My girl really likes her 2002 TrailBlazer, except for one thing. The driver's seat back feels like it bows out, where her back hits it, and does not bow in/concave enough. I have tried every adjustment I can think or for the lumbar but am having no success. Does anyone have any recommendations for this problem. This is a bone stock TB with cloth grey interior. This is so basic a TB, it does not even come with or support key fobs.