1997 CHEVROLET ASTRO change wheel

Downloaded from www.Manualslib.com manuals search engine 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. 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 brakes 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.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
If your brake pedal goes down farther than normal, your
rear drum brakes may need adjustment. Adjust them by
backing up and firmly applying the brakes a few times.
Replacing Brake System Parts
The braking system on a modern vehicle is complex.
Its many parts have to be
of top quality and work well
together if the vehicle is to have really good braking.
Your vehicle was designed and tested with top-quality
GM brake parts. When
you replace parts of your braking
system
-- for example, when your brake linings wear
down and you have to have new ones put
in -- be sure
you get new approved GM replacement parts. If you
don’t, your brakes may
no longer work properly. For
example,
if someone puts in brake linings that are wrong
for your vehicle,
the balance between your front and
rear brakes can change
-- for the worse. The braking
performance you’ve come to expect can change
in many
other ways
if someone puts in the wrong replacement
brake parts.
6-35

Downloaded from www.Manualslib.com manuals search engine Tire Inspection and Rotation
Tires should be rotated every 6,000 to 8,000 miles
( 10 000 to 1 3 000 km). Any time you notice unusual
wear, rotate your tires as soon as possible and check
wheel alignment. Also check for damaged tires or
wheels. See “When It’s Time for New Tires’’ and
“Wheel Replacement” later in this section for
more information.
The purpose
of regular rotation is to achieve more
uniform wear
for all tires on the vehicle. The first
rotation is the most important. See “Scheduled
Maintenance Services”
in the Index for scheduled
rotation intervals. When rotating your tires, always
use the
correct rotation
pattern shown here.
Don’t include the compact spare tire in your
tire rotation.
After the tires have been rotated, adjust the front and
rear inflation pressures
as shown on the
Certificatioflire label. Make certain that all wheel nuts
are properly tightened. See “Wheel Nut Torque” in
the Index.
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.)
~ 6-45

Downloaded from www.Manualslib.com manuals search engine Normal Maintenance
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 truck dealer.
Engine Oil Filter
................ AC Type PF52
Air Cleaner
................... AC Type A 1 163C
Positive Crankcase
Ventilation (PCV) Valve
........ AC Type CV774C
Spark Plugs
................... AC Type 4 1-932
Spark Plug Gap
.......... 0.060 inches ( 1.52 mm)
Fuel Filter ..................... AC Type GF48 1
Thermostat
............... GM Part No. 1255 1472
Wiper Blades (Front)
............ Trico 221 10158, Pin Type
18 inches (45.7 cm) Length
Wiper Blade (Rear)
............. Trico 22 154396,
Pin Type
14 inches (35.5 cm) Length
Vehicle Dimensions*
Overall Length ............. 189.8 inches (482 cm)
Width
................... 77.5 inches (196.8 cm)
Height.
.................. 76.2 inches (193.5 cm)
Wheelbase
.............. 1 1 1.2 inches (282.4 cm)
Front Tread Width
......... 65.1 inches (165.4 cm)
Rear Tread Width
.......... 65.1 inches ( 1 65.4 cm)
*Figures reflect base equipment
only.
6-68

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 I Short lkip/City Maintenance Schedule I
15,000 Miles (25 000 km)
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 #.)
in dusty conditions. Replace filter if
necessary.
An Emission Control Service.
(See footnotef.)
0 Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
(See footnote
**.)
0 For Two-Wheel-Drive vehicles only: Clean
and repack the front wheel bearings (or
at
each brake relining, whichever occurs first).
0 Inspect air cleaner filter if you are driving
0 Change automatic transmission fluid and
filter if the vehicle is mainly driven under
one or more of these conditions:
- In heavy city traffic where the outside
temperature regularly reaches
90°F
(32°C) or higher.
- In hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or
delivery service.
If you do not use your vehicle under any of these
conditiorzs, change the jluid und.filter every
30,000 rniles (50 000 km).
DATE ACTUAL MILEAGE SERVICED BY
7-10

Downloaded from www.Manualslib.com manuals search engine I Short 6iplCity Maintenance Schedule I
30,000 Miles (50 000 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
#.)
17 Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
(See footnote
* * .)
0 For Two-Wheel-Drive vehicles only: Clean
and repack the front wheel bearings (or at
each brake relining, whichever occurs first).
0 Replace fuel filter. An Emission Control Service.
0 Replace air cleaner filter.
An Emission Control Service.
0 Change automatic transmission fluid and
filter if the vehicle is mainly driven under
one or more
of these conditions:
- In heavy city traffic where the outside
temperature regularly reaches
90 OF
(32°C) or higher.
(See footnote?.)
(Continued)
7-13

Downloaded from www.Manualslib.com manuals search engine Short TripKity Maintenance Schedule
42,000 Miles (70 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
7 Lubricate chassis components (or every
3 months, whichever occurs first).
(See footnote
#.)
0 Check readfkont 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
+.)
DATE ACTUAL MILEAGE SERVICED BY:
45,000 Miles (75 000 km)
0 Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
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 For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (or at
each brake relining, whichever occurs first).
Change automatic transmission fluid and
filter if the vehicle is mainly driven under
one or more
of these conditions:
0 Lubricate chassis components (or every
I I I I
7-16