It just worked in my 09 HHR. But the installation in this machine is PITA. Jack up the front left side, remove the wheel, remove the fender, buy, make or find a tool thin and long enough to remove the belt tensioner, remove the old belt. While holding the tensioner in the loosened position, somehow thread the new belt in there. Connect in reverse order. I hope I never have to replace the water pump on this machine!