Will this mount using my truck's existing fastener holes?

Yes. This cover uses factory mounting points—no drilling or frame modifications needed. Align it with your existing holes and secure with the hardware your OEM cover originally used.

Does the chrome finish come ready to install or does it need prep?

The chrome finish ships ready to bolt on. No sanding, priming, or painting required. Inspect for any transport damage before mounting, then install directly.

Is this a full bumper replacement or just a cover panel?

This is the cover panel only—the visible chrome piece on the rear bumper. If your underlying bumper structure is damaged, you'll need to address that separately.