wheel torque CHEVROLET SUBURBAN 2003 9.G Owners Manual

G(4HI):Use the 4HI position when you need extra
traction, such as on snowy or icy roads or in most
off-road situations. This setting also engages your front
axle to help drive your vehicle. This is the best setting
to use when plowing snow.
5(4LO):This setting also engages your front axle
and delivers extra torque. You may never need this
setting. It sends maximum power to all four wheels. You
might choose 4LO if you are driving off-road in deep
sand, deep mud, deep snow and climbing or descending
steep hills.
{CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. See
Parking Brake on
page 2-38
.NEUTRAL:Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-59orTowing
Your Vehicle on page 4-59for more information.
Indicator lights in the switches show which setting you
are in. The indicator lights will come on brie¯y when you
turn on the ignition and one will stay on. If the lights
do not come on, you should take your vehicle to your
dealer for service. An indicator light will ¯ash while
shifting the transfer case. It will remain illuminated when
the shift is complete. If for some reason the transfer
case cannot make a requested shift, it will return to the
last chosen setting.
If the SERVICE 4WD message stays on, you should
take your vehicle to your dealer for service. See²Service
4WD message²under
Driver Information Center (DIC)
on page 3-53.
2-31

You can choose among three driving settings:
d(Stabilitrakž):This button is used with the
Stabilitrakžsystem and is also used to shift the transfer
case into Neutral. For more information on using
Stabilitrak
žseeStabilitrakžSystem on page 4-12.
f(All-Wheel Drive):This setting delivers power to
all four wheels as needed depending on road and driving
conditions.
g(4LO):This setting delivers extra torque. You may
never need this setting. It sends maximum power to
all four wheels. You might choose 4LO if you are driving
off-road in deep sand, deep mud, deep snow and
climbing or descending steep hills.
{CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. See
Parking Brake on
page 2-38
.NEUTRAL:Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-59orTowing
Your Vehicle on page 4-59for more information.
Indicator lights in the switches show which setting you are
in. The indicator lights will come on brie¯y when you turn
on the ignition and one will stay on. If the lights do not
come on, you should take your vehicle to your dealer for
service. An indicator light will ¯ash while shifting the
transfer case. It will remain illuminated when the shift is
complete. If for some reason the transfer case cannot
make a requested shift, it will return to the last chosen
setting.
If the SERVICE 4WD message stays on, you should
take your vehicle to your dealer for service. See
SERVICE 4WD under
Driver Information Center (DIC)
on page 3-53.
2-35

Notice:
·Using the wrong ¯uid can badly damage brake
system parts. For example, just a few drops of
mineral-based oil, such as engine oil, in your
brake system can damage brake system parts so
badly that they will have to be replaced. Do not
let someone put in the wrong kind of ¯uid.
·If you spill brake ¯uid on your vehicle's painted
surfaces, the paint ®nish can be damaged. Be
careful not to spill brake ¯uid on your vehicle. If
you do, wash it off immediately. See
Appearance
Care on page 5-99.
Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads
are worn and new pads are needed. The sound
may come and go or be heard all the time your vehicle
is moving (except when you are pushing on the
brake pedal ®rmly).
{CAUTION:
The brake wear warning sound means that
soon your brakes will not work well. That
could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates may cause a brake
squeal when the brakes are ®rst applied or lightly
applied. This does not mean something is wrong with
your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts in
the proper sequence to GM torque speci®cations.
Brake linings should always be replaced as complete
axle sets.
See
Brake System Inspection on page 6-17.
5-47

