Will this cap work on both my bed style options?

Yes. This single cap is engineered to fit both Fleetside and Styleside beds for your model year, so you don't need to pick between them. Mount it at the factory attachment points on your tailgate.

Do I need to prep or paint this before installing?

The cap ships ready to install as-is. If you want to match your truck's paint, light prep with standard automotive sandpaper followed by primer and topcoat will give you the best finish. Test-fit first to confirm your mounting approach before committing to any prep work.

What fasteners do I need to mount it?

Mounting hardware is not included with this cap. You'll secure it at the factory tailgate attachment points—verify your truck's service manual for the correct fastener size and torque specs to avoid over-tightening or stripping threads.