Here's a link for the DrawTite hitch. There is a note on the left side of the page telling you where/how to trim the fascia on the SS models. Many bike racks have 2" draw bars, but you can get a reducer for the class 1 1/4" receiver hitches.

http://www.draw-tite.net/pdf/N24756.pdf

 

a reducer will cut your tounge weight in half too. also only go for a 2 bike rack if you go the reducer way. the class 1 hitch is usually only rated for a 2 bike rack.

i recommend this rack on the hhr. i have pics of it on mine if you need them too. inexpensive compared to most and works fantastic.

http://www.etrailer.com/pc-br2b~S64670.htm

 

here is that bike rack on mine, Great rack!