{WARNING
It is dangerous to get out of the
vehicle if the shift lever is not fully
in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the 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 the vehicle will
not move, even when you are on
fairly level ground, always set the
parking brake and move the shift
lever to P (Park). SeeShifting
Into Park on page 8-21.Ifyou
are pulling a trailer, seeDriving
Characteristics and Towing Tips
on page 8-49.
Make sure the shift lever is fully
in P (Park) before starting the
engine. The vehicle has an
automatic transmission shift lock
control system. The regular brakemust be fully applied first and then
the shift lever button pressed before
shifting from P (Park) when the
ignition key is in ON/RUN. If you
cannot shift out of P (Park), ease
pressure on the shift lever, then
push the shift lever all the way
into P (Park) as you maintain brake
application. Then press the shift
lever button and move the shift lever
into another gear. SeeShifting Out
of Park on page 8-22.
R (Reverse):Use this gear to
back up.
Notice:Shifting to R (Reverse)
while the vehicle is moving
forward could damage the
transmission. The repairs would
not be covered by the vehicle
warranty. Shift to R (Reverse)
only after the vehicle is stopped.
To rock the vehicle back and forth
to get out of snow, ice or sand
without damaging the transmission,
seeIf the Vehicle is Stuck on
page 8-11.N (Neutral):In this position, the
engine does not connect with the
wheels. To restart the engine when
the vehicle is already moving,
use N (Neutral) only. Also, use
N (Neutral) when the vehicle is
being towed.
{WARNING
Shifting into a drive gear while the
engine is running at high speed is
dangerous. Unless your foot is
firmly on the brake pedal, the
vehicle could move very rapidly.
You could lose control and hit
people or objects. Do not shift into
a drive gear while the engine is
running at high speed.
Notice:Shifting out of P (Park)
or N (Neutral) with the engine
running at high speed may
damage the transmission. The
repairs would not be covered by
the vehicle warranty. Be sure the
engine is not running at high
speed when shifting the vehicle.
Driving and Operating 8-27
Let us say the road is wet and you
are driving safely. Suddenly, an
animal jumps out in front of you.
You slam on the brakes and
continue braking. Here is what
happens with ABS:
A computer senses that the wheels
are slowing down. If one of the
wheels is about to stop rolling,
the computer will separately work
the brakes at each wheel.
ABS can change the brake pressure
to each wheel, as required, faster
than any driver could. This can
help the driver steer around
the obstacle while braking hard.
As the brakes are applied, the
computer keeps receiving updates
on wheel speed and controls braking
pressure accordingly.Remember: ABS does not change
the time needed to get a foot up to
the brake pedal or always decrease
stopping distance. If you get too
close to the vehicle in front of you,
there will not be enough time to
apply the brakes if that vehicle
suddenly slows or stops. Always
leave enough room up ahead to
stop, even with ABS.
Using ABS
Do not pump the brakes. Just hold
the brake pedal down firmly and let
antilock work. The antilock pump
or motor might be heard operating,
and the brake pedal might be felt to
pulsate, but this is normal.
Braking in Emergencies
ABS allows the driver to steer and
brake at the same time. In many
emergencies, steering can help
more than even the very best
braking.
Parking Brake
To apply the parking brake, pull
up on the parking brake handle.
It is not necessary to push in on
the release button while applying
the parking brake. If the ignition is
in the ON/RUN position, the brake
system warning light will come on.
SeeBrake System Warning Light
on page 4-22.
8-32 Driving and Operating
To release the parking brake:
1. Hold the brake pedal down.
2. Pull the parking brake handle up
until you can press the release
button.
3. Hold the release button in as you
move the brake handle all the
way down.
Notice:Driving with the parking
brake on can overheat the brake
system and cause premature wear
or damage to brake system parts.
Make sure that the parking brake
is fully released and the brake
warning light is off before driving.Driving with the parking brake
applied will cause a warning chime to
sound and the Park Brake message
to appear in the DIC. The message
will remain on until:
•the parking brake is released
•the vehicle comes to a stop.
If you are towing a trailer and you
are parking on a hill, seeDriving
Characteristics and Towing Tips
on page 8-49.
Brake Assist
This vehicle has a Brake Assist
feature designed to assist the driver
in stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brakecontrol module to supplement
the power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle.
The stability system hydraulic brake
control module increases brake
pressure at each corner of the
vehicle until the ABS activates.
Minor brake pedal pulsations or
pedal movement during this time
is normal and the driver should
continue to apply the brake pedal
as the driving situation dictates
The Brake Assist feature will
automatically disengage when the
brake pedal is released or brake
pedal pressure is quickly decreased.
Driving and Operating 8-33
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, seeEngine Overheating
on page 9-24.
Parking on Hills
{WARNING
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.
