GMC 2003 Yukon Owner's Manual page 74

If your child restraint does not have the LATCH system,
you'll be using the lap-shoulder belt to secure the
child restraint in this position. Be sure to follow the
instructions that came with the child restraint. Secure the
child in the child restraint when and as the instructions
say.
1. Because your vehicle has a right front passenger
air bag, always move the seat as far back as it will
go before securing a forward-facing child restraint.
See Power Seats on page 1-4 or Manual Seats
on page 1-3 .
If your vehicle has the passenger sensing system
and you are using a rear-facing child restraint in this
seat, make sure the frontal air bag is off. See
Passenger Sensing System on page 1-81 .
When the passenger sensing system has turned off
the right front passenger's frontal air bag, the off
indicator on the inside rearview mirror will light and
stay lit when you turn the ignition to RUN or START.
2. Put the restraint on the seat.
3. Pick up the latch plate, and run the lap and shoulder
portions of the vehicle's safety belt through or
around the restraint. The child restraint instructions
will show you how.
1-68
4. Buckle the belt. Make sure the release button is
positioned so you would be able to unbuckle the
safety belt quickly if you ever had to.