Will these bolt directly to my truck without modification?

Yes. These mount at factory locations — no drilling needed. Line them up with the existing fog light openings and fasten with basic hand tools.

Does the switch wire into the stock electrical harness?

The switch is integrated into the assembly. You'll need to confirm how the harness connects to your truck's existing wiring — refer to your vehicle's service manual or contact our support team if you need wiring guidance.

Are the bulbs included, or do I need to source them separately?

Bulbs are not included with this assembly. Check your Colorado's service manual for the correct bulb type and wattage before installation.