Questions and Answers

LaSabre Windows Q. Hello, I am writing to ask you a question. I have a 1987 Buick LaSabre and my front left window will start to shake and not move after I take it down half way. I was wondering if this could be the motor or if it could have anything to do with the battery.

If it does have something to do with the motor, is there anyway I can fix it instead of buying a new one? If I have to buy a new one, how much do they run normally?

Thank you so much!
Tanya

A. Well Tanya, it could be the motor but it sounds more like the window is binding on the way down. This could be because the tracks are dirty or the window regulator needs lubrication, adjustment or replacement.

What I would try first is spray the window tracks with silicone and see if that takes care of the problem. I usually spray the top of the channel and let it run down and soak into the glass run. Then I work the window up and down, respray and just wipe off the excess.

If this doesn't take care of it, the problem is inside the door. There was a TSB issued in February of 1989 number 88-10-59 about this problem. I quote from the bulletin: Misadjusted glass is the number one cause of most customer comments. Front and rear guides not parallel to one another, can cause a bending moment force at the rear glass guide, which in turn causes the PIN GUIDE TO UNLATCH AND REAR OF GLASS TO BE UNATTACHED. Indicators are a rocking motion of glass during window travel, top edge of glass not parallel with door header and/or rear pin guide becoming visible from beneath rubber run channel.

I would think this is the most likely problem with your window. There is a repair kit for this and your dealer can order and install it for you if this is indeed the problem.

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