Chevy HHR. 2.4 litre.Question: is it hard to replace the lower control arm bushings.
Answer: Replacing the lower control arm bushings is not that hard at all. You need to get the car up on jack stands or a lift and remove the front wheels.
Answer: The ball joint, rear mount bolt and two front mount bolts need to be removed and then you can swing the control arm out of it's mounting brackets. You'll need an air hammer or a press to remove the old bushing, even if the rubber falls right out, the steel ring will need to be pressed or hammered out. The best way to install a new bushing is by using a press. You may not have access to one and have to find some other way to get it installed, but be careful and make sure to keep it centered. After that, reinstall the control arm and repeat for the other side. See some great pictures here.