Fact is this, they both have the same issues, wether the operation/part is exactly the same. All windows are just that windows, they all work in the same way, unless the GT one happens to do a somersault in the door while its down but as far as I am aware it does not. Silconing ANY window from any car will have the same effect, checking the motor in ANY window is common sense, all I'm looking for is some pointers, not so hard to grab that is it. The -1 was for suggesting it can only be one of 2 things which is clearly not the case, even on the GT.
Did you even read my last post?
Have you ever seen a GT window - in particular the rubber section at the front near the wing mirror?
If you did - and if you have - then you'll see that;
1. I told you to carry on reading GT threads in search of your problem, there are no issues with that - indeed you may stumble across a solution but if you're going to reply on a thread relating to a GT then at least have the decency to mention that the problems you are experiencing and have tried to fix are on a different car.
2. The windows of a GT and a 147 are not the same (as I keep trying to tell you). The GT windows are frameless so have a rubber seal running around the bodywork of the car rather than runners that 147 windows (and the majority of other cars on the road) use to guide their way up. Maybe you should go and find an answer to your problem on a Vauxhall forum, because their cars have windows and motors and switches and runners and glass.
Please don't give me all the "that's not so hard to grasp now is it" patronising tone - you won't do yourself any favours acting like that on AO.
Best of luck in finding a solution to your problem.