wheel torque CHEVROLET EXPRESS 1998 1.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine I A CAUTION:
Shifting out of PARK (P) or NEUTRAL (N) while
your engine is “racing” (running at high speed) is dangerous. Unless your foot is firmly on the
brake pedal, your vehicle could move very
rapidly. You could lose control and hit people or
objects. Don’t shift out of PARK
(P) or
NEUTRAL
(N) while your engine is racing.
NOTICE:
Damage to your transmission caused by shifting
out
of PARK (P) or NEUTRAL (N) with the
engine racing isn’t covered by your warranty.
DRIVE (D):
This position is for normal driving. If you
need more power for passing, and you’re:
Going less than about 35 mph (55 km/h), push your
accelerator pedal about halfway down.
Going about 35 mph (55 kmh) or more, push the
You’ll shift down to the next gear and have
more power.
You should use DRIVE (D) (or, as you need to, a lower
gear) when towing a trailer
to minimize heat build-up
and extend the life
of your transmission.
THIRD (3): This position is also used for normal
driving, however, it offers more power and lower fuel
economy than DRIVE
(D). You should use THIRD (3)
when carrying a heavy load or driving on steep hills.
SECOND (2): This position gives you more power but
lower fuel economy. You can use SECOND (2) on hills.
It can help control your speed as
you go down steep
mountain roads, but then you would also want to
use
your brakes off and on. If you manually select
SECOND
(2), the transmission will drive in
SECOND
(2). You may use this feature for reducing
torque
to the rear wheels when you are trying to start
your vehicle from a stop
on slippery road surfaces.
FIRST (1): This position gives you even more power
(but lower fuel economy) than SECOND
(2). You can
use it
on very steep hills, or in deep snow or mud. If
the selector lever
is put in FIRST( 1 ), the transmission
won’t shift into first gear until the vehicle is going
slowly enough.
accelerator
all the way down.

Downloaded from www.Manualslib.com manuals search engine /1 CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to become 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
140 lb-ft (190 Nmm).
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 specification. Put the wheel
cover back on, if
you have one.
Remove any wheel blocks.
Remember that the jack, jacking equipment and tire
must be properly stored
in their original storage
position before
you begin driving again. The next
part will show
you how.
Storing a Flat or Spare Tire and Tools
A CAUTION:
Storing a jack, a tire or other equipment in the
passenger compartment of the vehicle could
cause injury. In a sudden stop or collision, loose
equipment could strike someone. Store all these
in the proper place.
1. Put the tire on the ground at the rear of the vehicle,
with the valve stem pointed down.
5-33

Downloaded from www.Manualslib.com manuals search engine Brake Wear
Your vehicle has front disc brakes and rear drum 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 firmly).
r
I
The brake wear warning sound means that soon
your brakes won’t work well. That could lead to
an accident. When you hear the brake wear
warning sound, have your vehicle serviced.
I 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 first 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 torque wheel nuts in
the proper sequence
to GM specifications.
Your rear drum brakes don’t have wear indicators, but
if you ever hear a rear brake rubbing noise, have the
rear brake linings inspected immediately. Also, the rear
brake drums should be removed and inspected each time
the tires are removed for rotation or changing. When
you have the front brake pads replaced, have the rear
brakes inspected, too.
Brake linings should always be replaced as complete
axle sets.
See “Brake System Inspection’’ in Section
7 of this
manual under Part
C “Periodic Maintenance Inspections.’’
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there
is a rapid increase in pedal
travel.
This could be a sign of brake trouble.

Downloaded from www.Manualslib.com manuals search engine If your vehicle has dual rear wheels, always use one of
the correct rotation patterns shown here when rotating
your tires.
When you install dual wheels, be sure the vent holes in
the inner and outer wheels on each side are lined up.
After the tires have been rotated, adjust the front
and rear inflation pressures
as shown on the
Certificationflire label. Make certain
that all wheel
nuts are properly tightened. See “Wheel Nut Torque’’
in the Index.
A 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
“Changing
a Flat Tire” in the Index.)
6-44

Downloaded from www.Manualslib.com manuals search engine When It’s 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.
You need
a new tire if any of the following statements
are true:
You can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the
tire’s rubber.
The tire has a bump, bulge or split.
The tire has a puncture, cut or other damage that
can’t be repaired well because of the size or location
of the damage.
Dual Tire Operation
When the vehicle is new, or whenever a wheel, wheel
bolt or wheel nut is replaced, check the wheel nut
torque after
100, 1,000 and 6,000 miles (160, 1 600 and
10 000 km) of driving. For proper torque, see “Wheel
Nut Torque” in the Index.
The outer tire on
a dual wheel setup generally wears
faster than the inner tire. Your tires will wear more
evenly and last longer if you rotate the tires periodically.
If you’re going to be doing a lot of driving on
high-crown roads, you can reduce tire wear by adding
5 psi (35 kPa) to the tire pressure in the outer tires. Be
sure to return
to the recommended pressures when no
longer driving under those conditions. See “Changing a
Flat Tire”
in the Index for more information.
0 The tread or sidewall is cracked, cut or snagged deep
enough
to show cord or fabric.
6-45
__

