Join Date: Sep 1999
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Re: 89 Burban Slow Power Windows
Can't comment on the wiring, but I just replaced the motor in the drivers side door on my '86 K10, and it made a huge difference. The window worked before I put new weather stripping in, but it was slow. Once I put the new weatherstrip in, it would only go about half way up. I pulled out the old motor and regulator, replaced the motor, and cleaned and greased the rails, and now it works great.
I'm goign to redo the passenger side as well, just haven't gotten around to it yet.