Do I need to remove the whole mirror assembly to install this?

This lens mounts into your existing factory mirror housing. You'll need to disassemble the mirror cover and bracket to access the mounting points, but the main assembly stays on the truck.

Will this work with my heated mirror setup?

If your truck has heated mirrors, the heating element is in the assembly itself, not the glass. This lens fits the same way whether your mirror is heated or not.

What if the lens doesn't seat flush after I install it?

Test the fit before fully securing—minor adjustment to the mounting clips or bracket may be needed. If it won't align with the factory points, do not force it; contact support with photos of your assembly.