Do these use the factory fog light holes on my Escalade?

Yes, they mount at factory rocker points — no drilling or cutting required. Direct bolt-in fit.

Does the switch require any wiring beyond basic power and ground?

The switch handles your on/off control, but you'll need to run power and ground from your battery or fuse box to complete the circuit. Wiring diagram not confirmed with this kit — consult your vehicle's service manual or a professional installer if you're unsure on routing.

Can I install this myself with basic hand tools?

The fog lights bolt to factory points with standard hardware. The switch mounts in your dash and requires drilling one hole if no opening exists. Wiring is the main variable — if you're comfortable with automotive electrical basics, you can handle it. Otherwise, have an installer run the harness.