GMC 2003 C4C042 Owner's Manual page 254

Using the Tow Hooks (Option)
If your vehicle is equipped with tow hooks, the hooks
are provided at the front of your vehicle. You may need
to use them if you're stuck off
pulled to some place where you can continue driving.
-
road and need to be
CAUTION:
These hooks, when used, are under a lot of force.
Always pull the vehicle straight out. Never pull
on the hooks at a sideways angle. The hooks
could break off and you or others could be
injured from the chain or cable snapping back.
NOTICE:
Never use the tow hooks to tow the vehicle. Your
vehicle could be damaged and it would not be
covered by warranty.
5-29