Clunky front? This one had all the characteristics of a bad wheel bearing. Once the wheel was removed, a quick wiggle check revealed a control arm that was quite sloppy. Luckily I had already purchased a control arm bushing in hopes of finding a polyurethane replacement.
While I might not explain the process of replacement, I will say despite Chevy techs statement otherwise, you do not need to replace the entire control arm. The pictures can tell the tale from here.