GMC 2003 C4C042 Owner's Manual page 225

If you put things inside your vehicle
tools, packages or anything else
the vehicle goes. If you have to stop or turn quickly, or
if there is a crash, they'll keep going.
CAUTION:
Things you put inside your vehicle can strike
and injure people in a sudden stop or turn, or in
a crash.
D
Put things in the cargo area of your vehicle.
Try to spread the weight evenly.
D
Never stack heavier things, like suitcases,
inside the vehicle so that some of them are
above the tops of the seats.
D
Don't leave an unsecured child restraint in
your vehicle.
D
When you carry something inside the
vehicle, secure it whenever you can.
D
Don't leave a seat folded down unless you
need to.
4-32
--
like suitcases,
--
they will go as fast as
Power Take Off (PTO) Switch
-
(If Equipped)
Before using a PTO, refer to the manufacturer's or
installer's instructions.
If your vehicle is equipped
for the addition of a PTO,
this factory installed switch
will be located in the
instrument panel
switchbank.