How much you think I'm lookn at to get the stage 2/3 package through GM in order to not void my warranty? What comes in the package(s)?

 

The money it cost for GM stage kit is not worth the gains i think. It can be spent elsewhere for less to get the same or more power. Also nothing "voids" your warranty unless they can prove thats the cause of the problem. Id save your money and get a ZZP or OTTP stage kit and use the money you saved and get a H/E or something.