I just fixed my wife's 2009 Vibe following these instructions. I bought knob GM# 19204643 from my Pontiac dealer. Cost 6.95. Instructions are good. I would add a couple of hints. 1) the 12 screws on the back plate are six sided. I thank it takes a 3mm socket (most sets only go to 4mm) I used pliers ...

GM now has a replacement knob. Just got it from where I bought car. Cost 6.95. Have not replaced yet; just found this site. Dealership want 106.00 for labor to replace.