Tire spec CHEVROLET ASTRO 1997 2.G User Guide

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.
The tire has a bump, bulge or split.
0 The tire has a puncture, cut or other damage that
can’t be repaired well because of the size or location
of the damage.
Buying New Tires
To find out what kind and size of tires you need, look at
the Certificationrnire label.
You need
a new tire if any of the following statements
are true:
0 You can see the indicators at three or more places
around the tire.
0 You can see cord or fabric showing through the tire’s
rubber.
The tread or sidewall is cracked, cut or snagged deep
enough to show cord or fabric. The tires installed
on your vehicle when
it was new had
a Tire Performance Criteria Specification (TPC Spec)
number on each tire’s sidewall. When
you get new tires,
get ones with that same TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling,
speed rating,
traction, ride and other things during normal service on
your vehicle.
If your tires have an all-season tread
design, the TPC number will be followed by an
“MS”
(for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are
the same size,
load range, speed rating and construction type (bias,
bias-belted or radial)
as your original tires.
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Downloaded from www.Manualslib.com manuals search engine 1 /r CAUTION:
Mixing tires could cause you to lose control while
driving. If you mix tires of different sizes or types
(radial and bias-belted tires), the vehicle
may not
handle properly, and you could have
a crash.
Using tires of different sizes may also cause
damage to your vehicle. Be sure to use the
same size and type tires on
all wheels.
It’s all right to drive with your compact spare, though.
It was developed for use on your vehicle.
Uniform Tire Quality Grading
The following information relates to the system
developed
by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance. (This
applies only to vehicles sold in
the United States.) The
grades are molded
on the sidewalls of most passenger car
tires. The Uniform Tire Quality Grading system
does
not apply to deep tread, winter-type snow tires,
space-saver
or temporary use spare tires, tires with
nominal rim diameters
of 10 to 12 inches (25 to 30 cm),
or to some limited-production tires.
While the tires available
on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to Federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions
on a specified government test course. For
example, a tire graded 150 would wear one and a half
(1 1/2) times as well on the government course as a tire
graded
100. The relative performance of tires depends
upon the actual conditions of their use, however, and
may depart significantly from the norm due to variations
in driving habits, service practices and differences in
road characteristics and climate.
6-47

Downloaded from www.Manualslib.com manuals search engine Traction -- A, B, C
The traction grades, from highest to lowest, are A, €3, and
C, and they represent the tire’s ability to stop on wet
pavement as measured under controlled conditions on
specified government test surfaces
of asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based
on braking (straightahead) traction tests and does not
include cornering (turning) traction.
Temperature -- A, B, C
The temperature grades are A (the highest), B, and C,
representing the tire’s resistance to the generation of
heat and
its ability to dissipate heat when tested under
controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the
material of the tire to degenerate and reduce tire life, and
excessive temperature can lead to sudden tire failure.
The grade
C corresponds to a level of performance
which all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher levels of performance
on
the laboratory test wheel than the minimum
required by law.
Warning: The temperature grade for this tire is
established for a tire that is properly inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are not
needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving
on a smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace
it (except some aluminum
wheels, which can sometimes be repaired). See your
GM dealer if any
of these conditions exist.
Your dealer will know the kind of wheel you need.
6-48