After the tires have been rotated, adjust the front and
rear in¯ation pressures as shown on the
Certi®cation/Tire label. Make certain that all wheel nuts
are properly tightened. See ªWheel Nut Torqueº
under
Capacities and Speci®cations on page 5-118.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel could
come off and cause an accident. When you
change a wheel, remove any rust or dirt from
places where the wheel attaches to the vehicle.
In an emergency, you can use a cloth or a
paper towel to do this; but be sure to use a
scraper or wire brush later, if you need to, to
get all the rust or dirt off. See ªChanging a Flat
Tireº in the Index.
When It Is Time for New Tires
One way to tell when it's
time for new tires is to
check the treadwear
indicators, which will
appear when your tires
have only 1/16 inch
(1.6 mm) or less of tread
remaining. Some
commercial truck tires may
not have treadwear
indicators.
5-70

{CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to come loose
and even come off. This could lead to an
accident. Be sure to use the correct wheel
nuts. If you have to replace them, be sure to
get new GM original equipment wheel nuts.
Stop somewhere as soon as you can and have
the nuts tightened with a torque wrench to the
proper torque speci®cation. See ªCapacities
and Speci®cationsº in the Index for wheel nut
torque speci®cation.
Notice:Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque speci®cation. See ªCapacities and
Speci®cationsº in the index for the wheel nut torque
speci®cation.
When you reinstall the regular wheel and tire, you must
also reinstall the center cap. Place the cap on the wheel
and tap it into place until it seats ¯ush with the wheel. The
cap only goes on one way. Be sure to line up the tab on
the center cap with the indentation on the wheel.
5-89

Capacities and Speci®cations
Please refer toPart D: Recommended Fluids and Lubricants on page 6-18for more information. All capacities are
approximate.
Capacities and Speci®cations
Engine Type VIN Code Spark Plug Gap
VORTECŸ 4800 V8 V8 V 0.060 inches (1.52 mm)
VORTECŸ 5300 V8 V8 T 0.060 inches (1.52 mm)
VORTECŸ 5300 V8 V8 Z 0.060 inches (1.52 mm)
VORTECŸ 6000 V8 V8 U 0.060 inches (1.52 mm)
VORTECŸ 8100 V8 V8 G 0.060 inches (1.52 mm)
Wheels and Tires
Model Description Torque
C/K 1500 6 bolts (14 mm) 140 lb ft (190Y)
C/K 2500 8 bolts (14 mm) 140 lb ft (190Y)
Tire PressureSee the Certi®cation/Tire label on the rear edge of the driver's door or the
incomplete vehicle document in the cab.
5-118

Torque Lock...................................................2-41
Total Weight on Your Vehicle's Tires..................4-71
Tow/Haul Mode Light.......................................3-52
Tow/Haul Mode...............................................2-29
Towing..........................................................4-59
Recreational Vehicle.....................................4-59
Towing a Trailer..........................................4-65
Your Vehicle...............................................4-59
TRACTION ACTIVE........................................3-71
Traction Control Operation................................4-13
TRACTION SYS LIMITED................................3-71
Traction.........................................................4-10
Assist System (TAS)....................................4-10
Off Light.....................................................3-44
Stabilitrak
žSystem......................................4-12
Trailer Brakes.................................................4-73
Trailer Wiring Harness.....................................4-77
Trailer...........................................................4-65
Recommendations.......................................4-65
Transfer Case and Front Axle (Four-Wheel Drive)
Inspection...................................................6-17
Transfer Case........................................5-55, 5-57
TRANSMISSION HOT.....................................3-71
Transmission Operation, Automatic....................2-26
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-11Transmission..................................................5-26
Fluid, Automatic...........................................5-26
Temperature Gage.......................................3-46
Transportation Options...................................... 7-8
Traveling to Remote Areas...............................4-27
Trip Information Button....................................3-54
Trip Odometer................................................3-38
Turn and Lane-Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-71
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-75U
Underbody Flushing Service.............................6-15
Underhood Fuse Block...................................5-113
Understanding Radio Reception.......................3-127
Uniform Tire Quality Grading............................5-72
United States ± Customer Assistance.................. 7-5
Used Replacement Wheels..............................5-75
Using Cleaner on Fabric................................5-100
Using HomeLink
ž...........................................2-60
Using Song List Mode...................................3-112
Using the Recovery Hooks...............................4-57
18