wheel GMC SIERRA CLASSIC 2007 Owners Manual

Service and Appearance Care
.................. 465
Service
................................................. 468
Fuel
...................................................... 470
Checking Things Under the Hood
......... 478
Rear Axle
............................................. 527
Four-Wheel Drive
.................................. 528
Front Axle
............................................ 529
Noise Control System
........................... 531
Bulb Replacement
................................ 532
Windshield Wiper Blade
Replacement
..................................... 542
Tires
..................................................... 543
Appearance Care
.................................. 589
Vehicle Identication
............................. 598
Electrical System
.................................. 599
Capacities and Specications
................ 609Maintenance Schedule
.............................. 613
Maintenance Schedule
.......................... 614
Customer Assistance Information
............. 637
Customer Assistance and
Information
........................................ 638
Reporting Safety Defects
...................... 656
Index
.......................................................... 659
2

Your vehicle has a light
that comes on as a
reminder to buckle up.
SeeSafety Belt
Reminder Light on
page 247.
In most states and in all Canadian provinces, the
law says to wear safety belts. Here is why:
They work.
You never know if you will be in a crash. If you do
have a crash, you do not know if it will be a
bad one.
A few crashes are mild, and some crashes can be
so serious that even buckled up, a person
would not survive. But most crashes are in
between. In many of them, people who buckle up
can survive and sometimes walk away. Without
belts they could have been badly hurt or killed.
After more than 40 years of safety belts in
vehicles, the facts are clear. In most crashes
buckling up does matter... a lot!Why Safety Belts Work
When you ride in or on anything, you go as fast
as it goes.
Take the simplest vehicle. Suppose it is just a
seat on wheels.
23

There is an airbag
readiness light on the
instrument panel cluster,
which shows the
airbag symbol.
The system checks the airbag electrical system for
malfunctions. The light tells you if there is an
electrical problem. SeeAirbag Readiness Light on
page 247for more information.Where Are the Airbags?
The driver’s airbag is in the middle of the steering
wheel.
93

The right front passenger’s airbag is in the
instrument panel on the passenger’s side.
{CAUTION:
If something is between an occupant and
an airbag, the bag might not inate
properly or it might force the object into
that person causing severe injury or even
death. The path of an inating airbag must
be kept clear. Do not put anything
between an occupant and an airbag, and
do not attach or put anything on the
steering wheel hub or on or near any
other airbag covering.
94

Dual Stage Airbags
If your vehicle has frontal airbags with dual stage
deployment, the amount of restraint will adjust
according to crash severity. Your vehicle has
electronic frontal sensors which help the sensing
system distinguish between a moderate and a
more severe frontal impact. For moderate frontal
impacts, these airbags inate at a level less
than full deployment. For more severe frontal
impacts, full deployment occurs. If the front of your
vehicle goes straight into a wall that does not
move or deform, the threshold level for the
reduced deployment is about 10 to 16 mph
(16 to 25 km/h), and the threshold level for a full
deployment is about 20 to 30 mph (32 to 48 km/h).
The threshold level can vary, however, with
specic vehicle design, so that it can be somewhat
above or below this range.Vehicle’s with dual stage airbags also have
special sensors which enable the sensing system
to monitor the position of both the driver and
passenger front seats. The seat position sensor
provides information which is used to determine if
the airbags should deploy at a reduced level or
at full deployment.
What Makes an Airbag Inate?
In an impact of sufficient severity, the airbag
sensing system detects that the vehicle is in a
crash. The sensing system triggers a release of gas
from the inator, which inates the airbag. The
inator, airbag, and related hardware are all part of
the airbag modules inside the steering wheel and in
the instrument panel in front of the right front
passenger.
97

How Does an Airbag Restrain?
In moderate to severe frontal or near-frontal
collisions, even belted occupants can contact the
steering wheel or the instrument panel. The airbag
supplements the protection provided by safety
belts. Airbags distribute the force of the impact
more evenly over the occupant’s upper body,
stopping the occupant more gradually. But airbags
would not help you in many types of collisions,
including rollovers, rear impacts, and many side
impacts, primarily because an occupant’s motion is
not toward those airbags. Airbags should never be
regarded as anything more than a supplement to
safety belts, and then only in moderate to severe
frontal or near-frontal collisions.
What Will You See After an Airbag
Inates?
After an airbag inates, it quickly deates, so
quickly that some people may not even realize the
airbag inated. Some components of the airbag
module — the steering wheel hub for the driver’s
airbag or the instrument panel for the right
front passenger’s bag — may be hot for a short
time. The parts of the airbag that come into contact
with you may be warm, but not too hot to touch.
There will be some smoke and dust coming
from the vents in the deated airbags. Airbag
ination does not prevent the driver from seeing
out of the windshield or being able to steer
the vehicle, nor does it stop people from leaving
the vehicle.
98

