2005 GMC SIERRA DENALI climate control

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
............................................... 1-6
Safety Belts
.............................................. 1-8
Child Restraints
.......................................1-27
Airbag System
.........................................1-48
Restraint System Check
............................1-61
Features and Controls..................................... 2-1
Keys
........................................................ 2-2
Doors and Locks
....................................... 2-7
Windows
.................................................2-12
Theft-Deterrent Systems
............................2-14
Starting and Operating Your Vehicle
...........2-16
Mirrors
....................................................2-29
OnStar
®System
......................................2-34
HomeLink®Transmitter
.............................2-36
Storage Areas
.........................................2-41
Sunroof
..................................................2-43
Vehicle Personalization
.............................2-44
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-20
Warning Lights, Gages, and Indicators
........3-26
Driver Information Center (DIC)
..................3-42Audio System(s)
.......................................3-60
Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-51
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under the Hood
...............5-10
All-Wheel Drive
........................................5-46
Rear Axle
...............................................5-47
Front Axle
...............................................5-48
Bulb Replacement
....................................5-49
Windshield Wiper Blade Replacement
.........5-55
Tires
......................................................5-56
Appearance Care
.....................................5-92
Vehicle Identication
...............................5-101
Electrical System
....................................5-102
Capacities and Specications
...................5-112
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information.............. 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-10
Index................................................................ 1
2005 GMC Sierra Denali Owner ManualM

Vehicle Damage Warnings
Also, in this manual you will nd these notices:
Notice:These mean there is something that could
damage your vehicle.
A notice tells about something that can damage the
vehicle. Many times, this damage would not be covered
by your vehicle’s warranty, and it could be costly. But
the notice will tell what to do to help avoid the damage.
When you read other manuals, you might see
CAUTION and NOTICE warnings in different colors or in
different words.
There are also warning labels on the vehicle. They use
the same words, CAUTION or NOTICE.
Vehicle Symbols
The vehicle has components and labels that use
symbols instead of text. Symbols are shown along with
the text describing the operation or information
relating to a specic component, control, message,
gage, or indicator.
If you need help guring out a specic name of a
component, gage, or indicator, reference the following
topics:
Seats and Restraint Systems in Section 1
Features and Controls in Section 2
Instrument Panel Overview in Section 3
Climate Controls in Section 3
Warning Lights, Gages, and Indicators in Section 3
Audio System(s) in Section 3
Engine Compartment Overview in Section 5
iv

Running Your Engine While You
Are Parked
It is better not to park with the engine running. But if
you ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier caution under
Engine Exhaust on page 2-27.
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the climate control fan is at the highest setting.
One place this can happen is a garage.
Exhaust — with CO — can come in easily.
NEVER park in a garage with the engine
running.
Another closed-in place can be a blizzard. See
Winter Driving on page 4-36.
{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. Do not leave your vehicle when the engine
is running unless you have to. 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, always set your
parking brake and move the shift lever to
PARK (P).
Follow the proper steps to be sure your vehicle will not
move. SeeShifting Into Park (P) on page 2-25.
If you are pulling a trailer, seeTowing a Trailer on
page 4-52.
2-28

Outside Convex Mirror
Your passenger’s side mirror is convex. A convex
mirror’s surface is curved so you can see more from the
driver’s seat.
{CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
Outside Heated Mirrors
The vehicle may have outside heated mirrors which
helps clear them of condensation, snow, and ice. There
is a heated mirror symbol on the driver’s side mirror
that indicates the feature.
When the rear window defogger button is pressed, the
heated mirrors are turned on. See “Rear Window
Defogger” underDual Automatic Climate Control System
on page 3-20for further information.
OnStar®System
OnStar®uses global positioning system (GPS) satellite
technology, wireless communications, and call centers
to provide you with a wide range of safety, security,
information, and convenience services.
A complete OnStar
®user’s guide and the terms and
conditions of the OnStar®Subscription Service
Agreement are included in the vehicle’s glove box
literature. For more information, visit www.onstar.com or
www.onstarcanada.com. Contact OnStar
®at
1-888-4-ONSTAR (1-888-466-7827), or press the
OnStar
®button to speak to an OnStar®advisor 24 hours
a day, 7 days a week.
Terms and conditions of the Subscription Service
Agreement can be found at www.onstar.com or
www.onstarcanada.com.
2-34

