To prevent gear damage, this
system also prevents cranking if
the engine is already running.
Engine cranking can be stopped
by turning the ignition switch
to ACC/ACCESSORY or
LOCK/OFF.
Notice:Cranking the engine for
long periods of time, by returning
the key to the START position
immediately after cranking has
ended, can overheat and damage
the cranking motor, and drain the
battery. Wait at least 15 seconds
between each try, to let the
cranking motor cool down.
2. If the engine does not start
after 5-10 seconds, especially in
very cold weather (below 0°F or
−18°C), it could be flooded with
too much gasoline. Push the
accelerator pedal all the way to
the floor and holding it there as
you hold the key in START for a
maximum of 15 seconds. Wait atleast 15 seconds between each
try, to allow the cranking motor to
cool. When the engine starts, let
go of the key and accelerator.
If the vehicle starts briefly but
then stops again, repeat the
procedure. This clears the extra
gasoline from the engine. Do not
race the engine immediately after
starting it. Operate the engine and
transmission gently until the oil
warms up and lubricates all
moving parts.
Notice:The engine is designed
to work with the electronics in the
vehicle. If you add electrical parts
or accessories, you could change
the way the engine operates.
Before adding electrical
equipment, check with your
dealer/retailer. If you do not,
the engine might not perform
properly. Any resulting damage
would not be covered by the
vehicle warranty.Engine Heater
The engine coolant heater, if
available, can help in cold weather
conditions at or below 0°F (−18°C)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the vehicle.
An internal thermostat in the
plug-end of the cord will prevent
engine coolant heater operation at
temperatures above 0°F (−18°C).
8-20 Driving and Operating
3. Turn the ignition to LOCK/OFF.
4. Remove the key.
Leaving the Vehicle With the
Engine Running
{WARNING
It can be dangerous to leave the
vehicle with the engine running.
The vehicle could move suddenly
if the shift lever is not fully in
P (Park) with the parking brake
firmly set. And, if you leave the
vehicle with the engine running,
it could overheat and even catch
fire. You or others could be injured.
Do not leave the vehicle with the
engine running.
If you have to leave the vehicle
with the engine running, the vehicle
must be in P (Park) and the parking
brake set.
Release the button and check that
the shift lever cannot be moved
out of P (Park).
Torque Lock
Torque lock is when the weight of
the vehicle puts too much force on
the parking pawl in the transmission.
This happens when parking on a hill
and shifting the transmission into
P (Park) is not done properly and
then it is difficult to shift out of
P (Park). To prevent torque lock,
set the parking brake and then
shift into P (Park). To find out how,
see “Shifting Into P (Park)” listed
previously.
If torque lock does occur, the
vehicle may need to be pushed
uphill by another vehicle to relieve
the parking pawl pressure, so
you can shift out of P (Park).
Shifting Out of Park
This vehicle is equipped with an
electronic shift lock release system.
The shift lock release is designed to:
•Prevent ignition key removal
unless the shift lever is in P (Park)
with the shift lever button fully
released.
•Prevent movement of the shift
lever out of P (Park), unless the
ignition is in ON/RUN or ACC/
ACCESSORY and the brake
pedal is applied.
The shift lock release is always
functional except in the case of
an uncharged or low voltage
(less than 9 volt) battery.
8-22 Driving and Operating
One to Four Shift Light
Message (V8 Only)
When this message comes on,
you can only shift from 1 (First) to
4 (Fourth) instead of 1 (First) to
2 (Second). The message will be
displayed in the Driver Information
Center.You must complete the shift into
4 (Fourth) to turn off this feature.
This helps you get the best possible
fuel economy.
After shifting to 4 (Fourth), you may
downshift to a lower gear if you
prefer.
Notice:Forcing the shift lever
into any gear except 4 (Fourth)
when the 1 TO 4 SHIFT message
comes on may damage the
transmission. Shift only from
1 (First) to 4 (Fourth) when the
message comes on.
This message will come on when:•The engine coolant temperature
is higher than 76°C (169°F),
•The vehicle is going 24 to
31 km/h (15 to 19 mph) and
•The vehicle is at 21 percent
throttle or less.
Brakes
Antilock Brake
System (ABS)
This vehicle has the Antilock
Brake System (ABS), an advanced
electronic braking system that helps
prevent a braking skid.
When the engine is started and the
vehicle begins to drive away, ABS
checks itself. A momentary motor or
clicking noise might be heard while
this test is going on, and it might
even be noticed that the brake pedal
moves a little. This is normal.
