Buick 1994 LeSabre Owner's Manual page 103

The mirror mount is designed to detach during air bag
deployment. Excessive force and/or excessive up, down,
side-to-side adjustment can cause the mirror to detach
from the windshield. If this occurs, re-install the mirror
according to this procedure.
1.
2.
3.
4.
Center the bottom of the mirror mount against the
windshield at the top of the button.
Slide the mount onto the button keeping the mount
parallel to the windshield.
While pushing the mount against the button,
maintain a downward force until the support clicks
onto the button. A click indicates the mount is fully
engaged, it requires approximately 20 pounds of
force.
Check to make sure the mirror is securely attached to
the button by adjusting the mirror normally.
Outside Mirrors
Manual
To adjust the left outside
mirror, rotate the knob
located on the driver's door.
The right outside mirror
must be adjusted manually.
Adjust each mirror so you can just see the side of your
vehicle and the area behind your vehicle.
101