ignition GMC SIERRA 2007 Service Manual

If the mirrors are accidentally folded/unfolded
manually, they may shake or utter at normal
driving speeds and may not stay in the unfolded
position. If this happens, you will need to reset the
mirrors. See “Resetting the Power Foldaway
Mirrors” next.
Resetting the Power Foldaway Mirrors
You will need to reset the power foldaway mirrors
if the following occurs:
The mirrors are accidentally obstructed while
folding.
They are accidentally manually
folded/unfolded.
The mirrors will not stay in the unfolded
position.
The mirrors shake and utter at normal
driving speeds.
To reset the power foldaway mirrors, fold and
unfold them one time using the mirror controls.
This will reset them to their normal position.
This mirror has the following features.
Automatic Dimming
The driver’s outside mirror will adjust for the glare
of the headlamps behind you. SeeAutomatic
Dimming Rearview Mirror with OnStar
®, Compass
and Temperature Display on page 169.
Curb View Assist
If your vehicle has the memory package, the
outside mirrors are able to perform the curb view
assist mirror function. This feature may be
useful in allowing the driver to view the curb when
parallel parking. This feature will cause the
passenger’s and/or driver’s mirror to tilt to a
preselected position when the vehicle is in
REVERSE (R).
The passenger’s and/or driver’s mirror will return
to its original position when the vehicle is
shifted out of REVERSE (R), or the ignition is
turned off or to LOCK.
This feature can be turned on or off through the
Driver Information Center (DIC). SeeDriver
Information Center (DIC) on page 267.
178

The rails are notched at each end which allows
the tie-downs to be removed and placed on
another rail. To remove, pull the locator pin out
and slide the tie-down to the end of the rail
and pull back.
To remove or install cargo tie-downs at the front of
the bed, slide the corner cap towards the center of
the bed to expose the rail notches. To remove the
corner cap, pull either edge away from the rail.
To remove the system, loosen the toggle bolts
on each rail until they can be removed from the
bed of the truck. To replace the system, place the
toggle bolts and rails into their original locations
and tighten them to a torque setting of
12.5 ft-lbs (17
Y).
If the system is removed to install a bed liner,
make sure there is no bed liner material in
the installation points.
Notice:If you tie down cargo using the
horizontal slots on the top of the pickup box,
you may damage the box. Using the horizontal
slots on the top of the pickup box for tie-down
locations may cause damage to the pickup box
and would not be covered by your warranty.
Only use the tie-down loops if you do not have
the cargo management system.
Sunroof
If your vehicle has a power sliding sunroof, the
ignition needs to be turned to RUN, or the
Retained Accessory Power (RAP) must be
activated to open or close the sunroof. When RAP
is active, the sunroof will work for 10 minutes
after the ignition is turned off, or until the driver’s
door is opened. SeeRetained Accessory
Power (RAP) on page 134for more information.
Extended Cab
If your vehicle is an
extended-cab, the
sunroof switch is located
on the headliner above
the rearview mirror.
Vent:From the closed position, press and hold the
rear of the switch to vent the sunroof. To close the
sunroof, press and hold the front of the switch.
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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

Erasing Speed Memory
When you turn off the cruise control or the ignition,
the cruise control set speed memory is erased.
Exterior Lamps
The exterior lamps
control is located on the
instrument panel to the
left of the steering wheel.
It controls the following systems:
Headlamps
Taillamps
Parking Lamps
License Plate Lamps
Instrument Panel Lights
The exterior lamps control has four positions:
O(Off):Turn the control to this position to turn
off the automatic headlamps and daytime
running lamps (DRL). Turn the headlamp control
to the off position again to turn the automatic
headlamps or DRL back on.For vehicles rst sold in Canada, the off position
will only work when the vehicle is shifted into
PARK (P).
AUTO (Automatic):Turn the control to this
position to automatically turn on the headlamps at
normal brightness, together with the following:
Parking Lamps
Instrument Panel Lights
Taillamps
License Plate Lamps
When the vehicle is turned off and the headlamps
are in AUTO, the headlamps may automatically
remain on for a set time. The time of the delay can
be changed using the DIC. SeeDriver Information
Center (DIC) on page 267.
;(Parking Lamps):Turn the control to this
position to turn on the parking lamps together with
the following:
Instrument Panel Lights
Taillamps
License Plate Lamps
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2(Headlamps):Turn the control to this position
to turn on the headlamps together with the
following:
Parking Lamps
Instrument Panel Lights
Taillamps
License Plate Lamps
When the headlamps are turned on while the
vehicle is on, the headlamps turn off automatically
10 minutes after the ignition is turned off. When
the headlamps are turned on while the vehicle
is off, the headlamps will stay on for 10 minutes
before automatically turning off to prevent the
battery from being drained. Turn the headlamp
control to off and then back to the headlamp
on position to make the headlamps stay on for an
additional 10 minutes.
Push the turn signal/multifunction lever toward the
instrument panel to change the headlamps
from low beam to high beam.
Headlamps on Reminder
A reminder chime will sound when the headlamps
or parking lamps are manually turned on and
your ignition is off and a door is open. To disable
the chime, turn the light off.
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 DRL are required on all
vehicles rst sold in Canada.
The DRL system will come on when the following
conditions are met:
The engine is running.
The ignition is on.
The exterior lamps control is in AUTO.
The light sensor determines it is daytime.
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When the DRL are on, only your DRL lamps will
be on. The taillamps, sidemarker, and other lamps
will not be on. The instrument panel back
lighting will not be on either.
When it begins to get dark, the automatic headlamp
system will switch from DRL to the headlamps.
When the headlamp switch is turned off, the
headlamps will go off.
Automatic Headlamp System
When it is dark enough outside, the automatic
headlamp system will turn on the headlamps at the
normal brightness, along with the taillamps,
sidemarker, parking lamps, and the instrument
panel lights. The radio back lighting will also be
dimly lit.
To turn off the automatic headlamp system, turn
the exterior lamps switch to the off position.
Turning off the automatic headlamp system with
the headlamp switch is not available for vehicles
rst sold in Canada.
Your vehicle has a light sensor located on the top
of the instrument panel in the defroster grille
that regulates when the automatic headlamps turn
on. Be sure it is not covered, or the headlamps
will come on whenever the ignition is on.The system may also turn on the headlamps when
driving through a parking garage, heavy overcast
weather, or a tunnel. This is normal.
There is a delay in the transition between the
daytime and nighttime operation of the Daytime
Running Lamps (DRL) and the automatic headlamp
systems so that driving under bridges or bright
overhead street lights does not affect the system.
The DRL and automatic headlamp system will only
be affected when the light sensor detects a change
in lighting lasting longer than the delay.
If you start your vehicle in a dark garage, the
automatic headlamp system will come on
immediately. Once you leave the garage, it will
take approximately one minute for the automatic
headlamp system to change to DRL if it is
bright enough outside. During that delay, your
instrument panel cluster may not be as bright as
usual. Make sure your instrument panel brightness
control is in the full bright position. SeeInstrument
Panel Brightness on page 225.
223