Downloaded from www.Manualslib.com manuals search engine Protecting Exterior Bright Metal Parts
Bright metal parts should be cleaned regularly to keep
their luster. Washing with water is all that is usually
needed. However,
you may use chrome polish on
chrome or stainless steel trim, if necessary.
Use special care with aluminum trim.
To avoid damaging
protective trim, never use auto or chrome polish, steam or
caustic soap
to clean aluminum. A coating of wax, rubbed
to high polish, is recommended for all bright metal
parts.
Aluminum Wheels (If Equipped)
Keep your wheels clean using a soft clean cloth with
mild soap and water. Rinse with clean water. After
rinsing thoroughly, dry with
a soft clean towel. A wax
may then be applied.
The surface
of these wheels is similar to the painted
surface
of your vehicle. Don’t use strong soaps, chemicals,
abrasive polishes, abrasive cleaners or abrasive cleaning
brushes
on them because you could damage the surface.
Don’t take your vehicle through an automatic car wash
that has silicon carbide tire cleaning brushes. These
brushes can also damage the surface
of these wheels.
Cleaning Tires
To clean your tires, use a stiff brush with a tire cleaner.
NOTICE:
When applying a tire dressing always take care to
wipe off any overspray or splash from all painted
surfaces on the body or wheels
of the vehicle.
Petroleum-based products may damage the
paint finish.
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal
repair or replacement, make sure the body repair shop
applies anti-corrosion material
to the parts repaired or
replaced to restore corrosion protection.
6-57

Downloaded from www.Manualslib.com manuals search engine Replacement Bulbs
Exterior Lamps Quantity Trade No.
Halogen Headlamps - 2 H6054
Sealed Beam
Halogen Headlamps
-
Composite
2 9006 (Low Beam)
Halogen Headlamps
-
Composite Parking, Turn
Signal Lamps
Rear, Stoplamps
Sidemarker Lamps
Back-up Lamps 2
2
2
4
2
9005 (High Beam)
3 157NA
2057
194
1156
Capacities and Specifications
All capacities are approximate. English and metric
conversions are given.
Please refer to “Recommended Fluids and Lubricants”
in the Index for more information.
Engine Specifications
Engine ............... “VORTEC” 4300 V6 SFI*
RPO ................................... L35
Firing Order ...................... 1-6-5-4-3-2
Horsepower
................... 190 at 4,400 rpm
Thermostat Specification
........... 195 “F (9 1 “C)
*Sequential Fuel Injection
Wheel Nut Torque
Base or Optional Wheel ....... 100 lb-ft (140 N-m)
Tire Pressures
......... See “Loading Your Vehicle”
in the Index.
Cooling System Capacity
Quantity”
without Rear Heater
13.5 quarts (12.8 L)
Quantity*
with Rear Heater
16.5 quarts (15.5 L)
After refill, the level
must be checked.
6-66

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Short Trip/City Definition
Follow the Short TripKity Maintenance Schedule if any
one of these conditions is true for your vehicle:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving in stop-and-go traffic).
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top of
If the vehicle is used for delivery service, police, taxi
One of the reasons ~OLI should,follow this schedule ifyou
operate your vehicle under any of these conditions is thnt
these conditions
cause engine oil to brenk down sooneK
your vehicle.
or other commercial application.
I
Short TripKity Intervals
Every 3,000 Miles (5 000 km): Engine Oil and Filter
Change (or
3 months, whichever occurs first). Chassis
Lubrication (or
3 months, whichever occurs first). Drive
Axle Service (or 3 months, whichever occurs first).
Short Trip/City Intervals -
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Air Cleaner Filter
Inspection, if driving in dusty conditions. Front
Wheel Bearing Repack (2WD only) (or at each brake
relining, whichever occurs first). Automatic
Transmission Service (severe conditions
only).
Every 30,000 Miles (50 000 km): Air Cleaner Filter
Replacement.
Fuel Filter Replacement. Automatic
Transmission Service (normal conditions).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and
Lines Inspection.
Inspection. Spark Plug Replacement. Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every
60 months, whichever occurs first).
These intervnls only sunznznrize muintenance services.
Be sure to follow the comnplete rnainterzance schedule
on the followkg pages.
Every 100,000 Miles (166 000 km): Spark Plug Wire
7-5

