Page 65 of 374

Servicing Your Airbag-Equipped
Vehicle
Airbags affect how your vehicle should be serviced.
There are parts of the airbag system in several places
around your vehicle. You do not want the system to
inflate while someone is working on your vehicle.
Your dealer and the service manual have information
about servicing your vehicle and the airbag system.
To purchase a service manual, seeService Publications
Ordering Information on page 7-8.
{CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an
airbag can still in ate during improper service.
You can be injured if you are close to an
airbag when it in ates. Avoid yellow wires,
wires wrapped with yellow tape or yellow
connectors. They are probably part of the
airbag system. Be sure to follow proper
service procedures, and make sure the person
performing work for you is quali ed to do so.
The airbag system does not need regular maintenance.
Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to the front of
the vehicle that could keep the airbags from
working properly?
A:Yes. If you add things that change your vehicle’s
frame, bumper system, front end sheet metal or
height, they may keep the airbag system from
working properly. Also, the airbag system may not
work properly if you relocate any of the airbag
sensors. If you have any questions about this,
you should contact Customer Assistance before
you modify your vehicle. The phone numbers
and addresses for Customer Assistance are in
Step Two of theCustomer Satisfaction Procedure
on page 7-2.
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Restraint System Check
Checking the Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken airbag covers, and
have them repaired or replaced. (The airbag system
does not need regular maintenance.)
Replacing Restraint System Parts
After a Crash
{CAUTION:
A crash can damage the restraint systems in
your vehicle. A damaged restraint system
may not properly protect the person using it,
resulting in serious injury or even death in a
crash. To help make sure your restraint
systems are working properly after a crash,
have them inspected and any necessary
replacements made as soon as possible.
If you have had a crash, do you need new belts?
After a very minor collision, nothing may be necessary.
But if the belts were stretched, as they would be if worn
during a more severe crash, then you need new parts.
If belts are cut or damaged, replace them. Collision
damage also may mean you will need to have safety
belt or seat parts repaired or replaced. New parts
and repairs may be necessary even if the belt was not
being used at the time of the collision.
If an airbag inflates, you will need to replace airbag
system parts. See the part on the airbag system earlier
in this section.
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Page 67 of 374

Keys...............................................................2-2
Remote Keyless Entry System.........................2-3
Remote Keyless Entry System Operation...........2-4
Doors and Locks.............................................2-6
Door Locks....................................................2-6
Power Door Locks..........................................2-7
Windows.........................................................2-8
Manual Windows............................................2-8
Power Windows.............................................2-9
Sliding Rear Window.....................................2-10
Sun Visors...................................................2-10
Starting and Operating Your Vehicle................2-11
New Vehicle Break-In....................................2-11
Ignition Positions..........................................2-12
Engine Starter Over-Crank Protection..............2-12
Starting the Gasoline Engine..........................2-12
Starting the Diesel Engine..............................2-14
Engine Alarm and Automatic Shutdown............2-18
High Idle System (Caterpillar
®Diesel/
Gasoline Engine).......................................2-19
Exhaust Restrictor (DURAMAX
®Diesel)...........2-21
Engine Checks Before Operating....................2-22
Engine Coolant Heater..................................2-24Diesel Engine Exhaust Brake.........................2-25
Two-Speed Rear Axle Electric Shift Control......2-26
Air Shift Control (Automatic Transmission)........2-27
Automatic Transmission Operation...................2-28
Manual Transmission Operation......................2-29
Four-Wheel Drive..........................................2-33
Parking.......................................................2-38
Hydraulic Brakes (Parking Brake Operation)......2-38
Propshaft Brake Burnish Procedure.................2-39
Air Brake.....................................................2-40
Air Suspension.............................................2-42
Parking Over Things That Burn.......................2-43
Engine Exhaust............................................2-43
Running the Engine While Parked...................2-44
Mirrors...........................................................2-45
Manual Rearview Mirror.................................2-45
Outside Manual Mirrors..................................2-45
Outside Power Mirrors...................................2-45
Outside Convex Mirrors.................................2-46
Outside Heated Mirrors..................................2-46
Storage Areas................................................2-47
Center Console Storage Area.........................2-47
Section 2 Features and Controls
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Page 68 of 374
Keys
{CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons. They could
operate the power windows or other controls or
even make the vehicle move. The children or
others could be badly injured or even killed.
Do not leave the keys in a vehicle with children.
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Page 69 of 374

