It is the glass/mirror section that you adjust to see that is loose
Nov 23, 2011 at 2:54 AM
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RIVERMIKERAT
AUTOMOTIVE REPAIR CONTRIBUTOR
6,110 POSTS
My reference doesn't list the Holden. Most mirrors can be tightened with a screw in the front part of the mirror. Some mirrors require removal of the door panel to tighten. If you can upload a few pictures, I might be able to see where the adjustment/tightening screw is.