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..................................................3-13
Headlamps on Reminder................................3-14
Daytime Running Lamps (DRL).......................3-14
Automatic Headlamp System..........................3-15
Puddle Lamps..............................................3-16
Fog Lamps..................................................3-16
Instrument Panel Brightness...........................3-16
Dome Lamps...............................................3-17
Dome Lamp Override....................................3-17
Entry Lighting...............................................3-17
Exit Lighting.................................................3-17
Front Reading Lamps....................................3-18
Cargo Lamp.................................................3-18
Battery Run-Down Protection..........................3-18
Accessory Power Outlets...............................3-18Ashtrays and Cigarette Lighter........................3-19
Climate Controls............................................3-20
Dual Automatic Climate Control System...........3-20
Outlet Adjustment.........................................3-25
Warning Lights, Gages, and Indicators............3-26
Instrument Panel Cluster................................3-27
Speedometer and Odometer...........................3-28
Trip Odometer..............................................3-28
Tachometer.................................................3-28
Safety Belt Reminder Light.............................3-28
Airbag Readiness Light..................................3-29
Passenger Airbag Status Indicator...................3-29
Battery Warning Light....................................3-31
Voltmeter Gage............................................3-31
Brake System Warning Light..........................3-32
Anti-Lock Brake System Warning Light.............3-33
Engine Coolant Temperature Gage..................3-34
Transmission Temperature Gage.....................3-34
Malfunction Indicator Lamp.............................3-36
Oil Pressure Gage........................................3-39
Security Light...............................................3-40
Cruise Control Light......................................3-40
Highbeam On Light.......................................3-40
Tow/Haul Mode Light....................................3-40
Fuel Gage...................................................3-41
Low Fuel Warning Light.................................3-41
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 3-17.
B. Headlamp Control. SeeHeadlamps on page 3-13.
C. Air Outlets. SeeDual Automatic Climate Control
System on page 3-20
D. Multifunction Lever. SeeTurn Signal/Multifunction
Lever on page 3-7.
E. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-27.
F. Gearshift Lever. SeeAutomatic Transmission
Operation on page 2-20.
G. Tow/Haul Selector Switch (If Equipped). See
Tow/Haul Mode on page 2-23.
H. Audio System. SeeAudio System(s) on page 3-60.
I. Comfort Control System. SeeDual Automatic
Climate Control System on page 3-20.J. Instrument Panel Fuse Block. SeeInstrument Panel
Fuse Block on page 5-103.
K. Hood Release. SeeHood Release on page 5-10.
L. Audio Steering Wheel Controls (If Equipped). See
Audio Steering Wheel Controls on page 3-91.
M. Center Instrument Panel Fuse Block. SeeCenter
Instrument Panel Fuse Block on page 5-106.
N. Tilt Lever. SeeTilt Wheel on page 3-6.
O. Parking Brake Release. SeeParking Brake on
page 2-24.
P. Compact Disc Changer (If Equipped). SeeCD
Changer on page 3-87.
Q. Ashtray. SeeAccessory Power Outlets on page 3-18.
R. Accessory Power Outlet. SeeAccessory Power
Outlets on page 3-18.
S. Glovebox. SeeGlove Box on page 2-41.
3-5

Climate Controls
Dual Automatic Climate Control
System
With this system, you can control the heating, cooling
and ventilation in your vehicle.
You can select different climate control settings for the
driver and passengers.
Driver’s Side Temperature Knob
The driver’s side knob is used to adjust the temperature
of the air coming through the system on the driver’s
side. The temperature can be adjusted even if the
system is turned off. This is possible since outside air
will always ow through the system as the vehicle
is moving forward unless it is set to recirculation mode.
See “Recirculation” later in this section.
Turn the knob counterclockwise or clockwise to lower or
increase the cabin temperature. The display will show
the temperature setting decreasing or increasing and an
arrow pointing to the driver will be displayed under
and to the left of the temperature setting.
Passenger’s Side Temperature Knob
The passenger’s side knob can be used to change the
temperature of the air coming through the system on the
passenger’s side of the vehicle. The temperature can be
adjusted even if the system is turned off. This is possible
since outside air will always ow through the system as
the vehicle is moving forward unless it is set to
recirculation mode. See “Recirculation” later in this
section.
3-20

2. Set the driver’s and passenger’s temperature.
To nd your comfort setting, start with a 74°F (23°C)
temperature setting and allow about 20 minutes
for the system to regulate. Turn the driver’s or
passenger’s side temperature knob to adjust the
temperature setting as necessary. If you choose the
temperature setting of 60°F (15°C) the system
will remain at the maximum cooling setting. If you
choose the temperature setting of 90°F (32°C)
the system will remain at the maximum heat setting.
Choosing either maximum setting will not cause
the vehicle to heat or cool any faster.
Be careful not to cover the sensor located on the
top of the instrument panel near the windshield. This
sensor regulates air temperature based on sun
load, and also turns on your headlamps.
To avoid blowing cold air in cold weather, the
system will delay turning on the fan until warm air is
available. The length of delay depends on the
engine coolant temperature. Pressing the fan switch
will override this delay and change the fan to a
selected speed.9(Off):Press this button to turn off the entire climate
control system. Outside air will still enter the vehicle, and
will be directed to the oor. This direction can be changed
by pressing the mode button. The temperature can also
be adjusted using either temperature knob. Press the up
or down arrows on the fan switch, the defrost button, the
AUTO button, or the air conditioning button to turn the
system on when it is off.
Manual Operation
You may manually adjust the air delivery mode or fan
speed.
w9x(Fan):The switch with the fan symbol allows
you to manually adjust the fan speed. Press the up
arrow to increase fan speed and the down arrow
to decrease fan speed.
Pressing this button when the system is off will turn the
system on.
3-22