key GMC SIERRA 2007 Owner's Guide

Active Fuel Management™
Your vehicle’s V8 engine may have Active Fuel
Management™. This system allows the engine to
operate on either all or half of its cylinders,
depending on the driving conditions.
When less power is required, such as cruising at a
constant vehicle speed, the system will operate
in the half cylinder mode, allowing your vehicle to
achieve better fuel economy. When greater
power demands are required, such as accelerating
from a stop, passing, or merging onto a freeway,
the system will maintain full-cylinder operation.
Your vehicle has an Active Fuel Management™
indicator. For more information on using this
display seeDIC Operation and Displays (With DIC
Buttons) on page 268orDIC Operation and
Displays (Without DIC Buttons) on page 275.
Automatic Transmission Operation
If your vehicle is has an automatic transmission,
it has an electronic shift position indicator
within the instrument panel cluster. This display
comes on when the ignition key is turned to
the RUN position.There are several different positions for the
shift lever.
See “Range Selection Mode” later in this section.
PARK (P):This position locks your rear wheels. It
is the best position to use when you start the engine
because your vehicle cannot move easily.
Hydra-Matic®4-Speed Automatic Transmission
Allison Transmission®or Hydra-Matic®6-Speed
Automatic Transmission
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This shift stabilization feature is designed to
determine, before making an upshift, if the engine
is able to maintain vehicle speed by analyzing
things such as vehicle speed, throttle position, and
vehicle load. If the shift stabilization feature
determines that a current vehicle speed cannot be
maintained, the transmission does not upshift
and instead holds the current gear. In some cases,
this could appear to be a delayed shift, however
the transmission is operating normally.
Your vehicle’s transmission uses adaptive shift
controls. Adaptive shift controls continually
compares key shift parameters to pre-programmed
ideal shifts stored in the transmissions computer.
The transmission constantly makes adjustments to
improve vehicle performance according to how the
vehicle is being used, such as with a heavy load or
when temperature changes. During this adaptive
shift control process, shifting might feel different as
the transmission determines the best settings.When temperatures are very cold, the Allison
Transmission®and Hydra-Matic®6-Speed
transmission’s gear shifting could be delayed
providing more stable shifts until the engine warms
up. Shifts could be more noticeable with a cold
transmission. This difference in shifting is normal.
MANUAL MODE (M):This position, is available
on vehicles with the Allison Transmission
®or
Hydra-Matic®6-Speed transmission. It lets drivers
select the range of gears appropriate for current
driving conditions. If your vehicle has this feature,
see Range Select Mode (Allison Transmission
®
or Hydra-Matic®6-Speed transmission) later in
this section.
THIRD (3):This position is also used for normal
driving. It reduces vehicle speed more than
DRIVE (D) without using the brakes. You might
choose THIRD (3) instead of DRIVE (D) when
driving on hilly, winding roads, when towing
a trailer, so there is less shifting between gears
and when going down a steep hill.
141

Shifting Into Park (P)
{CAUTION:
It can be dangerous to get out of your
vehicle if the shift lever is not fully in
PARK (P) with the parking brake rmly set.
Your vehicle can roll. If you have left the
engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle will not move, even
when you are on fairly level ground, use
the steps that follow. With four-wheel drive,
if your transfer case is in NEUTRAL, your
vehicle will be free to roll, even if your shift
CAUTION: (Continued)
CAUTION: (Continued)
lever is in PARK (P). So, be sure the
transfer case is in a drive gear — not in
NEUTRAL. If you are pulling a trailer, see
Towing a Trailer on page 445.
1. Hold the brake pedal down with your right foot
and set the parking brake.
2. Move the shift lever into the PARK (P)
position by pulling the shift lever toward
you and moving it up as far as it will go.
3. Be sure the transfer case is in a drive
gear — not in NEUTRAL (N).
4. Turn the ignition key to LOCK.
5. Remove the key and take it with you. If you
can leave your vehicle with the ignition key in
your hand, your vehicle is in PARK (P).
163

