Product review (5 stars): No Brainer - Get This Kit!
This is the kit you want.  There are enough pieces to fix both the refrigerator door and the freezer door.  The kit comes with 2 x 2182179 Door Cams, 2 x 2182132 Door Closers, and 2 x other (unlabeled) Door Closers, plus a couple of shims and a bunch of screws. The only difference between the two sets of Door Closers is that the hole for the screw is slightly larger on one of them.  All are genuine Whirlpool parts.  It is very likely this kit will work with your Whirlpool or Kenmore, side-by-side refrigerator.  It worked with my Whirlpool GD2SHGXLT00 from 07/2002.  If you try to purchase any of the contained pieces separately, each piece will cost you ~$7, and you're going to need at least two pieces.  There is really no way for the Door Cam to wear down without the Door Closer also wearing.  $14 for two pieces or $10 for the entire kit - no brainer.