GMC Yukon XL Denali 2005 Owner's Manual page 86

Passenger Airbag Status Indicator – United States
Passenger Airbag Status Indicator – Canada
The passenger sensing system will turn off the right
front passenger's frontal airbag under certain conditions.
The driver's airbag and the side airbags are not part
of the passenger sensing system.
1-80
The passenger sensing system works with sensors that
are part of the right front passenger's seat and safety
belt. The sensors are designed to detect the presence of
a properly-seated occupant and determine if the
passenger's frontal airbag should be enabled (may
inflate) or not.
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat.
General Motors recommends that child restraints
be secured in a rear seat, including an infant riding in a
rear-facing infant seat, a child riding in a forward-facing
child seat and an older child riding in a booster seat.
Your vehicle has a rear seat that will accommodate
a rear-facing child restraint. A label on your sun visor
says, "Never put a rear-facing child seat in the
front." This is because the risk to the rear-facing child is
so great, if the airbag deploys.