GE PVM9005 Owner's Manual page 27

Grooves in
Microwave for
Filter on Each Side
Bottom Tab
Filter (dashed to show
details of grooves)
To Install the Charcoal Filter
To install a new charcoal filter, remove plastic
and other outer wrapping from the new filter.
Insert the top of the filter up and into the grooves
on both sides of the inside of the top opening.
Once you have cleared the bottom tab, push
the bottom of the filter in until it rests in place
vertically behind the tab.
Close the charcoal filter cover at center of the
grille by pushing the "Push" area again.
How to install charcoal filter, here is video
instruction.
http://www.geappliances.com/videos/
microwave-troubleshooting-fix.htm
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27