So I know this issue has been beat to death with everyone and I know all the common causes. So here is what does work: I have A1 Electric replacement window motors with counter sprung regulators. Way faster that stock ones. Yes, this has always been an issue with this car. I tried to bypass the thermal resistor on my pass window motor and it made no difference I tried bypassing the electric system all together and ran the motor right off another battery. That helped a little, but it still stops a hair short. So now that we are passed all the electrical possibilities, I really think that there is something I'm missing adjustment wise. Seems I can only get the window to somewhat seal if I adjust it in the way that I have to roll it up first before closing the door. No matter what I try, the window goes up about 1/8"- 3/16" less if I roll it up with the door closed. If I adjust it so it pushes less on the weatherstripping and goes up with the door closed, then it is not pushing hard enough to seal. If I adjust the window backwards, then the front does not seal well. After YEARS I finally got the drivers side tolerable, however the passenger side is never right. Also, the weatherstrip is NOS replacement and it does seem more bloated than the factory stuff, even though it is OEM GM seals that I paid an arm and a leg for. This is also a T top car. Any help is appreciated. Thanks!