•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.
•Use the Sport Shift mode and the
cruise control when towing.
•Obey speed limit restrictions
when towing a trailer. Do not drive
faster than the maximum posted
speed for trailers, or no more than
90 km/h (55 mph), to save wear
on the vehicle’s parts.
Driving with a Trailer
Towing a trailer requires a certain
amount of experience. Get to know
the rig before setting out for the open
road. Get acquainted with the feel of
handling and braking with the added
weight of the trailer. And always keep
in mind that the vehicle you are
driving is now longer and not as
responsive as the vehicle is by itself.Before starting, check all trailer
hitch parts and attachments, safety
chains, electrical connectors, lamps,
tires and mirror adjustments. If the
trailer has electric brakes, start the
vehicle and trailer moving and then
apply the trailer brake controller by
hand to be sure the brakes are
working. This checks the electrical
connection at the same time.
During the trip, check occasionally
to be sure that the load is secure,
and that the lamps and any
trailer brakes are still working.
Towing with StabiliTrak
When towing, the sound of the
StabiliTrak modulator might
be heard. StabiliTrak is reacting to
the vehicle movement caused
by the trailer, which mainly occurs
during cornering. This is normal
when towing heavier trailers.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving the vehicle without a trailer.
This can help to avoid situations that
require heavy braking and sudden
turns.
Passing
More passing distance is needed
when towing a trailer. Because the
rig is longer, it is necessary to go
much farther beyond the passed
vehicle before returning to the lane.
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.
Driving and Operating 8-45
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. For vehicles with manual
transmissions, let the engine run
while parked, preferably on level
ground, with the transmission out of
gear and the parking brake applied,
for a few minutes before turning the
engine off. If the overheat warning
comes on, see
Engine Overheating
on page 9-23.
8-46 Driving and Operating
Parking on Hills
{CAUTION
Parking the vehicle on a hill with
the trailer attached can be
dangerous. If something goes
wrong, the rig could start to move.
People can be injured, and both
the vehicle and the trailer can be
damaged. When possible, always
park the rig on a flat surface.
If parking the rig on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet for vehicles
with an automatic transmission,
or into gear for vehicles with a
manual transmission. Turn the
wheels into the curb if facing
downhill or into traffic if facing
uphill.
2. Have someone place chocks under the trailer wheels. 3. When the wheel chocks are in
place, release the brake pedal
until the chocks absorb the load.
4. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park) for vehicles
with an automatic transmission
or into gear for vehicles with
a manual transmission.
5. Release the brake pedal.
Leaving After Parking on
a Hill
1. Apply and hold the brake pedal while you:
•start the engine,
•shift into a gear, and
•release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
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. See Engine Overheating
on page 9-23.
Driving and Operating 8-47
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 anti-lock
brakes, do not tap into the vehicle’s
brake system. If you do, both brake
systems will not work well, or at all.
Trailer Wiring Harness
All of the electrical circuits required
for the trailer lighting system can be
accessed at the driver’s side rear
lamp connector. This connector is
located under the carpet at the rear
corner of the cargo compartment.
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 2-34
.
8-50 Driving and Operating
Vehicle Care
General InformationGeneral Information..............
.9-2
California Proposition 65 Warning ........................
.9-2
California Perchlorate Materials Requirements ........9-3
Accessories and Modifications ......................
.9-3
Vehicle ChecksDoing Your Own
Service Work .....................
.9-4
Hood ..................................
.9-5
Engine Compartment Overview ...........................
.9-6
Engine Oil ...........................
.9-9
Automatic Transmission Fluid ...............................
.9-12
Manual Transmission Fluid . . . .9-14
Hydraulic Clutch .................
.9-15
Engine Air Cleaner/Filter .......9-16
Cooling System ..................
.9-19
Engine Coolant ..................
.9-19Engine Overheating
.............9-23
Power Steering Fluid ............9-24
Washer Fluid .....................
.9-24
Brakes ..............................
.9-26
Brake Fluid ........................
.9-27
Battery ..............................
.9-28
All-Wheel Drive ..................
.9-29
Starter Switch Check ............9-30
Wiper Blade Replacement .....9-30
Headlamp AimingHeadlamp Aiming...............
.9-32
Bulb ReplacementBulb Replacement ..............
.9-33
Halogen Bulbs ...................
.9-33
Headlamps and Parking Lamps .............................