If there is a problem with ABS, this
warning light stays on. SeeAntilock
Brake System (ABS) Warning Light
on page 4-23. Driver Information Center
Driving and Operating 8-31
California Fuel
Requirements
If the vehicle is certified to meet
California Emissions Standards, it is
designed to operate on fuels that
meet California specifications.
See the underhood emission control
label. If this fuel is not available in
states adopting California emissions
standards, the vehicle will operate
satisfactorily on fuels meeting federal
specifications, but emission control
system performance might be
affected. The malfunction indicator
lamp could turn on and the vehicle
might fail a smog-check test.
SeeMalfunction Indicator Lamp
on page 4-19. If this occurs, return
to your authorized dealer/retailer for
diagnosis. If it is determined that the
condition is caused by the type of
fuel used, repairs might not be
covered by the vehicle warranty.
Fuels in Foreign
Countries
If you plan on driving in another
country outside the United States
or Canada, the proper fuel might
be hard to find. Never use leaded
gasoline or any other fuel not
recommended in the previous text
on fuel. Costly repairs caused by
use of improper fuel would not be
covered by the vehicle warranty.
To check the fuel availability, ask
an auto club, or contact a major oil
company that does business in the
country where you will be driving.
Fuel Additives
To provide cleaner air, all gasolines
in the United States are now required
to contain additives that help prevent
engine and fuel system deposits
from forming, allowing the emission
control system to work properly.
In most cases, you should not have
to add anything to the fuel. However,
some gasolines contain only theminimum amount of additive
required to meet U.S. Environmental
Protection Agency regulations.
To help keep fuel injectors and
intake valves clean, or if the vehicle
experiences problems due to dirty
injectors or valves, look for gasoline
that is advertised as TOP TIER
Detergent Gasoline. Look for the
TOP TIER label on the fuel pump to
ensure gasoline meets enhanced
detergency standards developed
by the auto companies. A list of
marketers providing TOP TIER
Detergent Gasoline can be found
at www.toptiergas.com.
For customers who do not use
TOP TIER Detergent Gasoline
regularly, one bottle of GM Fuel
System Treatment PLUS, added
to the fuel tank at every engine oil
change, can help clean deposits
from fuel injectors and intake valves.
GM Fuel System Treatment PLUS
is the only gasoline additive
recommended by General Motors.
It is available at your dealer/retailer.
Driving and Operating 8-45
Driving Characteristics
and Towing Tips
{WARNING
The driver can lose control
when pulling a trailer if the correct
equipment is not used or the
vehicle is not driven properly.
For example, if the trailer is too
heavy, the brakes may not work
well — or even at all. The driver
and passengers could be seriously
injured. The vehicle may also be
damaged; the resulting repairs
would not be covered by the
vehicle warranty. Pull a trailer only
if all the steps in this section have
been followed. Ask your dealer/
retailer for advice and information
about towing a trailer with the
vehicle.The vehicle can tow a trailer if it
is equipped with the proper trailer
towing equipment. To identify the
trailering capacity of the vehicle,
seeTrailer Towing on page 8-53.
Trailering changes handling,
acceleration, braking, durability
and fuel economy. With the added
weight, the engine, transmission,
wheel assemblies and tires are
forced to work harder and under
greater loads. The trailer also adds
wind resistance, increasing the
pulling requirements. For safe
trailering, correctly use the proper
trailering equipment.
The following information has
important trailering tips and rules
for your safety and that of your
passengers. Read this section
carefully before pulling a trailer.
Pulling A Trailer
Here are some important points:
•There are many laws, including
speed limit restrictions that apply
to trailering. Check for legal
requirements with state or
provincial police.
•Do not tow a trailer at all during
the first 1 600 km (1,000 miles)
the new vehicle is driven.
The engine, axle or other
parts could be damaged.
•During the first 800 km
(500 miles) that a trailer is
towed, do not drive over 80 km/h
(50 mph) and do not make starts
at full throttle. This reduces wear
on the vehicle.
Driving and Operating 8-49
Backing Up
Hold the bottom of the steering
wheel with one hand. Then, to move
the trailer to the left, move that
hand to the left. To move the trailer
to the right, move your hand to
the right. Always back up slowly
and, if possible, have someone
guide you.
Making Turns
Notice:Making very sharp turns
while trailering could cause the
trailer to come in contact with the
vehicle. The vehicle could be
damaged. Avoid making very
sharp turns while trailering.
When turning with a trailer, make
wider turns than normal. Do this so
the trailer won’t strike soft shoulders,
curbs, road signs, trees or other
objects. Avoid jerky or sudden
maneuvers. Signal well in advance.
