GMC 2011 Sierra Owner's Manual page 302

If you think you will need some
more ground clearance at the front
of your vehicle, you can remove the
front fascia lower air dam. The air
dam is held in place by 2 bolts
and 10 snaps accessible from
underneath the front fascia.
To remove the air dam:
1. Remove the 2 outboard air dam
bolts.
2. With a flat blade tool, disengage
the snaps.
3. After the bolts are removed and
the snaps are disengaged, push
forward on the air dam until it
is free.
After off-roading, be sure to reinstall
the air dam:
1. Line up the snaps and push the
air dam rearward to engage the
snaps.
2. Install the 2 outboard bolts.
Cargo on the load floor piled
higher than the seatbacks
can be thrown forward during
a sudden stop. You or your
passengers could be injured.
Keep cargo below the top of
the seatbacks.
Unsecured cargo on the
load floor can be tossed
about when driving over
rough terrain. You or your
passengers can be struck
by flying objects. Secure the
cargo properly.
(Continued)