The drivers side front window on my Tracker tilted a little as it slid up. I fixed it myself by tightening up the phillips head screws (two of them) that holds the glass to the regulator. My passenger side front glass was a little tight, I tightened up the same screws and problem solved again. There isn't much to adjust or go out of adjustment back there (two phillips head screws) so don't be afraid to check things out your self if you are machanicly inclined.
NOTE; If still under warrenty do not tear the splash guard just incase you got to take it to the dealer. Put things back in the same order you removed them.
If you got screws or clips left over after assembly they are not spares! It means you forgot something

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