The blank piece is held in by a screw and snaps in place. The new fog light piece will snap in and be held in with the same screw you removed so keep that screw (1 per side). It is painted under that piece you are referring too.
Awesome Thank you for the info
! Amazing how cool Forums are, because i asked this same question at a dealership or parts department and they all just scramble trying to find the answer and have the most puzzling confused look on their face
3more question's if anyone can answer,
-Anyone have pictures of the total parts needed?
-Is the Trim piece (part # 20847185) the black backpart and the chrome lines, is this a all in one piece?
-When you purchase the Lamp (part #10335108) , does that come with the chrome round piece that covers the projector lens, or is the chrome round trim piece separate?
Also, seems like gmpartsdirect.com is cheaper than the oemparts123, now i am not sure if shipping or if one site has better incentives than the other, but so far the gm parts direct one is cheaper, here is what i found so far.
Lamp (Part# 10335108)
List Price: 115.45each
Shown on OEMparts123 site: $81.74ea
Shown on GmpartsDirect: $71.35ea
Part # 20847185
Shown OEMparts123 site: $33.75ea
Shown on GmpartsDirect:$29.46ea
List Price: $36.66
Shown on OEMparts123: $21.63 ea
Shown on GMparts Direct: $18.88 ea