Roughneck - Is the vehicle you are speaking of a 2009 4.8L? I just flashed it with the suggestions from those that made suggestions, along with some ideas of mine. Nothing changed the performance of the truck. It still will not spin the tires from a stop, with or without TCS on and AC off. I'm going to forward your suggestions to TC and see what he can come up with. Thanks for your input, everyone's input is appreciated.
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