Does this switch work with the existing steering column wiring, or do I need to run new harness?

The switch mounts in the factory location and uses existing OEM wiring points. You may need to tap into available circuits depending on your electrical setup — consult your vehicle's wiring diagram or an experienced installer to confirm compatibility with your specific car's configuration.

Will these fog lights fit if my Cruze has the factory bumper opening, or does it require modification?

These mount at factory rocker points designed into the OEM bumper fascia. No drilling or cutting required if your car has the standard fog light cavity — verify your bumper trim level before ordering, as some variants may have blanks instead of open housings.

Are the lenses sealed against moisture, or should I apply sealant around the bezel before install?

The chrome bezel is designed to seal the lens opening. Before final assembly, inspect the gasket or seal on the back of the housing — apply a light bead of weatherproof sealant around any gaps between the bezel and bumper to prevent water pooling.