Should be picking the car up today, shop said the tcc oscillation, the rpm jumping up and down, was a computer problem on these 97 to 01 models. That it caused the convertor to pulsate in and out of lockup really fast, eventually leading to premature wear. He said the GM service manuals say that there are a couple things they can do, but the ultimate solution is to reset the computer. He said doing this usually works for about a year, then has to be redone. Anyone got any comment on this?