2006 GMC SIERRA brake light

4. Shift the transfer case to Two-Wheel High.
5. Simultaneously press and hold the Two-Wheel High
and Four-Wheel Low buttons for 10 seconds. The
red NEUTRAL light will come on when the transfer
case shift to NEUTRAL is complete.
6. Start the engine if it is not already running.
7. Press and hold the foot brake pedal and Shift the
transmission to REVERSE (R) for one second, then
shift the transmission for one second to DRIVE (D)
for an automatic transmission, or FIRST (1) for
vehicles equipped with a manual transmission and
then let out the clutch. This is to ensure the transfer
case is in NEUTRAL. If not, repeat this procedure
starting at Step 3.
8. Turn the engine off, by turning the key to
ACCESSORY.
9. Place the transmission shift lever in PARK (P)
for an automatic transmission, or FIRST (1) for
vehicles equipped with a manual transmission.
10. Turn the ignition to LOCK.Shifting Out of NEUTRAL
To shift out of NEUTRAL:
1. Set the parking brake and press and hold the
regular brake pedal.
2. Shift the transmission to NEUTRAL (N) for an
automatic transmission, or press the clutch pedal
for vehicles equipped with a manual transmission.
Then turn the ignition to RUN with the engine off.
3. Press the button for the desired transfer case shift
position (Two-Wheel High, Four-Wheel High, or
Four-Wheel Low).
4. After the transfer case has shifted out of NEUTRAL
the red light will go out.
5. Release the parking brake.
6. You may start the engine and shift the transmission
to the desired position. Excessively shifting the
transfer case into or out of the different modes may
cause the transfer case to enter the shift protection
mode. This will protect the transfer case from
possible damage and will only allow the transfer
case to respond to one shift per 10 seconds.
The transfer case may stay in this mode for up
to three minutes.
7. After the transfer case has shifted out of NEUTRAL
the red light will go out.
2-51

Parking Brake
To set the parking brake, hold the regular brake pedal
down with your right foot. Push down the parking brake
pedal with your left foot.
A chime will activate and the warning light will ash when
the parking brake is applied and the vehicle is moving at
least 3 mph (5 km/h) for at least three seconds.
To release the parking brake, hold the regular brake
pedal down. Pull the bottom edge of the lever, located
above the parking brake pedal, with the parking brake
symbol, to release the parking brake.If the ignition is on when the parking brake is released,
the brake system warning light will go off.
Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify that
the parking brake is fully released and the brake
warning light is off before driving.
If you are towing a trailer and are parking on any hill,
seeTowing a Trailer on page 4-67.
2-52

{CAUTION:
Four-wheel drive vehicles with the transfer
case in NEUTRAL will allow the vehicle to roll,
even if your automatic transmission shift lever
is in PARK (P). So, be sure the transfer case is
in a drive gear — not in NEUTRAL. Always set
your parking brake.
Follow the proper steps to be sure your vehicle
will not move. SeeShifting Into Park (P) (Automatic
Transmission) on page 2-53.
If you are pulling a trailer, seeTowing a Trailer on
page 4-67.
Mirrors
Manual Rearview Mirror
Pull or push the tab under the mirror to adjust it to the
night or daytime setting. In the nightime setting, the glare
from headlamps behind the vehicle will be less intense.
Automatic Dimming Rearview Mirror
with OnStar
®and Compass
Your vehicle may have an automatic-dimming rearview
mirror with a compass and the OnStar®system.
There are three additional buttons for the OnStar
®
system. See your dealer for more information on the
system and how to subscribe to OnStar®. SeeOnStar®
System on page 2-73for more information about the
services OnStar®provides.
Mirror Operation
When turned on, this mirror automatically dims to the
proper level to minimize glare from any headlamps
behind you after dark.
O(On/Off): This is the on/off button for the automatic
dimming feature and compass. Press the far left button,
located below the mirror face, for up to three seconds
to turn the feature on and off. A light on the mirror will
be lit while the feature is turned on.
2-59