8-52 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 Cover.......................9-9
Engine Oil..........................9-10
Engine Oil Life System.........9-13
Automatic Transmission
Fluid................................9-14
Manual Transmission Fluid. . . .9-15
Hydraulic Clutch..................9-15
Engine Air Cleaner/Filter.......9-16
Cooling System...................9-17
Engine Coolant...................9-19
Engine Overheating.............9-24
Power Steering Fluid............9-25Washer Fluid......................9-26
Brakes...............................9-27
Brake Fluid.........................9-28
Battery...............................9-29
Rear Axle...........................9-30
Starter Switch Check............9-31
Automatic Transmission
Shift Lock Control
System Check...................9-32
Ignition Transmission
Lock Check.......................9-32
Park Brake and P (Park)
Mechanism Check..............9-32
Wiper Blade Replacement......9-33Headlamp AimingHeadlamp Aiming................9-34
Bulb ReplacementBulb Replacement...............9-37
Halogen Bulbs....................9-37
High Intensity Discharge
(HID) Lighting....................9-37
Headlamps, Front Turn
Signal and Parking Lamps
(Base Vehicle)...................9-37
Headlamps, Front Turn
Signal and Parking Lamps
(Up-Level Vehicle)..............9-38
Daytime Running
Lamps (DRL)....................9-39
Fog Lamps.........................9-40Taillamps, Turn Signal, and
Stoplamps.........................9-40
License Plate Lamp.............9-40
Replacement Bulbs..............9-41
Electrical SystemElectrical System
Overload...........................9-41
Fuses and Circuit
Breakers...........................9-42
Engine Compartment
Fuse Block.......................9-42
Instrument Panel
Fuse Block.......................9-45
Rear Compartment
Fuse Block.......................9-46
Wheels and TiresTires..................................9-48
Winter Tires........................9-48
Tire Sidewall Labeling..........9-49
Tire Designations.................9-51
Tire Terminology and
Definitions.........................9-52
Tire Pressure......................9-54
Tire Pressure for
High-Speed Operation........9-56
Tire Pressure Monitor
System.............................9-56
Tire Pressure Monitor
Operation..........................9-57
Tire Inspection....................9-61
Vehicle Care 9-1
What to Use
For 218 mm rear drive module
(RDM) V6 manual, V8 automatic
and V8 manual:
To add lubricant when the level
is low, use 75W-90 LS gear oil
(GM Part No. US 89021677
and 1052358, in Canada
Part No. 89021678 and 992694)
meeting GM Specification 9986226.
To completely refill after draining,
seeRecommended Fluids and
Lubricants on page 10-7. Then fill
to the bottom of the filler plug hole
with the Synthetic Gear Lubricant.
For 195 mm RDM V6 automatic:
To add lubricant when the level
is low, use 75W-90 gear Oil
(GM Part No. US 89021677,
in Canada Part No. 89021678)
meeting GM Specification 9986115.
To completely refill after draining,
seeRecommended Fluids and
Lubricants on page 10-7. Then fill
to the bottom of the filler plug hole
with the Synthetic Gear Lubricant.
Starter Switch Check
{WARNING
When you are doing this
inspection, the vehicle could move
suddenly. If the vehicle moves,
you or others could be injured.
1. Before starting this check,
be sure there is enough
room around the vehicle.
2. Firmly apply both the parking
brake and the regular brake.
SeeParking Brake on page 8-32.
Do not use the accelerator
pedal, and be ready to turn off
the engine immediately if it starts.3. For automatic transmission
vehicles, try to start the engine
in each gear. The vehicle
should start only in P (Park) or
N (Neutral). If the vehicle starts
in any other position, contact your
dealer/retailer for service.
For manual transmission
vehicles, put the shift lever in
Neutral, push the clutch pedal
down halfway, and try to start the
engine. The vehicle should start
only when the clutch pedal is
pushed down all the way to the
floor. If the vehicle starts when
the clutch pedal is not pushed
all the way down, contact your
dealer/retailer for service.
Vehicle Care 9-31
Automatic Transmission
Shift Lock Control
System Check
{WARNING
When you are doing this
inspection, the vehicle could move
suddenly. If the vehicle moves,
you or others could be injured.
1. Before starting this check, be
sure there is enough room
around the vehicle. It should
be parked on a level surface.
2. Firmly apply the parking brake.
SeeParking Brake on page 8-32.
Be ready to apply the regular
brake immediately if the vehicle
begins to move.3. With the engine off, turn the
ignition to ON/RUN, but do
not start the engine. Without
applying the regular brake,
try to move the shift lever out
of P (Park) with normal effort.
If the shift lever moves out
of P (Park), contact your
dealer/retailer for service.
Ignition Transmission
Lock Check
While parked, and with the parking
brake set, try to turn the ignition
to LOCK/OFF in each shift lever
position.
•The ignition should turn to
LOCK/OFF only when the
shift lever is in P (Park).
•The ignition key should come out
only in LOCK/OFF.
Contact your dealer/retailer if
service is required.
Park Brake and P (Park)
Mechanism Check
{WARNING
When you are doing this check,
the vehicle could begin to move.
You or others could be injured
and property could be damaged.
Make sure there is room in front
of the vehicle in case it begins to
roll. Be ready to apply the regular
brake at once should the vehicle
begin to move.
9-32 Vehicle Care
Park on a fairly steep hill, with the
vehicle facing downhill. Keeping
your foot on the regular brake,
set the parking brake.
•To check the parking brake’s
holding ability: With the engine
running and the transmission
in N (Neutral), slowly remove
foot pressure from the regular
brake pedal. Do this until
the vehicle is held by the
parking brake only.
•To check the P (Park)
mechanism’s holding ability:
With the engine running, shift
to P (Park). Then release the
parking brake followed by the
regular brake.
Contact your dealer/retailer if
service is required.
Wiper Blade
Replacement
Windshield wiper blades should be
inspected for wear and cracking.
SeeScheduled Maintenance on
page 10-2for more information.
Replacement blades come in
different types and are removed
in different ways. For proper type
and length, seeMaintenance
Replacement Parts on page 10-9.To replace the windshield wiper
blade:
1. Pull the windshield wiper
assembly away from the
windshield.
2. Lift up on the latch in the middle
of the wiper blade where the
wiper arm attaches.
Vehicle Care 9-33