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

EPM works to prevent excessive discharge of the
battery. It does this by balancing the generator’s
output and the vehicle’s electrical needs. It
can increase engine idle speed to generate more
power, whenever needed. It can temporarily
reduce the power demands of some accessories.
Normally, these actions occur in steps or levels,
without being noticeable. In rare cases at the
highest levels of corrective action, this action may
be noticeable to the driver. If so, a Driver
Information Center (DIC) message might be
displayed, such as Battery Saver Active or Service
Battery Charging System. If this message is
displayed, it is recommended that the driver
reduce the electrical loads as much as possible.
SeeDIC Warnings and Messages on page 279.
Battery Run-Down Protection
This feature shuts off the dome and reading
lamps, if they are left on for more than 10 minutes
when the ignition is turned off. The cargo lamp
will shut off after 20 minutes. This will keep
the battery from running down.
Ultrasonic Rear Parking
Assist (URPA)
If your vehicle has the Ultrasonic Rear Parking
Assist (URPA) system it is designed to help you
park while in Reverse (R). It operates only at
speeds less than 5 mph (8 km/h). URPA helps
make parking easier and helps you avoid colliding
with objects such as parked vehicles. The URPA
system detects objects that are close to the rear of
the vehicle which are at least 10 inches (25.4 cm)
off the ground and below hood or trunk level. The
system detects objects up to 8 feet (2.5 m) behind
your vehicle. The URPA sensors determine how
close these objects are from your bumper within
this area.
228

:(Outside Air):Press this button to turn the
outside air mode on. When the button is pressed,
an indicator light will come on. When this mode is
on, outside air will circulate throughout the vehicle.
The outside air mode can be used with all modes,
but it cannot be used with the recirculation mode.
Pressing this button again will cancel the
recirculation mode.
?(Recirculation):Press this button to turn
the recirculation mode on. When the button
is pressed, an indicator light will come on.
This mode keeps outside air from entering the
vehicle. It can be used to reduce outside air and
prevent odors from entering the vehicle.
Recirculation may also help cool the air inside the
vehicle more quickly once the temperature inside
the vehicle is less than the outside temperature.
The recirculation mode cannot be used with oor,
defog or defrost modes. If recirculation is selected
with one of these modes, the indicator light will ash
three times and then turn off. While in recirculation
mode the windows may fog when the weather is
cold and damp. To clear the fog, select either the
defog or defrost mode and increase the fan speed.The recirculation mode can be turned off by
pressing the outside air button, or by turning
off the ignition.
#(Air Conditioning):Press this button to turn
the air conditioning system on or off. When this
button is pressed, an indicator light on the button
will come on to let you know the air conditioning is
activated. The air conditioning can be selected in
any mode as long as the fan switch is on.
The air conditioning system removes moisture
from the air, so you may sometimes notice a small
amount of water dripping underneath your
vehicle while idling or after turning off the engine.
This is normal.
Defogging and Defrosting
Fog or frost on the inside of windows is a result of
high humidity (moisture) condensing on the cool
window glass. This can be minimized if the climate
control system is used properly. To avoid fogging
windows on rainy and humid days at temperatures
above freezing, run the air conditioning
compressor. It is best to avoid the use of the
recirculation mode, except when maximum A/C
performance is needed or for short times to avoid
exterior odors.
235