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Tilt Wheel.....................................................3-6
Turn Signal/Multifunction Lever.........................3-7
Turn and Lane-Change Signals........................3-7
Headlamp High/Low-Beam Changer..................3-8
Flash-to-Pass.................................................3-9
Windshield Wipers..........................................3-9
Windshield Washer.......................................3-10
Cruise Control..............................................3-10
Headlamps..................................................3-14
Headlamps on Reminder................................3-14
Daytime Running Lamps (DRL).......................3-15
Automatic Headlamp System..........................3-15
Fog Lamps..................................................3-17
Auxiliary Roof Mounted Lamp.........................3-18
Instrument Panel Brightness...........................3-18
Dome Lamps...............................................3-18
Dome Lamp Override....................................3-19
Entry Lighting...............................................3-19
Exit Lighting.................................................3-19
Front Reading Lamps....................................3-19
Cargo Lamp.................................................3-19
Accessory Power Outlet(s).............................3-20
Ashtray(s) and Cigarette Lighter......................3-20Climate Controls............................................3-21
Climate Control System.................................3-21
Dual Climate Control System..........................3-22
Dual Automatic Climate Control System...........3-25
Outlet Adjustment.........................................3-30
Warning Lights, Gages, and Indicators............3-31
Instrument Panel Cluster................................3-32
Speedometer and Odometer...........................3-33
Trip Odometer..............................................3-33
Tachometer.................................................3-34
Safety Belt Reminder Light.............................3-34
Airbag Readiness Light..................................3-35
Airbag Off Light............................................3-35
Passenger Airbag Status Indicator...................3-37
Battery Warning Light....................................3-40
Voltmeter Gage............................................3-40
Up-Shift Light (Manual Transmission)...............3-41
Brake System Warning Light..........................3-41
Anti-Lock Brake System Warning Light...............3-42
Traction Off Light..........................................3-43
Engine Coolant Temperature Gage..................3-43
Transmission Temperature Gage.....................3-44
Malfunction Indicator Lamp.............................3-46
Oil Pressure Gage........................................3-48
Security Light...............................................3-49
Cruise Control Light......................................3-49
Section 3 Instrument Panel
3-1

The main components of your instrument panel are the
following:
A. Dome Lamp Override Button. SeeDome Lamp
Override on page 3-19.
B. Headlamp Controls. SeeHeadlamps on page 3-14.
C. Air Outlets. SeeOutlet Adjustment on page 3-30.
D. Automatic Transfer Case/Electronic Transfer
Case/Traction Assist System (TAS). SeeFour-Wheel
Drive on page 2-38andTraction Assist System (TAS)
on page 4-8.
E. Multifunction Lever. SeeTurn Signal/Multifunction
Lever on page 3-7.
F. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-32.
G. Range Selection Mode (Allison Transmission
®only)
Button (If Equipped). SeeAutomatic Transmission
Operation on page 2-26.
H. Gearshift Lever. SeeAutomatic Transmission
Operation on page 2-26orManual Transmission
Operation on page 2-34for manual transmissions.
I. Tow/Haul Selector Button (If Equipped).
SeeTow/Haul Mode on page 2-31.
J. Audio System. SeeAudio System(s) on page 3-70.
K. Climate Control System. SeeClimate Control System
on page 3-21,Dual Climate Control System on
page 3-22andDual Automatic Climate Control
System on page 3-25.L. Instrument Panel Fuse Block.Instrument Panel Fuse
Block on page 5-124.
M. Cargo Lamp Button. SeeCargo Lamp on page 3-19.
N. Hood Release. SeeHood Release on page 5-13.
O. Steering Wheel Control Buttons (If Equipped).
SeeDriver Information Center (DIC) on page 3-52
orAudio Steering Wheel Controls on page 3-129.
P. Center Instrument Panel Fuse Block. SeeCenter
Instrument Panel Fuse Block on page 5-126.
Q. Parking Brake Release. SeeParking Brake on
page 2-52.
R. Tilt Wheel Lever. SeeTilt Wheel on page 3-6.
S. Cigarette Lighter. SeeAshtray(s) and Cigarette
Lighter on page 3-20.
T. Accessory Power Outlet. SeeAccessory Power
Outlet(s) on page 3-20.
U. Manual Selectable Ride Control (If Equipped).
SeeManual Selectable Ride on page 4-10.
V. Auxiliary Roof Mounted Lamp Button (If Equipped).
SeeAuxiliary Roof Mounted Lamp on page 3-18.
W. Passenger Airbag Off Switch (If Equipped).
SeeAirbag Off Switch on page 1-78.
X. Glove Box. SeeGlove Box on page 2-79.
3-5

