well my 2010 hhr does have stabilitrak i found out the othe day when i came around a snowpacked curve i started to go into a sideways slide and the stabilitrak came on and straightned me out and kept me going on around the curve in my lane with out it iam sure i would have been in the ditch .

 

I found the SS feels better in competition mode in the snow, traction and acceleration feel much better. With the TC on it's too sensitive when pulling out.