our windows do the samething in our car too, sometimes one will work, and sometimes they all work.
if i hold down the button on the door that is doing it, and slam the door while holding the button down the window will all of a sudden start to go down. they will work fine for a while.
i'm not real sure what is the problem, but it seems like gp windows were problematic from the factory anyways.
the left rear did it so i took the door panel off to check on it, unplugged it, and plugged it back in and worked fine. later it quit again. that regulator broke, so i got one from ed and it does the samething. not really sure what the problem is.
if you figure it out, let me know
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charlie
black 98 gtp sedan, 222,000 and running great with the new used tranny!
zzp 3" d/p aluminized
dhp 1.0