Reducing Speed While Using Cruise
Control
Press in the button at the end of the lever until you
reach the lower speed you want, then release it.
To slow down in very small amounts, briey press
the set button. Each time you do this, you’ll go
about 1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase your speed.
When you take your foot off the pedal, your vehicle will
slow down to the cruise control speed you set earlier.
Using Cruise Control on Hills
How well your cruise control will work on hills depends
upon your speed, load and the steepness of the hills.
When going up steep hills, you may want to step on the
accelerator pedal to maintain your speed. When going
downhill, you may have to brake or shift to a lower gear
to keep your speed down. Of course, applying the brake
takes you out of cruise control. Many drivers nd this to
be too much trouble and don’t use cruise control on
steep hills.
Ending Cruise Control
There are four ways to turn off the cruise control:
Step lightly on the brake pedal,
move the cruise control switch to off, or
shift the transmission to NEUTRAL (N).
If the accelerator pedal is held for 60 seconds or
longer, cruise control will turn off.
Erasing Speed Memory
When you turn off the cruise control or the ignition,
your cruise control set speed memory is erased.
3-13

Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
DRL can be helpful in many different driving conditions,
but they can be especially helpful in the short periods
after dawn and before sunset. Fully functional daytime
running lamps are required on all vehicles rst sold in
Canada.
The DRL system will come on when the following
conditions are met:
The ignition is on
The exterior lamps control is in AUTO
The automatic transmission is not in PARK (P)
The light sensor determines it is daytime
When the DRL are on, only your DRL lamps will be on.
The taillamps, sidemarker and other lamps won’t be on.
The instrument panel won’t be lit up either.
When it begins to get dark, the automatic headlamp
system will switch from DRL to the headlamps.When you turn the headlamp switch off, the headlamps
will go off, and your DRL lamps will illuminate, provided it
is not dark outside.
Shifting the transmission into PARK (P) will allow you to
idle the vehicle with the DRL off. The DRL will stay off
until you shift the transmission out of PARK (P). This
procedure applies only to vehicles rst sold in the
United States.
Automatic Headlamp System
When it is dark enough outside, your automatic headlamp
system will turn on your headlamps at the normal
brightness along with other lamps such as the taillamps,
sidemarker, parking lamps and the instrument panel
lights. The radio lights will also be dim.
To turn off the automatic headlamp system, turn the
exterior lamps switch to the off position and then release.
Turning off the automatic headlamp system with the
headlamp switch is not available for vehicles rst sold in
Canada. For vehicles rst sold in Canada, you can turn
off the automatic headlamp system when parked at
night by applying the parking brake before starting your
vehicle. The headlamps will remain off once the vehicle is
started for as long as you are parked. If you release the
parking brake, the lights will turn on. If the parking brake
is not released before you begin to drive, the exterior
lamps will turn on above 2 mph (3.2 km/h).
3-15

Readings in the low warning zone may occur when a
large number of electrical accessories are operating
in the vehicle and the engine is left at an idle for an
extended period. This condition is normal since the
charging system is not able to provide full power at
engine idle. As engine speeds are increased, this
condition should correct itself as higher engine speeds
allow the charging system to create maximum power.
You can only drive for a short time with the reading
in either warning zone. If you must drive, turn off
all unnecessary accessories.
Readings in either warning zone indicate a possible
problem in the electrical system. Have the vehicle
serviced as soon as possible.
Up-Shift Light
(Manual Transmission)
This light is used on
some models with
manual transmissions.
The shift indicator light will show you when to shift to
the next highest gear, and will help you get the best fuel
economy.
Brake System Warning Light
With the ignition on, the brake system warning light will
ash when you set the parking brake. The light will ash if
the parking brake doesn’t release fully. If you try to drive
with the parking brake engaged, a chime will sound when
the vehicle speed is greater than 3 mph (5 km/h).
Your vehicle’s hydraulic brake system is divided into
two parts. If one part isn’t working, the other part can
still work and stop you. For good braking, though,
you need both parts working well.
If the warning light comes on and a chime sounds there
could be a brake problem. Have your brake system
inspected right away.
This light should come on briey when you turn the
ignition key to RUN. If it doesn’t come on then, have it
xed so it will be ready to warn you if there’s a problem.
United StatesCanada
3-41