I fully agree with all comments listed here. All GM A bodies are principally the same when it comes to the back window problem. You have no clue to the extent of damage until you pull the glass out. You will be truly shocked, it will be rotten in the corners and the rot will run along the bottom of the track toward the center of the car. Be ready for this. You need to have some one who can weld and fabricate sheet metal. You will mostlikely have to fabricate the replacemnt metal. Make sure the person knows what he is doing. I have had to redue many.... half done sorry jobs and it is twice the work. If not done properly your glass will never seat correctly and you will always have leaks, plus it will not look correct which will kill the value of the vehicle. This is the first spot people look at before buying these vehicles. Do your homework, who ever you get try to see their work, that will tell it all. Post pic here and you can get help. This process is much more involved than you realize. It alawys goes from the package tray, (rear window), to the trunk, to the outer wheel well, to the quarter panel, to the trunk extension. Every one I have repaired involved all the above. It is expensive, tidious, and then there is the issue of paint. Most the time you cannot match the paint, so now if you want the car to maintain value, you are looking at an entire paint job. So take all that in concideration and plan your budget accordingly. Many people have been sadly disapointed in the end, just because they were not told all this, and they spent a fortune, and their car looks like crap and they are depressed and unhappy. The brite side is this issue can be repaired!