chiviconquivi Posted May 24, 2007 Posted May 24, 2007 i guess what i am looking for is help doing the right modifications to my 04 GMC Sierra Z71, 5.3L. i have the hypertech Programmer III. any suggestions. More horsepower/ Torque. does not matter, just want suggestions
VortecMax Posted July 2, 2007 Posted July 2, 2007 i guess what i am looking for is help doing the right modifications to my 04 GMC Sierra Z71, 5.3L. i have the hypertech Programmer III. any suggestions. More horsepower/ Torque. does not matter, just want suggestions On my Hypertech I increaed all shift points to the max, dialed the tire size in, increased to 93 octane , and increased shift firmness. WOW what a differance. you may use more fuel cause of all the fun yu'll have laying the pedal into it!
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