GMC Sierra 2011 Owner's Manual page 80

3-16 Seats and Restraints
Q: What is wrong with this?
A: The shoulder belt is too loose.
It will not give as much
protection this way.
WARNING
You can be seriously hurt if your
shoulder belt is too loose. In a
crash, you would move forward
too much, which could increase
injury. The shoulder belt should fit
snugly against your body.
I n f o r ma t i o n P r o v i d e d b y :
Q: What is wrong with this?
A: The lap belt is too loose. It will
not give nearly as much
protection this way.