.9-33
Taillamps ...........................
.9-35
License Plate Lamp .............9-36
Replacement Bulbs .............
.9-37
Electrical SystemElectrical System Overload . . . .9-37
Fuses and Circuit Breakers . . .9-38
Engine Compartment Fuse Block ..............................
.9-38
Instrument Panel Fuse Block ..............................
.9-41
Wheels and TiresTires.................................
.9-43
Tire Sidewall Labeling ..........9-44
Tire Designations ................
.9-46
Tire Terminology and Definitions ........................
.9-46
Tire Pressure .....................
.9-49
Tire Pressure Monitor System ............................
.9-50
Tire Pressure Monitor Operation .........................
.9-52
Tire Inspection ...................
.9-54
Tire Rotation ......................
.9-55
When It Is Time for New Tires ...............................
.9-56
Buying New Tires ...............
.9-56
Different Size Tires and Wheels ............................
.9-58
Uniform Tire Quality Grading ...........................
.9-58
Wheel Alignment and Tire Balance ...........................
.9-60
Wheel Replacement .............9-60
Tire Chains ........................
.9-61
If a Tire Goes Flat ..............
.9-62
Tire Changing ....................
.9-63
Compact Spare Tire .............9-68
Vehicle Care 9-1
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag
initiators, seat belt pretensioners,
and lithium batteries contained
in remote keyless transmitters,
may contain perchlorate materials.
Special handling may be necessary.
For additional information, see
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modi cations
When non-dealer/non-retailer
accessories are added to the vehicle,
they can affect vehicle performance
and safety, including such things
as airbags, braking, stability, ride
and handling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. Some of these accessories
could even cause malfunction or
damage not covered by the vehicle
warranty.Damage to vehicle components
resulting from the installation or use
of non-GM certified parts, including
control module modifications, are
not covered under the terms of the
vehicle warranty and may affect
remaining warranty coverage for
affected parts.
GM Accessories are designed
to complement and function with
other systems on the vehicle.
Your GM dealer/retailer can
accessorize the vehicle using
genuine GM Accessories.
Vehicle Care 9-3
A. Engine Oil Dipstick. See″Checking Engine Oil ″under
Engine Oil on page 9-9 .
B. Engine Coolant on page 9-19 .
C. Washer Fluid on page 9-24 .
D. Coolant Recovery Tank. See Engine Coolant on
page 9-19.
E. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine
Oil on page 9-9.
F. Engine Air Cleaner/Filter on
page 9-16. G.
Brakes on page 9-26 and
Hydraulic Clutch on page 9-15
(If Equipped).
H. Engine Compartment Fuse Block.
I. Battery on page 9-28 .
J. Remote Positive (+) Terminal. See Jump Starting.
K. Automatic Transmission Fluid Dipstick. See ″Checking the
Fluid Level″ underAutomatic
Transmission Fluid on page 9-12
(If Equipped) (Out of View).
Vehicle Care 9-7
A. Engine Oil Dipstick. See“Checking Engine Oil” under
Engine Oil on page 9-9 .
B. Engine Coolant on page 9-19 .
C. Washer Fluid on page 9-24 .
D. Coolant Recovery Tank. See Engine Coolant on
page 9-19.
E. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine
Oil on page 9-9.
F. Brakes on page 9-26 and
Hydraulic Clutch on page 9-15
(If Equipped). G.
Engine Air Cleaner/Filter on
page 9-16.
H. Engine Compartment Fuse Block.
I. Battery on page 9-28 .
J. Remote Positive (+) Terminal. See Jump Starting.
K. Automatic Transmission Fluid Dipstick. See ″Checking the
Fluid Level″ underAutomatic
Transmission Fluid on page 9-12
(If Equipped) (Out of View).Engine Oil
Checking Engine Oil
It is a good idea to check the
engine oil level at each fuel fill.
In order to get an accurate reading,
the oil must be warm and the
vehicle must be on level ground.
The engine oil dipstick handle
is a yellow loop. See Engine
Compartment Overview on page 9-6
for the location of the engine oil
dipstick.
1. Turn off the engine and give the oil several minutes to drain back
into the oil pan. If this is not done,
the oil dipstick might not show the
actual level.
2. Pull out the dipstick and clean it with a paper towel or cloth,
then push it back in all the way.
Remove it again, keeping the tip
down, and check the level.
Vehicle Care 9-9