To remove your factory turn signal lens you will need to locate the release clip behind the larger,
top mirror of your 2008-2010 Ford Superduty. The clip is physically behind the mirror on the
horizontal edge, just adjacent to the lens.
1. Push the top, inside of the mirror so that there is a large gap by the bottom, outside
edge.
2. You should see the release clip now and you simply need to depress it using a flat
head screwdriver. This will release the light from the mirror.
3. Remove the bulb sockets from the factory lens and then remove the bulbs from the
sockets.
Dose this help.