GMC YUKON 2018 Owner's Manual page 118

7. Before placing a child in the
child restraint, make sure it is
securely held in place. To
check, grasp the child restraint
at the seat belt path and
attempt to move it side to side
and back and forth. When the
child restraint is properly
installed, there should be no
more than 2.5 cm (1 in) of
movement.
If the airbag is off, the off indicator in
the passenger airbag status
indicator will come on and stay on
when the vehicle is started.
If a child restraint has been installed
and the on indicator is lit, see If the
On Indicator Is Lit for a Child
Restraint under Passenger Sensing
System 0 91.
To remove the child restraint,
unbuckle the vehicle seat belt and
let it return to the stowed position.
Seats and Restraints 117