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Follow this maintenance schedule only if none of
the conditions from the Short TripKity Maintenance
Schedule is true.
Do not use this schedule if the vehicle
is used for trailer towing, driven in a dusty area or used
off paved roads. Use the Short TripKity schedule for
these conditions.
Driving a vehicle with a fully warmed engine under
highway conditions causes engine oil to break
down slower:
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every
I2 months, whichever occurs first).
Chassis Lubrication (or every
12 months, whichever
occurs first). Drive Axle Service. Tire Rotation.
Transmission Service (severe conditions
only).
Replacement. Air Cleaner Filter Replacement. Front
Wheel Bearing Repack
(2WD only) (or at each brake
relining, whichever occurs first). Automatic
Transmission Service (normal conditions).
Drive Belt Inspection. Fuel Tank, Cap and Lines Inspection.
Inspection. Spark Plug Replacement. Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every
60 months, whichever occurs first).
These intervals only summarize rncrintenance services.
Be sure
to follow the complete maintenance schedule
on the following pages.
Every 15,000 Miles (25 000 km): Automatic
Every 30,000 Miles (50 000 km): Fuel Filter
Every 60,000 Miles (100 000 km): Engine Accessory
Every 100,000 Miles (166 000 km): Spark Plug Wire
7-6

Downloaded from www.Manualslib.com manuals search engine Short TripKity Maintenance Schedule
The services shown in this schedule up to 100,000 miles
( 166 000 km) should be performed after 100,000 miles
(166 000 km) at the same intervals. The services shown
at
150,000 miles (240 000 km) should be performed at
the same interval after
150,000 miles (240 000 km).
See “Owner Checks and Services” and “Periodic
Maintenance Inspections’’ following.
Footnotes
‘f The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not
nullify
the emission warranty or limit recall liability prior to the
completion
of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.
# Lubricate the front suspension, ball joints and kingpin
bushings, steering linkage and transfer case shift
linkage, parking brake cable guides, and brake
pedal springs.
+ A good time to check your brakes is during tire
rotation. See “Brake System Inspection’’ under “Periodic
Maintenance Inspection”
in Part C of this schedule.
:%* Drive axle service (see “Recommended Fluids and
Lubricants”
in the Index for proper lubricant to use):
0
0
0
Locking Differential -- Drain fluid and refill at first
engine
oil change. At subsequent oil changes, check
fluid level and add fluid as needed. If driving
in
dusty areas or towing a trailer, drain fluid and refill
every
15,000 miles (25 000 km).
Standard Differential
-- Check fluid level and add
fluid as needed at every oil change. If driving in
dusty areas or towing a trailer, drain fluid and refill
every
15,000 miles (25 000 km).
More frequent lubrication may be required for
heavy-duty use.
7-7

Downloaded from www.Manualslib.com manuals search engine Short TripKity Maintenance Schedule
3,000 Miles (5 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components (or every
3 months, whichever occurs first).
(See footnote
#.)
0 Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
(See footnote
**.)
I DATE I ACTUAL MILEAGE ISERVICED BY I
6,000 Miles (10 000 km,)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components (or every
3 months, whichever occurs first).
(See footnote
#.)
0 Check readfront axle fluid level and add fluid
as needed. Check constant velocity joints and
axle seals for lealung. (See footnote
**.)
0 Rotate tires. See “Tire Inspection and
Rotation” in the Index for proper rotation
pattern and additional information.
(See footnote
+.)
DATE SERVIChu BY ACTUAL MILEAGE

Downloaded from www.Manualslib.com manuals search engine I Short Wip/City Maintenance Schedule I
9,000 Miles (15 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components (or every
3 months, whichever occurs first).
(See footnote
#.)
Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
(See footnote
**.)
DATE SERVICED BY: ACTUAL MILEAGE
12,000 Miles (20 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An EInission Control Service.
0 Lubricate chassis components (or every
3 months, whichever occurs first).
(See footnote
#.)
0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and
axle seals for leaking. (See footnote
**.)
0 Rotate tires. See “Tire Inspection and
Rotation” in the Index for proper rotation
pattern and additional information.
(See footnote
+.)
7-9