLT AY-6 manual (LS, LT's). It's a fuel economy thing for manual v8 cars and has been used since the early to mid 90's for LT1/4 and LSX based motors in Camaros, Trans Ams, and Vettes.
In other words, if you have the v6, you don't have skip shift.
