Clunk noise in my 2007 Chevrolet HHR or Pontiac G6
23,00 miles.
I have a clunk noise in the front end of my HHR. It happens when i am  turning the  
wheel, and also when going over bumps in the road. Most of the time it is when going  
over a set of rail road tracks. I had the steering and struts checked at a local shop, but  
they said they did not see anything. Is there a common problem with these cars?
Common cause of of clunk noise in the front end of my 2007, 2008, 2009 Chevrolet HHR when going over bumps or turning while driving. This also may be the problem for the Cobalt, Pontiac G6 and similar models.
By what you are describing, this sounds like a common problem on the HHR, Cobalt,  Pontiac G6
and other models 2008 and 2009, with a 'Front stabilizer bar link / arm'. There is one on  each
wheel. It connects the lower control arm to the  front stabilizer bar. The bar helps  control body roll
when turning. There is a ball socket  joint on the top and bottom of the  arm. (See pic below).  
With the year and mileage, this noise condition would be under the factory warranty,  even if this is
not  the problem.
Clunk in Chevy HHR and Pontiac  G6