I'm sure there's one that fits perfectly with the correct ends and length but nothing listed for the HHR. I sometimes haul 5-600lbs of testing equipment and or pull a small trailer. I also like the option of the jacked up Hot Wheels look occasionally.

 

You HHR is a 1/4 ton truck. I have hauled around 800 lb for a long distance.
Should be the same part for Cobalt/G6 etc.

 

As mentioned in my comment in your other post, I understand PT Cruiser rear springs add some height.

If you find air shocks that work please, post!

 

Pretty sure they don't list one for that either.