Do these bolt straight to my factory headlight location?

Yes. These mount at factory rocker points with no drilling or bracket work. Align and bolt down using your existing hardware.

Does the switchback feature work without a separate controller?

Correct. The switchback LED runs white for low/high beam and automatically transitions to amber for turn signal function. No additional module or relay required.

What's the return window if these don't fit my truck?

Contact ModSupply directly for return eligibility and timeline. Headlight assemblies typically have a restocking consideration due to condition upon arrival, so test-fit before finalizing installation.