I have a 01 4.3L auto s10 blazer. I have tuned it with efi live problem i have been having is getting the TCC to unlock. When you hit a hill the TCC will not unlock and it starts to drag down the motor and will not unlock until the truck downshifts to 3rd. Then as soon as it up shifts it will lock right back up. Anyone ran into this? Its killing my fuel milage as i live in a hilly area and going up hills its constantly down and upshifting. If only i can get the TCC to unlock when i hit a hill and get down on the gas some without it having to drop down to 3rd.