Cadillac SRX Owner's Manual page 356

Use the floor mat with the
correct side up. Do not turn
it over.
Do not place anything on top of
the driver side floor mat.
Use only a single floor mat on
the driver side.
Do not place one floor mat on
top of another.
The driver side floor mat is held in
place by two button-type retainers.
The passenger side floor mat is held
in place by one button-type retainer.
1. Pull up on the rear of the floor
mat to unlock each retainer and
remove.
2. Reinstall by lining up the floor
mat retainer openings over the
carpet retainers and snapping
into position.
3. Make sure the floor mat is
properly secured and verify that
it does not interfere with the
pedals.