i have a 2003 gmc sierra 1500 with the 5.3L engine, i have a cold air intake, throttle boddie spacer, superchip cortex, and a highly modded transmission......i dont have the power off the line i am looking for and that is what i am here for i am wanting to know what gear ratio i should put in my rear end to make it "get up and go" i guess you could say......and what else could i do to it to make great performance gains other than forced air induction and breaking into my engine???

thanks for the help and time, brandon