Downloaded from www.Manualslib.com manuals search engine Whenever a wheel, wheel bolt or wheel nut is replaced
on
a dual wheel setup, check the wheel nut torque after
100, 1,000 and 6,000 miles ( 160, 1 600 and 10 000 km)
of driving. For proper torque, see “Wheel Nut Torque’’
in the Index.
See “Changing
a Flat Tire” in the Index for more
information.
Used Replacement Wheels
Putting a used wheel on your vehicle is
dangerous. You can’t know how it’s been used or
how
far it’s been driven. It could fail suddenly
and cause an accident. If you have to replace
a
wheel, use a new GM original equipment wheel.
NOTICE:
Use tire chains only where legal and only when you
must. Use chains that are the proper size for your
tires. Install them on the tires of the rear axle.
Tighten them as tightly as possible with the ends
securely fastened. Drive slowly and follow the
chain manufacturer’s instructions. If you can
hear the chains contacting your vehicle, stop
and retighten them.
If the contact continues,
slow down until it stops. Driving too fast
or
spinning the wheels with chains on will
damage your vehicle.
6-50

Downloaded from www.Manualslib.com manuals search engine Capacities and Specifications
Replacement Parts
Replacement part numbers listed in this section are based on the latest information available at the time of printing,
and are subject to change. If a part listed in this manual is not the same as the part used
in your vehicle when it was
built, or
if you have any questions, please contact your GM dealer.
These specifications are for information only. If you have any questions, see the service manual for the chassis or
refer to the body manufacturer’s publications.
Engine Identification -- Gasoline Engines
Engine “VORTEC” 4300 “VORTEC” 5000
Type V6 V8
VIN Code w M
Fuel System CSFI’ CSFI 1
lCentra1 Sequential Fuel Injection
2Sequential Fuel Injection
Wheel Nut Torque
MODEL TORQUE
All 140 ft-lb (190 Nem)
“VORTEC” 5700
V8
R
CSFI’
“VORTEC” 7400
V8
J
SFI~

Downloaded from www.Manualslib.com manuals search engine Part B: Ownc Tlhecks and Scvices
Listed below are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance
of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part
D.
At the First 100, 1,000 and 6,000 Miles
(160,1600 and
10 000 km)
For vehicles with dual wheels, check dual wheel nut
torque.
For proper torque, see “Wheel Nut Torque” in
the Index.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL@
coolant mixture if necessary. See “Engine Coolant” in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid
if
necessary. See “Windshield Washer Fluid” in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures. See
“Tires” in the Index for further details.
At Each Fuel Fill
It is important for you or n service station attendant to
pet$orm these underhood checks at each fitel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See “Engine Oil”
in the Index for
further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See “Audio Systems” in the
Index for further details.
7-38

Downloaded from www.Manualslib.com manuals search engine TorqueLock ................................... 2-27
Torque. Wheel Nut
......................... 5.33. 6.67
Towing a Trailer
................................ 4-28
Towing Your Vehicle
............................. 5-8
Trailer
Brakes
..................................... 4-33
Driving on Grades
............................ 4-35
Drivingwith
................................. 4-33
Hitches
..................................... 4-32
Maintenance When Towing
..................... 4-36
Parking on Hills
.............................. 4-36
Safety Chains
................................ 4-33
Tongueweight
............................... 4-31
Total Weight on Tires
.......................... 4-32
Towing
..................................... 4-28
Turnsignals
................................. 4-35
Weight
..................................... 4-30
Wiring Harness
............................... 4-37
Transmission Fluid. Automatic
.................... 6- 17
Transmitters. Keyless Entry
........................ 2-6
Transportation. Courtesy
.......................... 8-8
Trip Odometer ................................. 2-52
TTYUsers
..................................... 8-4
Turn Signal and Lane Change Signals
............... 2-35
Turn SignalNultifunction Lever
................... 2-34
Turn Signals When Towing a Trailer
................ 4-35
Underbody Maintenance
........................ 6-58
UnderhoodLamp
............................... 2-44 Vehicle
Control
...................................... 4-5
Damage Warnings
.............................. iv
Identification Number ......................... 6-60
Loading
.................................... 4-27
Storage
..................................... 6-31
Ventilation System
............................... 3-6
Visor Vanity Mirrors
............................ 2-49
Visors. Sun
.................................... 2-49
warning Devices
............................... 5-2
Warning Lights. Gages and Indicators
............... 2-53
Washer Fluid. Windshield
........................ 6-26
Weatherstrips
.................................. 6-54
Wheel Alignment
.................................. 6-48
Nut Torque ............................. 5-33. 6.67
Replacement
................................. 6-49
Wrench
..................................... 5-24
Windows
..................................... 2-31
Power
...................................... 2-31
SideLatches
................................. 2-32
Swing-Out
.................................. 2-32
Windshield Washer
............................. 2-37
Fluid
....................................... 6-26
Fluid Level Check
............................ 7-38
Washing Your Vehicle
........................... 6-55