I would have to agree on the amber when it is lit. My 03 had a Clear/Smooth Headlight Lens (faceted mirror), clear front turn signals and an amber side marker. I have a 3157NA Amber bulb in the turn signal, and the side marker has a clear bulb.
On the newer trucks 05-07 both the Front Turn and Front Side marker is clear, but both have an amber bulb. So when the light is on, they are yellow/amber.
I believe this is the "loophole" that is used for the rear stop/turn/tail that is clear with the silver reflector showing. They have a red bulb so that when the bulb is illuminated, it is a red light.....
On the newer trucks 05-07 both the Front Turn and Front Side marker is clear, but both have an amber bulb. So when the light is on, they are yellow/amber.
I believe this is the "loophole" that is used for the rear stop/turn/tail that is clear with the silver reflector showing. They have a red bulb so that when the bulb is illuminated, it is a red light.....