Hey guys my lower control arm on the front of my car is worn out really bad at the bushings. I have two questions. 1. Can I replace just the bushing or do I have to do the whole assembly and 2. Can someone give me the step by step on howto replace them. Thanks in advance

If the arm is bad, I would think replacing just the bushings might only adress some of the issues. Moog makes a replacement control arm for the Bonneville, that they claim adressess all concerns:

R-Series
Moog R-Series control arms combine quality design and construction with pricing that will appeal to budget-minded vehicle owners. When applicable, the control arms include all the hardware (pinch bolts, frame-mounting hardware, strut hardware, bushings and more) needed to provide complete service for replacements.

what other issues could there be other than the bushings or ball joint? and does your answer mean i cant buy just the bushing?

tie rods and upper strut mounts are the other things that can make your car feel loose, but you really didnt say what was wrong with your car

the lower control arm bushing is worn out