OnStar®System
OnStar®uses several innovative technologies and
live advisors to provide you with a wide range
of safety, security, information, and convenience
services. If your airbags deploy, the system is
designed to make an automatic call to OnStar
®
Emergency advisors who can request emergency
services be sent to your location. If you lock
your keys in the vehicle, call OnStar
®at
1-888-4-ONSTAR and they can send a signal to
unlock your doors. If you need roadside
assistance, press the OnStar
®button and they
can contact Roadside Service for you.
OnStar
®service is provided to you subject to the
OnStar®Terms and Conditions. You may
cancel your OnStar®service at any time by
contacting OnStar®as provided below. A completeOnStar
®Owners Guide and the OnStar®Terms
and Conditions are included in the vehicle’s
OnStar
®Subscriber glove box literature. For more
information, visit onstar.com or onstar.ca,
contact OnStar
®at 1-888-4-ONSTAR
(1-888-466-7827) or TTY 1-877-248-2080, or
press the OnStar
®button to speak with an
OnStar®advisor 24 hours a day, 7 days a week.
Not all OnStar
®features are available on all
vehicles. To check if your vehicle is equipped to
provide the services described below, or for a
full description of OnStar
®services and system
limitations, see the OnStar®Owner’s Guide in your
glove box or visit onstar.com.
OnStar®Services
For new vehicles with OnStar®, the Safe & Sound
Plan, or the Directions & Connections®Plan is
included for one year from the date of purchase.
You can extend this plan beyond the rst year,
or upgrade to the Directions & Connections
®Plan.
For more information, press the OnStar®button
to speak with an advisor. Some OnStar®services
(such as Remote Door Unlock or Stolen Vehicle
Location Assistance) may not be available
until you register with OnStar
®.
180

Instrument Panel Storage Area
Your vehicle may have an instrument panel
storage area. It is located above the glove box.
To open, press and hold the driver’s side of the
handle in and pull out on the exposed portion
of the handle.
Center Console Storage Area
Your vehicle may have an upper and lower center
console storage area with cupholders.
To access the upper storage area, pull lever (A) up.
To access the lower storage area, raise the upper
storage bin, then pull lever (B) up. Use the key to
lock and unlock the lower storage area.
197

Hazard Warning Flashers
The hazard warning ashers warn others.
They also let police know you have a problem.
Your front and rear turn signal lamps will ash
on and off.
The hazard warning
asher button is
located on top of the
steering column.
The hazard warning ashers work no matter what
ignition position the key is in, and even if the
key is not in the ignition.
Press the button to make the front and rear turn
signal lamps ash on and off. Press the button
again to turn the ashers off.
When the hazard warning ashers are on, your
turn signals will not work.
Other Warning Devices
If you carry reective triangles, you can set them up
at the side of the road about 300 feet (100 m)
behind your vehicle.
Horn
To sound the horn, press the horn symbols
located on the steering wheel.
211

To idle your vehicle with the automatic headlamp
system off, turn the control to the off position.
You may be able to turn off your Automatic
Headlamp System. SeeDaytime Running Lamps
(DRL) on page 222for more information.
Your headlamps will also stay on after you exit the
vehicle. You can program this feature using the
Driver Information Center (DIC). SeeDIC Vehicle
Customization (With DIC Buttons) on page 289.
As with any vehicle, you should turn on the regular
headlamp system when needed.
Puddle Lamps
Your vehicle may have puddle lamps, that come
on when it is dark outside to help you see the area
near the base of the front doors. The puddle
lamps will come on when a door is opened, or
when you press the unlock button on the Remote
Keyless Entry Transmitter. The lamps will time
out or turn off once the engine is started.
Fog Lamps
-(Fog Lamps):If your vehicle has fog lamps,
the button is located on the instrument panel
to the left of the steering column and below the
dome lamp override button.
The ignition must be in RUN and the parking
lamps must be on for the fog lamps to work.
To turn the fog lamps on, press the fog lamps
button. A light comes on in the instrument
panel cluster to let you know that the fog lamps
are on. Press the button again to turn the fog
lamps off.
When the fog lamps are turned on, the low-beam
headlamps automatically turn on.
The fog lamps turn off while you change to
high-beam headlamps. When the high-beam
headlamps go off, the fog lamps will come
on again.
Fog lamps should only be used in foggy conditions
since they could be distracting to oncoming
drivers in clear weather conditions.
Some localities have laws that require the
headlamps to be on along with the fog lamps.
224

