I was very pleased upon first examination of the unit. Unfortunately I was less thrilled when I got into the installation. I specifically searched for extended cab parts, but this unit is not sized for the extended cab. I've got no clue what possessed GM to make a different part between the standard and extended cabs, but if you've got the extended cab for the S10, this is the wrong part. You can make it work, (I did) but the spacing of the screw mounting posts is just a bit off.