Cadillac 2012 CTS-V Owner's Manual page 444

If a floor mat is the wrong size or
is not properly installed, it can
interfere with the pedals.
Interference with the pedals can
cause unintended acceleration
and/or increased stopping
distance which can cause a crash
and injury. Make sure the floor
mat does not interfere with the
pedals.
Use the following guidelines for
proper floor mat usage.
The original equipment floor
mats were designed for your
vehicle. If the floor mats need
replacing, it is recommended
that GM certified floor mats be
purchased. Non-GM floor mats
may not fit properly and may
interfere with the pedals.
Always check that the floor mats
do not interfere with the pedals.
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's side.
Do not place one floor mat on
top of another.
The driver side floor mat is held in
place by a button-type retainer.
1. Pull up on the rear of the floor
mat to unlock the retainer and
remove.
2. Reinstall by lining up the floor
mat retainer opening over the
carpet retainer and snap into
position.
3. Make sure the floor mat is
properly secured in place.