Dome Lamps
The dome lamps come on when a door is opened.
The dome lamps can also be turned on by
turning the knob, located next to the exterior lamps
control, clockwise to the farthest position. In this
position, the dome lamps will remain on whether a
door is opened or closed.
Dome Lamp Override
E(Dome Lamp Override):You can use the
dome lamp override button, located next to
the exterior lamps control, to set the dome lamps
to come on automatically when a door is
opened, or to remain off. To turn the lamps off,
press the button in. With the button in this position,
the dome lamps will remain off when the doors
are open. To return the lamps to automatic
operation, press the button again to return it to the
extended position. With the button in this
position, the dome lamps will come on when you
open a door.
Entry Lighting
Your vehicle has an illuminated entry feature.
When the doors are opened, the dome lamps will
come on if the dome override button is in the
extended position. If the dome override button is
pressed in, the lamps will not come on.
Exit Lighting
With exit lighting, the interior lamps will come on
when the key is removed from the ignition.
They will turn off automatically in 20 seconds. The
lights will not come on if the dome override
button is pressed in.
Reading Lamps
If your vehicle has reading lamps they are located
on the overhead console.
To turn on the reading lamps, press the button
located next to each lamp. To turn them off, press
the button again.
226

Safety Belt Reminder Light
When the key is turned to RUN or START, a
chime will sound for several seconds to remind
people to buckle their safety belts. The driver
safety belt light will also come on and stay on for
several seconds, then it will ash for several
more. You should buckle your seat belt.
This chime and light will
be repeated if the driver
remains unbuckled
and the vehicle
is in motion.
If the driver’s belt is buckled, neither the chime nor
the light will come on.
Passenger Safety Belt Reminder
Light (1500 Series)
Several seconds after the key is turned to RUN or
START, a chime will sound for several seconds
to remind the front passenger to buckle their safety
belt. The passenger safety belt light will also
come on and stay on for several seconds, then it
will ash for several more.
This chime and light will
be repeated if the
passenger remains
unbuckled and the
vehicle is in motion.
If the passenger’s safety belt is buckled, neither
the chime nor the light will come on.
SeePassenger Airbag Status Indicator on
page 252for more information.
249

Airbag Readiness Light
There is an airbag readiness light on the instrument
panel cluster, which shows the airbag symbol. The
system checks the airbag’s electrical system for
malfunctions. The light tells you if there is an
electrical problem. The system check includes the
airbag sensors, the airbag modules, the wiring and
the crash sensing and diagnostic module and, if
equipped, the passenger sensing system. For more
information on the airbag system, seeAirbag
System on page 83.
This light will come on
when you start your
vehicle, and it will ash
for a few seconds.
This means the system
is ready.
If the airbag readiness light stays on after the
vehicle is started or comes on while you are
driving, the airbag system may not be working
properly. Have your vehicle serviced right away.
Airbag Off Light
If your vehicle has an airbag on-off switch, it also
has a passenger airbag status indicator located
in the overhead console.
When the ignition key is turned to RUN or START,
the passenger airbag status indicator ON and
OFF, or the symbol for on and off, will light
for several seconds as a system check. Then,
after several more seconds, the status indicator
ON or OFF, or either the on or off symbol, will light
to let you know the status of the right front
passenger’s frontal airbag.
When you manually turn the right front passenger’s
airbag off using the airbag on-off switch in the
glove box, the indicator light OFF or the off symbol
will come on and stay on to remind you that the
airbag has been turned off.
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