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A chime will sound and the safety belt
light ( ) will be illuminated and flash
for several seconds when the ignition
key is turned to Run or Start, or at
any time the vehicle is running, and the
driver’s safety belt is not buckled.
If your vehicle is equipped with the
Passenger Sensing System, the chime
will sound and a message will be dis-
played on the Driver Information Center
for several seconds if the passenger’s
safety belt is not buckled under the
same conditions.
See Section 3 of your Owner Manual.
Getting to Know Your Sierra/Sierra Denali
4
Heated Front Seats (if equipped)
This feature allows you to heat the front
seatbacks and seat cushions simultane-
ously or just the seatbacks. The controls
are located on the driver and front pas-
senger door panels.
Select a heat setting for both the
seatback and seat cushion
• Press and release the horizontal
button (“A” above) until the indicator
light shows the desired setting.
Select a heat setting for the seatback
only
• Press and release the vertical button
(“B” above) until the indicator light
shows the desired setting.
See Section 1 of your Owner Manual.
Passenger Automatic Locking
Restraint (ALR)
Automatic Dimming Rearview
Mirror with OnStar
®
, Compass
and Temperature Display
(if equipped)
Controls for the dimming feature, as well
as OnStar
®
(if equipped) and the com-
pass and temperature displays, are
located on the bottom of the mirror.
Power Lumbar Front Seats
(if equipped)
A
B
Adjust lumbar
support
• Press the front
or rear of the
two-way lumbar
control located
on the side of
the seat cushion near the door.
Release at the preferred setting.
See Section 1 of your Owner Manual.
The safety belt is designed to lock dur-
ing an accident, but it will also lock if it is
pulled out all the way during initial buck-
ling, and you may be unaware that this
has happened. If the safety belt does
lock, unbuckle it and allow it to retract
fully; then pull it out and rebuckle the
belt.
See Section 1 of your Owner Manual.
Driver and Front Passenger
Safety Belt Reminder
(if equipped)