Turn Signals When Towing a
Trailer
The arrows on the instrument panel
flash whenever signaling a turn
or lane change. Properly hooked up,
the trailer lamps also flash, telling
other drivers the vehicle is turning,
changing lanes or stopping.
When towing a trailer, the arrows on
the instrument panel flash for turns
even if the bulbs on the trailer are
burned out. For this reason you
may think other drivers are seeing
the signal when they are not. It is
important to check occasionally to be
sure the trailer bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower
gear before starting down a long or
steep downgrade. If the transmission
is not shifted down, the brakes might
have to be used so much that they
would get hot and no longer
work well.Vehicles with an automatic
transmission can tow in D (Drive).
Shift the transmission to a lower
gear if the transmission shifts
too often under heavy loads and/or
hilly conditions. For vehicles with
a manual transmission, it is
better not to use the highest gear.
When towing at high altitude on
steep uphill grades, consider the
following: Engine coolant will boil at
a lower temperature than at normal
altitudes. If the engine is turned off
immediately after towing at high
altitude on steep uphill grades,
the vehicle may show signs similar
to engine overheating. To avoid
this, let the engine run while
parked, preferably on level ground,
with the automatic transmission
in P (Park) for a few minutes
before turning the engine off.
Driving and Operating 8-51
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See this
manual’s Maintenance Schedule or
Index for more information. Things
that are especially important in trailer
operation are automatic transmission
fluid, engine oil, axle lubricant, belts,
cooling system and brake system.
It is a good idea to inspect these
before and during the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. SeeEngine Overheating
on page 9-24.
Trailer Towing
Before pulling a trailer, there are
three important considerations that
have to do with weight:
•The weight of the trailer.
•The weight of the trailer tongue.
•The total weight on your
vehicle’s tires.
Weight of the Trailer
How heavy can a trailer safely be?
It should never weigh more than
1,000 lbs (454 kg). But even
that can be too heavy.
It depends on how the rig is used.
For example, speed, altitude, road
grades, outside temperature and
how much the vehicle is used to pull
a trailer are all important. It candepend on any special equipment
on the vehicle, and the amount of
tongue weight the vehicle can carry.
See “Weight of the Trailer Tongue”
later in this section for more
information.
Maximum trailer weight is calculated
assuming only the driver is in the tow
vehicle and it has all the required
trailering equipment. The weight
of additional optional equipment,
passengers and cargo in the tow
vehicle must be subtracted from
the maximum trailer weight.
Ask your dealer/retailer for our
trailering information or advice, or
you can write us at our Customer
Assistance Offices. SeeCustomer
Assistance Offices on page 12-3
for more information.
Driving and Operating 8-53
Towing Equipment
Hitches
Use the correct hitch equipment.
See your dealer/retailer or a
hitch dealer for assistance.
•The rear bumper on the vehicle
is not intended for hitches.
Do not attach rental hitches
or other bumper-type hitches to
it. Use only a frame-mounted
hitch that does not attach to
the bumper.
•Will any holes be made in the
body of the vehicle when the
trailer hitch is installed? If there
are, seal the holes when the hitch
is removed. If the holes are not
sealed, dirt, water, and deadly
carbon monoxide (CO) from the
exhaust can get into the vehicle.
SeeEngine Exhaust on
page 8-25.
Safety Chains
Always attach chains between the
vehicle and the trailer. Cross the
safety chains under the tongue of
the trailer to help prevent the tongue
from contacting the road if it
becomes separated from the hitch.
Leave enough slack so the rig can
turn. Never allow safety chains to
drag on the ground.
Trailer Brakes
Does the trailer have its own
brakes? Be sure to read and follow
the instructions for the trailer brakes
so they are installed, adjusted and
maintained properly.
Because the vehicle has antilock
brakes, do not tap into the vehicle’s
brake system. If this is done,
both brake systems will not work
well, or at all.
Conversions and
Add-Ons
Add-On Electrical
Equipment
Notice:Do not add anything
electrical to the vehicle unless you
check with your dealer/retailer
rst. Some electrical equipment
can damage the vehicle and the
damage would not be covered
by the vehicle’s warranty. Some
add-on electrical equipment can
keep other components from
working as they should.
Add-on equipment can drain the
vehicle battery, even if the vehicle
is not operating.
The vehicle has an airbag system.
Before attempting to add anything
electrical to the vehicle, see
Servicing the Airbag-Equipped
Vehicle on page 2-32andAdding
Equipment to the Airbag-Equipped
Vehicle on page 2-33.
Driving and Operating 8-55