Pontiac Montana SV6 2008 Owner's Manual page 179

The access panel for the passenger compartment air
filter is located in the back of the glove box. To replace
the filter, do the following:
1. Pull the tab located on the outer access panel up
and out.
2. Then push the tab, located on the left of the inner
access panel, to the right.
3. The first air filter will pull straight out. To remove
the second, reach in and slide it toward the
opening. Pull the second filter out.
4. Replace the filters by reversing Step 3. Make sure
the filters are inserted so that the sealing foam is
angled in the same direction on both filters. For the
type of filter to use, see Normal Maintenance
Replacement Parts on page 6-14.
5. Close the inner access door, while squeezing the
tab. Be sure it is tightly closed.
6. Snap the outer access panel into the back of the
glove box.
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