Q:What if I added a snow plow? Will it keep
the airbags from working properly?
A:We have designed our airbag systems to work
properly under a wide range of conditions,
including snow plowing with vehicles that have
the optional Snow Plow Prep Package
(RPO VYU). But do not change or defeat the
snow plow’s “tripping mechanism.” If you
do, it can damage your snow plow and your
vehicle, and it may cause an airbag ination.
Q:Because I have a disability, I have to get
my vehicle modied. How can I nd out
whether this will affect my advanced airbag
system?
A:Changing or moving any parts of the front
seats, safety belts, the airbag sensing and
diagnostic module, steering wheel, instrument
panel, the inside review mirror, or airbag
wiring can affect the operation of the airbag
system. If you have questions, call Customer
Assistance. The phone numbers and
addresses for Customer Assistance are in
Step Two of the Customer Satisfaction
Procedure in this manual. SeeCustomer
Satisfaction Procedure on page 638.
110

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. SeeCare of Safety Belts on page 592
for more information.
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.Notice:If you damage the covering for the
driver’s or the right front passenger’s airbag,
the airbag may not work properly. You may
have to replace the airbag module in the
steering wheel or both the airbag module and
the instrument panel for the right front
passenger’s airbag. Do not open or break the
airbag coverings.
111

Keys............................................................ 115
Remote Keyless Entry System.................. 116
Remote Keyless Entry System
Operation............................................... 117
Doors and Locks........................................ 120
Door Locks................................................ 120
Power Door Locks..................................... 121
Delayed Locking........................................ 122
Programmable Automatic Door Locks........ 123
Rear Door Security Locks (Crew Cab)....... 126
Lockout Protection..................................... 126
Rear Doors............................................... 126
Tailgate..................................................... 127
Windows...................................................... 129
Manual Windows....................................... 129
Power Windows........................................ 130
Swing-Out Windows.................................. 131
Sliding Rear Window................................. 131
Sun Visors................................................ 131Theft-Deterrent Systems............................. 131
Content Theft-Deterrent............................. 131
Passlock
®.................................................. 133
Starting and Operating Your Vehicle......... 134
New Vehicle Break-In................................ 134
Ignition Positions....................................... 135
Retained Accessory Power (RAP)............. 137
Starting the Engine.................................... 137
Engine Coolant Heater.............................. 139
Automatic Transmission Operation............. 140
Tow/Haul Mode......................................... 147
Manual Transmission Operation................. 149
Four-Wheel Drive...................................... 153
Parking Brake........................................... 169
Shifting Into Park (P)
(Automatic Transmission)....................... 170
Shifting Out of Park (P)
(Automatic Transmission)....................... 172
Parking Over Things That Burn................. 173
Engine Exhaust......................................... 174
Running the Engine While Parked............. 175
Section 2 Features and Controls
113

Ignition Positions
With the key in the ignition switch, you can turn it
to four different positions.
Notice:Using a tool to force the key from the
ignition switch could cause damage or break
the key. Use the correct key and turn the key
only with your hand. Make sure the key is all the
way in. If it is, turn the steering wheel left and
right while you turn the key hard. If none of this
works, then your vehicle needs service.A (LOCK):This position locks your ignition when
the key is removed. The steering locks when
equipped with a manual transmission. It is
a theft-deterrent feature. You will only be able to
remove your key when the ignition is turned
to LOCK.
B (ACCESSORY):This position allows you to use
things like the radio, power windows and the
windshield wipers when the engine is off.
{CAUTION:
On manual transmission vehicles, turning
the key to LOCK will lock the steering
column and result in a loss of ability to
steer the vehicle. This could cause a
collision. If you need to turn the engine
off while the vehicle is moving, turn the
key only to ACCESSORY. Do not press
the key release button while the vehicle is
moving.
135