[TransAm525]

I just went through the whole mirror glass replacement process on my 78 T/A. Like Shooby said, you need to disassemble the mirror. The glass is held in with silicon sealant. To remove the glass, use a small screwdriver and carefully pry the glass up. You will crack the glass in the process, but be carefull not to damage the plastic housing. To install the new glass, use GM Super Silicon Adhesive. DO NOT purchase the mirror glass from Classic Industries. Their mirror glass does not fit our bullet mirrors. Mine was the right size and shape, but did not fit the contour of the mirror housing. I purchased my mirror glass from an E-bay member (E-bay store call Mirrors and More). The mirror glass was identicle to the factory glass right down to the smooth edges.