Your vehicle has one
double-sided key for the
ignition and all door locks.
If you ever lose your key, your dealer will be able to
assist you with obtaining a new one.
Notice:If you ever lock your keys in your vehicle,
you may have to damage the vehicle to get in.
Be sure you have spare keys.
If you ever do get locked out of your vehicle, call GM
Roadside Assistance Center. SeeRoadside Assistance
Program on page 7-5.Remote Keyless Entry System
If equipped, the keyless entry system operates on a
radio frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modifications to this system by other than
an authorized service facility could void authorization to
use this equipment.
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Page 70 of 374

At times you may notice a decrease in range. This is
normal for any remote keyless entry system. If the
transmitter does not work or if you have to stand closer
to your vehicle for the transmitter to work, try this:
•Check the distance. You may be too far from your
vehicle. You may need to stand closer during
rainy or snowy weather.
•Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
•Check to determine if battery replacement is
necessary. See “Battery Replacement” under
Remote Keyless Entry System Operation on
page 2-4.
•If you are still having trouble, see your dealer or a
qualified technician for service.
Remote Keyless Entry System
Operation
If your vehicle has this feature, you can lock and unlock
your doors from about 3 feet (1 m) up to 30 feet (9 m)
away using the remote keyless entry transmitter supplied
with your vehicle.
To unlock the driver’s
door, press the UNLOCK
button one time.
If you press the button again within five seconds, all of
the doors will unlock. When the UNLOCK button is
pressed, the interior dome lamps are turned on for about
40 seconds or until the ignition switch is activated.
Press the LOCK button to lock all doors.
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Page 71 of 374

Matching Transmitter(s) to Your Vehicle
Each remote keyless entry transmitter is coded to
prevent another transmitter from unlocking your vehicle.
If a transmitter is lost or stolen, a replacement can
be purchased through your dealer. Remember to bring
any remaining transmitters with you when you go to
your dealer. When the dealer matches the replacement
transmitter to your vehicle, any remaining transmitters
must also be matched. Once your dealer has coded the
new transmitter, the lost transmitter will not unlock
your vehicle. Each vehicle can have a maximum of
four transmitters matched to it.
Battery Replacement
Under normal use, the battery in your remote keyless
entry transmitter should last about two years.
You can tell the battery is weak if the transmitter won’t
work at the normal range in any location. If you have
to get close to your vehicle before the transmitter works,
it’s probably time to change the battery.Notice:When replacing the battery, use care not to
touch any of the circuitry. Static from your body
transferred to these surfaces may damage the
transmitter.
1. Insert a thin object, such as a coin, into the slot
between the covers of the transmitter near the key
ring hole. Remove the bottom by twisting the object.
2. Remove and replace the battery, positive (+) side
down. Use one Panasonic
®type CR2032 battery.
3. Align the covers and snap them together.
4. Check the operation of the transmitter. If the
transmitter does not work after battery replacement,
it may need to be resynchronized to your vehicle.
SeeResynchronizationfollowing.
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Page 72 of 374

Resynchronization
Resynchronization may be necessary due to the
security method used by this system. The transmitter
does not send the same signal twice to the receiver.
The receiver will not respond to a signal it has been sent
previously. This prevents anyone from recording and
playing back the signal from the transmitter.
To resynchronize your transmitter, stand close to your
vehicle and simultaneously press and hold the LOCK
and UNLOCK buttons on the transmitter for at least
five seconds. The door locks should cycle to confirm
resynchronization. If the locks do not cycle, see
your dealer for service.
Doors and Locks
Door Locks
{CAUTION:
Unlocked doors can be dangerous.
Passengers — especially children — can
easily open the doors and fall out of a
moving vehicle. When a door is locked,
the handle will not open it. You increase
the chance of being thrown out of the
vehicle in a crash if the doors are not
locked. So, wear safety belts properly and
lock the doors whenever you drive.
Young children who get into unlocked
vehicles may be unable to get out. A child
can be overcome by extreme heat and can
suffer permanent injuries or even death
from heat stroke. Always lock your vehicle
whenever you leave it.
Outsiders can easily enter through an
unlocked door when you slow down or
stop your vehicle. Locking your doors can
help prevent this from happening.
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