Chevrolet 2003 Blazer Owner's Manual page 245

4-44
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 recovery hooks to tow the
vehicle. Your vehicle could be damaged and it would
not
be covered by warranty.